How to Build MEVN Stack App from Scratch

This is a step by step MEVN stack tutorial, in this tutorial, we are going to learn how to create MEVN stack app. (MongoDB, Express.js, Vue.js, Node.js).

I will show you how to create a Full-stack single page application with Vue from scratch.

We will create a simple yet best Student Record Management system. This system efficiently allows users to perform CRUD (CREATE, READ, UPDATE & DELETE) operations.

We will create our server using Node and Express.js and store student records. We will use MongoDB. We will manage the front-end of the application with Vue.js.

So, let us start coding the MEVN Stack app with a practical example.

Table of Contents

• Create a New Vue Project
  

• Adding Bootstrap in Vue
  

• Build Vue Components
  

• Enable Vue Router
  

• Setting Up Navigation and Router View
  

• Add Axios in Vue.js
  

• Build Form in Vue with Bootstrap 4
  

• Setting up Node Server Environment
  

• Configure MongoDB Database
  

• Create Mongoose Model
  

• Create Route in Node/Express App
  

• Start Node/Express App
  

• Create Student Data with Axios POST
  

• Show Data List & Delete Data in Vue
  

• Update Data with POST Request
  

• Summary
  

Create a New Vue Project

To install Vue project, we must have Vue CLI installed on our development system.

Run the following command to install Vue CLI:

# npm
npm install -g @vue/cli

# yarn
yarn global add @vue/cli

Use the following command to install the vue project.

vue create vue-mevn-stack-app

Head over to vue project:

cd vue-mevn-stack-app

Run command to start the app on the browser:

npm run serve

Adding Bootstrap in Vue 2

Let us run the below command to install the Bootstrap 4 UI Framework.

npm install bootstrap

# or

yarn add bootstrap

Import the Bootstrap framework path inside the main.js file. Now, you can use Bootstrap UI components in your vue app.

import Vue from 'vue'
import App from './App.vue'
import router from './router'

import 'bootstrap/dist/css/bootstrap.min.css'

Vue.config.productionTip = false

new Vue({
  router,
  render: h => h(App)
}).$mount('#app')

Build Vue Components

Head over to src/components directory, here we have to create the following components. These components will handle the data in our full-stack Vue.Js application.

• CreateComponent.vue
• EditComponent.vue
• ListComponent.vue

Open src/CreateComponent.vue file and add the following code inside of it.

<template>
    <div class="row justify-content-center">
        <div class="col-md-6">
            <!-- Content goes here -->
        </div>
    </div>
</template>

<script>
    export default {
        data() {
            return {
            }
        }
    }
</script>
</div>

Open src/EditComponent.vue file and place code inside of it.

<template>
    <div class="row justify-content-center">
        <div class="col-md-6">
            <!-- Update Student content -->
        </div>
    </div>
</template>

<script>
    export default {
        data() {
            return {
            }
        }
    }
</script>

Open src/ListComponent.vue file and add the below code in it.

<template>
    <div class="row justify-content-center">
        <div class="col-md-6">
            <!-- Display Student List -->
        </div>
    </div>
</template>

<script>
    export default {
        data() {
            return {
            }
        }
    }
</script>

Enable Vue Router

Open src/router/index.js and replace the existing code with the following code.

import Vue from 'vue'
import VueRouter from 'vue-router'

Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    name: 'home',
    component: () => import('../components/CreateComponent')
  },
  {
    path: '/view',
    name: 'view',
    component: () => import('../components/ListComponent')
  },
  {
    path: '/edit/:id',
    name: 'edit',
    component: () => import('../components/EditComponent')
  }
]

const router = new VueRouter({
  mode: 'history',
  base: process.env.BASE_URL,
  routes
})

export default router

Setting Up Navigation with Bootstrap and Router View in Vue

Go to src/App.vue file, here we define the Bootstrap Navigation component, router-view directive and the router-link directive.

The router-link is the component for facilitating user navigation in a router-enabled vue app.

The router-view component is the main component that is responsible for rendering the matched component for the provided path.

<template>
  <div>
    <!-- Nav bar -->
    <nav class="navbar navbar-dark bg-primary justify-content-between flex-nowrap flex-row">
      <div class="container">
        <a class="navbar-brand float-left">MEVN Stack Example</a>
        <ul class="nav navbar-nav flex-row float-right">
          <li class="nav-item">
            <router-link class="nav-link pr-3" to="/">Create Student</router-link>
          </li>
          <li class="nav-item">
            <router-link class="nav-link" to="/view">View Students</router-link>
          </li>
        </ul>
      </div>
    </nav>

    <!-- Router view -->
    <div class="container mt-5">
      <router-view></router-view>
    </div>
  </div>
</template>

Add Axios in Vue.js 2 to Handle HTTP Requests

Run command to install Axios:

npm install axios

# or

yarn add axios

Axios is a promise based HTTP client for the browser and node.js,

Build Form in Vue with Bootstrap 4

We require to store the data in the MEVN stack app, so we need to build a vue form using Bootstrap Form component.

Open components/CreateComponent.vue file, then place the following code in it.

<template>
    <div class="row justify-content-center">
        <div class="col-md-6">
            <h3 class="text-center">Create Student</h3>
            <form @submit.prevent="handleSubmitForm">
                <div class="form-group">
                    <label>Name</label>
                    <input type="text" class="form-control" v-model="student.name" required>
                </div>

                <div class="form-group">
                    <label>Email</label>
                    <input type="email" class="form-control" v-model="student.email" required>
                </div>

                <div class="form-group">
                    <label>Phone</label>
                    <input type="text" class="form-control" v-model="student.phone" required>
                </div>

                <div class="form-group">
                    <button class="btn btn-danger btn-block">Create</button>
                </div>
            </form>
        </div>
    </div>
</template>

<script>
    export default {
        data() {
            return {
                student: {
                   name: '',
                   email: '',
                   phone: ''
                }
            }
        },
        methods: {
            handleSubmitForm() { }
        }
    }
</script>

We created a basic form with name, email and phone number field. We created a beautiful form using Bootstrap form component.

The student object works with two-way data binding approach; it merely means that any data-related changes affecting the model are immediately propagated to the matching view.

Here is the form which you can check in the browser.

Setting up Node Server Environment

Now, we need to create REST APIs using Node + Express & MongoDB in Vue application. Create backend folder at the root of Vue project.

mkdir backend && cd backend

Generate separate package.json for node server.

npm init

Run command to install the following dependencies for Node/Express js.

npm i body-parser cors express mongoose 

Also, install a nodemon server as a development dependency. So that we do not need to restart every time, we change our server code.

Install nodemon as a development dependency, It automates the server starting process.

npm install nodemon

# or

yarn add nodemon

Configure & Start MongoDB Database

Create backend/database.js file at the root of your node application. Next, add the given code in it.

module.exports = {
   db: 'mongodb://localhost:27017/vuecrudmevn'
}

In this tutorial, we are working with MongoDB to store students data, so you must set up MongoDB on your development system.

You can follow this tutorial for the installation guidance at Install MongoDB on macOS, Linux and Windows.

Open the terminal window and run the following command to start the MongoDB on your local machine.

mongod --config /usr/local/etc/mongod.conf

brew services start mongodb-community@4.2

mongo

Create Mongoose Model

Create models/Student.js and paste the below code inside the file. We will define name, email and phone values inside the Student model.

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

let studentSchema = new Schema({
  name: {
    type: String
  },
  email: {
    type: String
  },
  phone: {
    type: Number
  },
}, {
  collection: 'students'
})

module.exports = mongoose.model('Student', studentSchema)

Create Route in Node/Express App

Create a backend/routes directory; here, we have to create student.route.js file and place all the given below code inside of it.

const express = require('express');
const studentRoute = express.Router();

// Student model
let StudentModel = require('../models/Student');

studentRoute.route('/').get((req, res) => {
    StudentModel.find((error, data) => {
     if (error) {
       return next(error)
     } else {
       res.json(data)
     }
   })
 })

 studentRoute.route('/create-student').post((req, res, next) => {
    StudentModel.create(req.body, (error, data) => {
    if (error) {
      return next(error)
    } else {
      res.json(data)
    }
  })
});

studentRoute.route('/edit-student/:id').get((req, res) => {
   StudentModel.findById(req.params.id, (error, data) => {
    if (error) {
      return next(error)
    } else {
      res.json(data)
    }
  })
})

// Update student
studentRoute.route('/update-student/:id').post((req, res, next) => {
  StudentModel.findByIdAndUpdate(req.params.id, {
    $set: req.body
  }, (error, data) => {
    if (error) {
      return next(error);
    } else {
      res.json(data)
      console.log('Student successfully updated!')
    }
  })
})

// Delete student
studentRoute.route('/delete-student/:id').delete((req, res, next) => {
  StudentModel.findByIdAndRemove(req.params.id, (error, data) => {
    if (error) {
      return next(error);
    } else {
      res.status(200).json({
        msg: data
      })
    }
  })
})

module.exports = studentRoute;

We defined the routes these routes will communicate with the server using the Axios library. We can perform CRUD operation using the GET, POST, UPDATE & DELETE methods.

Create the backend/app.js file and place the following code that contains the Node server settings.

let express = require('express'),
  cors = require('cors'),
  mongoose = require('mongoose'),
  database = require('./database'),
  bodyParser = require('body-parser');

// Connect mongoDB
mongoose.Promise = global.Promise;
mongoose.connect(database.db, {
    useNewUrlParser: true,
    useUnifiedTopology: true
}).then(() => {
    console.log("Database connected")
  },
  error => {
    console.log("Database could't be connected to: " + error)
  }
)

const studentAPI = require('../backend/routes/student.route')
const app = express();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
  extended: false
}));
app.use(cors());

// API
app.use('/api', studentAPI)

// Create port
const port = process.env.PORT || 4000;
const server = app.listen(port, () => {
  console.log('Connected to port ' + port)
})

// Find 404
app.use((req, res, next) => {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  console.error(err.message);
  if (!err.statusCode) err.statusCode = 500;
  res.status(err.statusCode).send(err.message);
});

Also, don’t forget to register the app.js value inside the “main” property in package.json file.

{
  "name": "vue-mevn-stack",
  "version": "1.0.0",
  "description": "",
  "main": "app.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.19.0",
    "cors": "^2.8.5",
    "express": "^4.17.1",
    "mongoose": "^5.9.10"
  },
  "devDependencies": {
    "nodemon": "^2.0.3"
  }
}

Start Node/Express App

We have built following API using Node and Express in Vue.js.

Open a new terminal window and start the MongoDB:

mongo

Open a new terminal window and start the nodemon server:

nodemon

You can view server running on http://localhost:4000/api

Open another terminal window and start the vue app:

npm run serve

You can view vue app running on http://localhost:8080

Create Student Data with Axios POST

The Axios post method takes the REST API and makes the POST request to the server. It creates the student data that we are adding in the mongoDB database.

Once the data is sent to the server, you can then check the stored data on http://localhost:4000/api

Add the given below code inside the components/CreateComponent.vue file.

<template>
    <div class="row justify-content-center">
        <div class="col-md-6">
            <h3 class="text-center">Create Student</h3>
            <form @submit.prevent="handleSubmitForm">
                <div class="form-group">
                    <label>Name</label>
                    <input type="text" class="form-control" v-model="student.name" required>
                </div>

                <div class="form-group">
                    <label>Email</label>
                    <input type="email" class="form-control" v-model="student.email" required>
                </div>

                <div class="form-group">
                    <label>Phone</label>
                    <input type="text" class="form-control" v-model="student.phone" required>
                </div>

                <div class="form-group">
                    <button class="btn btn-danger btn-block">Create</button>
                </div>
            </form>
        </div>
    </div>
</template>

<script>
    import axios from "axios";

    export default {
        data() {
            return {
                student: {
                   name: '',
                   email: '',
                   phone: ''
                }
            }
        },
        methods: {
            handleSubmitForm() {
                let apiURL = 'http://localhost:4000/api/create-student';

                axios.post(apiURL, this.student).then(() => {
                  this.$router.push('/view')
                  this.student = {
                    name: '',
                    email: '',
                    phone: ''
                  }
                }).catch(error => {
                    console.log(error)
                });
            }
        }
    }
</script>

Show Data List & Delete Data in Vue

Now, we will show the data in the tabular form using Bootstrap Table components, and we will make the axios.get() request to render the data from the server.

Add the given below code inside the components/ListComponent.vue file.

<template>
    <div class="row">
        <div class="col-md-12">
            <table class="table table-striped">
                <thead class="thead-dark">
                    <tr>
                        <th>Name</th>
                        <th>Email</th>
                        <th>Phone</th>
                        <th>Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <tr v-for="student in Students" :key="student._id">
                        <td>{{ student.name }}</td>
                        <td>{{ student.email }}</td>
                        <td>{{ student.phone }}</td>
                        <td>
                            <router-link :to="{name: 'edit', params: { id: student._id }}" class="btn btn-success">Edit
                            </router-link>
                            <button @click.prevent="deleteStudent(student._id)" class="btn btn-danger">Delete</button>
                        </td>
                    </tr>
                </tbody>
            </table>
        </div>
    </div>
</template>

<script>
    import axios from "axios";

    export default {
        data() {
            return {
                Students: []
            }
        },
        created() {
            let apiURL = 'http://localhost:4000/api';
            axios.get(apiURL).then(res => {
                this.Students = res.data;
            }).catch(error => {
                console.log(error)
            });
        },
        methods: {
            deleteStudent(id){
                let apiURL = `http://localhost:4000/api/delete-student/${id}`;
                let indexOfArrayItem = this.Students.findIndex(i => i._id === id);

                if (window.confirm("Do you really want to delete?")) {
                    axios.delete(apiURL).then(() => {
                        this.Students.splice(indexOfArrayItem, 1);
                    }).catch(error => {
                        console.log(error)
                    });
                }
            }
        }
    }
</script>

<style>
    .btn-success {
        margin-right: 10px;
    }
</style>

To delete the student object from the database, we defined the deleteStudent() function and bound it to click event with an id parameter.

The apiURL contains the api/delete-student/:id API, to find out the index of the clicked student data index from the Students array, we took the help of findIndex() method.

Update Data with POST Request

Add the following code inside the components/EditComponent.vue file.

<template>
    <div class="row justify-content-center">
        <div class="col-md-6">
            <h3 class="text-center">Update Student</h3>
            <form @submit.prevent="handleUpdateForm">
                <div class="form-group">
                    <label>Name</label>
                    <input type="text" class="form-control" v-model="student.name" required>
                </div>

                <div class="form-group">
                    <label>Email</label>
                    <input type="email" class="form-control" v-model="student.email" required>
                </div>

                <div class="form-group">
                    <label>Phone</label>
                    <input type="text" class="form-control" v-model="student.phone" required>
                </div>

                <div class="form-group">
                    <button class="btn btn-danger btn-block">Update</button>
                </div>
            </form>
        </div>
    </div>
</template>

<script>
import axios from "axios";

export default {
    data() {
        return {
            student: { }
        }
    },
    created() {
        let apiURL = `http://localhost:4000/api/edit-student/${this.$route.params.id}`;

        axios.get(apiURL).then((res) => {
            this.student = res.data;
        })
    },
    methods: {
        handleUpdateForm() {
            let apiURL = `http://localhost:4000/api/update-student/${this.$route.params.id}`;

            axios.post(apiURL, this.student).then((res) => {
                console.log(res)
                this.$router.push('/view')
            }).catch(error => {
                console.log(error)
            });
        }
    }
}
</script>

Here we have to deal with two things, and we have to render the data when the user lands on student details component and make the post request to update the information on the server.

To get the current id from the existing url, use this.$route.params.id vue API.

Using the same API we can get the id from the url and can update the database values by consuming the api/update-student/:id API.

Summary

We have finished MEVN Stack tutorial.

# Start the MEVN Stack project.

Git clone https://github.com/SinghDigamber/vue-mevn-stack-app.git

Get inside the project
cd vue-mevn-stack-app

Install the required packages:
npm install

Start the vue app on http://localhost:8080
npm run serve

Get inside the Node server folder:
cd backend

Install the required packages:
npm install

Start the mongodb server.
mongo

Start node server on http://localhost:4000/api 
nodemon

#mongodb #express #vue-js #node-js #javascript

What is GEEK

Buddha Community

How long does it take to develop/build an app?

With more of us using smartphones, the popularity of mobile applications has exploded. In the digital era, the number of people looking for products and services online is growing rapidly. Smartphone owners look for mobile applications that give them quick access to companies’ products and services. As a result, mobile apps provide customers with a lot of benefits in just one device.

Likewise, companies use mobile apps to increase customer loyalty and improve their services. Mobile Developers are in high demand as companies use apps not only to create brand awareness but also to gather information. For that reason, mobile apps are used as tools to collect valuable data from customers to help companies improve their offer.

There are many types of mobile applications, each with its own advantages. For example, native apps perform better, while web apps don’t need to be customized for the platform or operating system (OS). Likewise, hybrid apps provide users with comfortable user experience. However, you may be wondering how long it takes to develop an app.

To give you an idea of how long the app development process takes, here’s a short guide.

App Idea & Research

_Average time spent: two to five weeks _

This is the initial stage and a crucial step in setting the project in the right direction. In this stage, you brainstorm ideas and select the best one. Apart from that, you’ll need to do some research to see if your idea is viable. Remember that coming up with an idea is easy; the hard part is to make it a reality.

All your ideas may seem viable, but you still have to run some tests to keep it as real as possible. For that reason, when Web Developers are building a web app, they analyze the available ideas to see which one is the best match for the targeted audience.

Targeting the right audience is crucial when you are developing an app. It saves time when shaping the app in the right direction as you have a clear set of objectives. Likewise, analyzing how the app affects the market is essential. During the research process, App Developers must gather information about potential competitors and threats. This helps the app owners develop strategies to tackle difficulties that come up after the launch.

The research process can take several weeks, but it determines how successful your app can be. For that reason, you must take your time to know all the weaknesses and strengths of the competitors, possible app strategies, and targeted audience.

The outcomes of this stage are app prototypes and the minimum feasible product.

#android app #frontend #ios app #minimum viable product (mvp) #mobile app development #web development #android app development #app development #app development for ios and android #app development process #ios and android app development #ios app development #stages in app development

How to start an electric scooter facility/fleet in a university campus/IT park

Are you leading an organization that has a large campus, e.g., a large university? You are probably thinking of introducing an electric scooter/bicycle fleet on the campus, and why wouldn’t you?

Introducing micro-mobility in your campus with the help of such a fleet would help the people on the campus significantly. People would save money since they don’t need to use a car for a short distance. Your campus will see a drastic reduction in congestion, moreover, its carbon footprint will reduce.

Micro-mobility is relatively new though and you would need help. You would need to select an appropriate fleet of vehicles. The people on your campus would need to find electric scooters or electric bikes for commuting, and you need to provide a solution for this.

To be more specific, you need a short-term electric bike rental app. With such an app, you will be able to easily offer micro-mobility to the people on the campus. We at Devathon have built Autorent exactly for this.

What does Autorent do and how can it help you? How does it enable you to introduce micro-mobility on your campus? We explain these in this article, however, we will touch upon a few basics first.

Micro-mobility: What it is

You are probably thinking about micro-mobility relatively recently, aren’t you? A few relevant insights about it could help you to better appreciate its importance.

Micro-mobility is a new trend in transportation, and it uses vehicles that are considerably smaller than cars. Electric scooters (e-scooters) and electric bikes (e-bikes) are the most popular forms of micro-mobility, however, there are also e-unicycles and e-skateboards.

You might have already seen e-scooters, which are kick scooters that come with a motor. Thanks to its motor, an e-scooter can achieve a speed of up to 20 km/h. On the other hand, e-bikes are popular in China and Japan, and they come with a motor, and you can reach a speed of 40 km/h.

You obviously can’t use these vehicles for very long commutes, however, what if you need to travel a short distance? Even if you have a reasonable public transport facility in the city, it might not cover the route you need to take. Take the example of a large university campus. Such a campus is often at a considerable distance from the central business district of the city where it’s located. While public transport facilities may serve the central business district, they wouldn’t serve this large campus. Currently, many people drive their cars even for short distances.

As you know, that brings its own set of challenges. Vehicular traffic adds significantly to pollution, moreover, finding a parking spot can be hard in crowded urban districts.

Well, you can reduce your carbon footprint if you use an electric car. However, electric cars are still new, and many countries are still building the necessary infrastructure for them. Your large campus might not have the necessary infrastructure for them either. Presently, electric cars don’t represent a viable option in most geographies.

As a result, you need to buy and maintain a car even if your commute is short. In addition to dealing with parking problems, you need to spend significantly on your car.

All of these factors have combined to make people sit up and think seriously about cars. Many people are now seriously considering whether a car is really the best option even if they have to commute only a short distance.

This is where micro-mobility enters the picture. When you commute a short distance regularly, e-scooters or e-bikes are viable options. You limit your carbon footprints and you cut costs!

Businesses have seen this shift in thinking, and e-scooter companies like Lime and Bird have entered this field in a big way. They let you rent e-scooters by the minute. On the other hand, start-ups like Jump and Lyft have entered the e-bike market.

Think of your campus now! The people there might need to travel short distances within the campus, and e-scooters can really help them.

How micro-mobility can benefit you

What advantages can you get from micro-mobility? Let’s take a deeper look into this question.

Micro-mobility can offer several advantages to the people on your campus, e.g.:

• Affordability: Shared e-scooters are cheaper than other mass transportation options. Remember that the people on your campus will use them on a shared basis, and they will pay for their short commutes only. Well, depending on your operating model, you might even let them use shared e-scooters or e-bikes for free!
• Convenience: Users don’t need to worry about finding parking spots for shared e-scooters since these are small. They can easily travel from point A to point B on your campus with the help of these e-scooters.
• Environmentally sustainable: Shared e-scooters reduce the carbon footprint, moreover, they decongest the roads. Statistics from the pilot programs in cities like Portland and Denver showimpressive gains around this key aspect.
• Safety: This one’s obvious, isn’t it? When people on your campus use small e-scooters or e-bikes instead of cars, the problem of overspeeding will disappear. you will see fewer accidents.

#android app #autorent #ios app #mobile app development #app like bird #app like bounce #app like lime #autorent #bird scooter business model #bird scooter rental #bird scooter rental cost #bird scooter rental price #clone app like bird #clone app like bounce #clone app like lime #electric rental scooters #electric scooter company #electric scooter rental business #how do you start a moped #how to start a moped #how to start a scooter rental business #how to start an electric company #how to start electric scooterrental business #lime scooter business model #scooter franchise #scooter rental business #scooter rental business for sale #scooter rental business insurance #scooters franchise cost #white label app like bird #white label app like bounce #white label app like lime

Best Electric Bikes and Scooters for Rental Business or Campus Facility

The electric scooter revolution has caught on super-fast taking many cities across the globe by storm. eScooters, a renovated version of old-school scooters now turned into electric vehicles are an environmentally friendly solution to current on-demand commute problems. They work on engines, like cars, enabling short traveling distances without hassle. The result is that these groundbreaking electric machines can now provide faster transport for less — cheaper than Uber and faster than Metro.

Since they are durable, fast, easy to operate and maintain, and are more convenient to park compared to four-wheelers, the eScooters trend has and continues to spike interest as a promising growth area. Several companies and universities are increasingly setting up shop to provide eScooter services realizing a would-be profitable business model and a ready customer base that is university students or residents in need of faster and cheap travel going about their business in school, town, and other surrounding areas.

Electric Scooters Trends and Statistics

In many countries including the U.S., Canada, Mexico, U.K., Germany, France, China, Japan, India, Brazil and Mexico and more, a growing number of eScooter users both locals and tourists can now be seen effortlessly passing lines of drivers stuck in the endless and unmoving traffic.

A recent report by McKinsey revealed that the E-Scooter industry will be worth― $200 billion to $300 billion in the United States, $100 billion to $150 billion in Europe, and $30 billion to $50 billion in China in 2030. The e-Scooter revenue model will also spike and is projected to rise by more than 20% amounting to approximately $5 billion.

And, with a necessity to move people away from high carbon prints, traffic and congestion issues brought about by car-centric transport systems in cities, more and more city planners are developing more bike/scooter lanes and adopting zero-emission plans. This is the force behind the booming electric scooter market and the numbers will only go higher and higher.

Companies that have taken advantage of the growing eScooter trend develop an appthat allows them to provide efficient eScooter services. Such an app enables them to be able to locate bike pick-up and drop points through fully integrated google maps.

List of Best Electric Bikes for Rental Business or Campus Facility 2020:

It’s clear that e scooters will increasingly become more common and the e-scooter business model will continue to grab the attention of manufacturers, investors, entrepreneurs. All this should go ahead with a quest to know what are some of the best electric bikes in the market especially for anyone who would want to get started in the electric bikes/scooters rental business.

We have done a comprehensive list of the best electric bikes! Each bike has been reviewed in depth and includes a full list of specs and a photo.

Billy eBike

 https://www.kickstarter.com/projects/enkicycles/billy-were-redefining-joyrides

To start us off is the Billy eBike, a powerful go-anywhere urban electric bike that’s specially designed to offer an exciting ride like no other whether you want to ride to the grocery store, cafe, work or school. The Billy eBike comes in 4 color options – Billy Blue, Polished aluminium, Artic white, and Stealth black.

Price: $2490

Available countries

Available in the USA, Europe, Asia, South Africa and Australia.This item ships from the USA. Buyers are therefore responsible for any taxes and/or customs duties incurred once it arrives in your country.

Features

• Control – Ride with confidence with our ultra-wide BMX bars and a hyper-responsive twist throttle.
• Stealth- Ride like a ninja with our Gates carbon drive that’s as smooth as butter and maintenance-free.
• Drive – Ride further with our high torque fat bike motor, giving a better climbing performance.
• Accelerate – Ride quicker with our 20-inch lightweight cutout rims for improved acceleration.
• Customize – Ride your own way with 5 levels of power control. Each level determines power and speed.
• Flickable – Ride harder with our BMX /MotoX inspired geometry and lightweight aluminum package

Specifications

• Maximum speed: 20 mph (32 km/h)
• Range per charge: 41 miles (66 km)
• Maximum Power: 500W
• Motor type: Fat Bike Motor: Bafang RM G060.500.DC
• Load capacity: 300lbs (136kg)
• Battery type: 13.6Ah Samsung lithium-ion,
• Battery capacity: On/off-bike charging available
• Weight: w/o batt. 48.5lbs (22kg), w/ batt. 54lbs (24.5kg)
• Front Suspension: Fully adjustable air shock, preload/compression damping /lockout
• Rear Suspension: spring, preload adjustment
• Built-in GPS

Why Should You Buy This?

• Riding fun and excitement
• Better climbing ability and faster acceleration.
• Ride with confidence
• Billy folds for convenient storage and transportation.
• Shorty levers connect to disc brakes ensuring you stop on a dime
• belt drives are maintenance-free and clean (no oil or lubrication needed)

**Who Should Ride Billy? **

Both new and experienced riders

**Where to Buy? **Local distributors or ships from the USA.

Genze 200 series e-Bike

 https://www.genze.com/fleet/

Featuring a sleek and lightweight aluminum frame design, the 200-Series ebike takes your riding experience to greater heights. Available in both black and white this ebike comes with a connected app, which allows you to plan activities, map distances and routes while also allowing connections with fellow riders.

Price: $2099.00

Available countries

The Genze 200 series e-Bike is available at GenZe retail locations across the U.S or online via GenZe.com website. Customers from outside the US can ship the product while incurring the relevant charges.

Features

• 2 Frame Options
• 2 Sizes
• Integrated/Removable Battery
• Throttle and Pedal Assist Ride Modes
• Integrated LCD Display
• Connected App
• 24 month warranty
• GPS navigation
• Bluetooth connectivity

Specifications

• Maximum speed: 20 mph with throttle
• Range per charge: 15-18 miles w/ throttle and 30-50 miles w/ pedal assist
• Charging time: 3.5 hours
• Motor type: Brushless Rear Hub Motor
• Gears: Microshift Thumb Shifter
• Battery type: Removable Samsung 36V, 9.6AH Li-Ion battery pack
• Battery capacity: 36V and 350 Wh
• Weight: 46 pounds
• Derailleur: 8-speed Shimano
• Brakes: Dual classic
• Wheels: 26 x 20 inches
• Frame: 16, and 18 inches
• Operating Mode: Analog mode 5 levels of Pedal Assist Thrott­le Mode

Norco from eBikestore

 https://ebikestore.com/shop/norco-vlt-s2/

The Norco VLT S2 is a front suspension e-Bike with solid components alongside the reliable Bosch Performance Line Power systems that offer precise pedal assistance during any riding situation.

Price: $2,699.00

Available countries

This item is available via the various Norco bikes international distributors.

Features

• VLT aluminum frame- for stiffness and wheel security.
• Bosch e-bike system – for their reliability and performance.
• E-bike components – for added durability.
• Hydraulic disc brakes – offer riders more stopping power for safety and control at higher speeds.
• Practical design features – to add convenience and versatility.

Specifications

• Maximum speed: KMC X9 9spd
• Motor type: Bosch Active Line
• Gears: Shimano Altus RD-M2000, SGS, 9 Speed
• Battery type: Power Pack 400
• Battery capacity: 396Wh
• Suspension: SR Suntour suspension fork
• Frame: Norco VLT, Aluminum, 12x142mm TA Dropouts

Bodo EV

http://www.bodoevs.com/bodoev/products_show.asp?product_id=13

Manufactured by Bodo Vehicle Group Limited, the Bodo EV is specially designed for strong power and extraordinary long service to facilitate super amazing rides. The Bodo Vehicle Company is a striking top in electric vehicles brand field in China and across the globe. Their Bodo EV will no doubt provide your riders with high-level riding satisfaction owing to its high-quality design, strength, breaking stability and speed.

Price: $799

Available countries

This item ships from China with buyers bearing the shipping costs and other variables prior to delivery.

Features

• Reliable
• Environment friendly
• Comfortable riding
• Fashionable
• Economical
• Durable – long service life
• Braking stability
• LED lighting technology

Specifications

• Maximum speed: 45km/h
• Range per charge: 50km per person
• Charging time: 8 hours
• Maximum Power: 3000W
• Motor type: Brushless DC Motor
• Load capacity: 100kg
• Battery type: Lead-acid battery
• Battery capacity: 60V 20AH
• Weight: w/o battery 47kg

#android app #autorent #entrepreneurship #ios app #minimum viable product (mvp) #mobile app development #news #app like bird #app like bounce #app like lime #autorent #best electric bikes 2020 #best electric bikes for rental business #best electric kick scooters 2020 #best electric kickscooters for rental business #best electric scooters 2020 #best electric scooters for rental business #bird scooter business model #bird scooter rental #bird scooter rental cost #bird scooter rental price #clone app like bird #clone app like bounce #clone app like lime #electric rental scooters #electric scooter company #electric scooter rental business #how do you start a moped #how to start a moped #how to start a scooter rental business #how to start an electric company #how to start electric scooterrental business #lime scooter business model #scooter franchise #scooter rental business #scooter rental business for sale #scooter rental business insurance #scooters franchise cost #white label app like bird #white label app like bounce #white label app like lime

ThruwayBundle: Bundle for Building Real-time Apps in Symfony

ThruwayBundle

This a Symfony Bundle for Thruway, which is a php implementation of WAMP (Web Application Messaging Protocol).

Note: This project is still undergoing a lot of changes, so the API will change.

Quick Start with Composer

Install the Thruway Bundle

  $ composer require "voryx/thruway-bundle"

Update AppKernel.php (when using Symfony < 4)

$bundles = array(
    // ...
    new Voryx\ThruwayBundle\VoryxThruwayBundle(),
    // ...
);

Configuration

#app/config/config.yml

voryx_thruway:
    realm: 'realm1'
    url: 'ws://127.0.0.1:8081' #The url that the clients will use to connect to the router
    router:
        ip: '127.0.0.1'  # the ip that the router should start on
        port: '8080'  # public facing port.  If authentication is enabled, this port will be protected
        trusted_port: '8081' # Bypasses all authentication.  Use this for trusted clients.
#        authentication: false # true will load the AuthenticationManager
    locations:
        bundles: ["AppBundle"]
#        files:
#            - "Acme\\DemoBundle\\Controller\\DemoController"
#
# For symfony 4, this bundle will automatically scan for annotated worker files in the src/Controller folder
      

With Symfony 4 use a filename like: config/packages/voryx.yaml

If you are using the in-memory user provider, you'll need to add a thruway to the security firewall and set the in_memory_user_provider.

#app/config/security.yml

security: 
   firewalls:
        thruway:
            security: false	     

You can also tag services with thruway.resource and any annotation will get picked up

<service id="some.service" class="Acme\Bundle\SomeService">
    <tag name="thruway.resource"/>
</service>

Note: tagging a service as thruway.resource will make it public.

services:
    App\Worker\:
        resource: '../src/Worker'
        tags: ['thruway.resource']

Authentication with FOSUserBundle via WampCRA

Change the Password Encoder (tricky on existing sites) to master wamp challenge

#app/config/security.yml

security:
    ...
    encoders:
        FOS\UserBundle\Model\UserInterface:
            algorithm:            pbkdf2
            hash_algorithm:       sha256
            encode_as_base64:     true
            iterations:           1000
            key_length:           32

set voryx_thruway.user_provider to "fos_user.user_provider"

#app/config/config.yml

voryx_thruway:
    user_provider: 'fos_user.user_provider.username' #fos_user.user_provider.username_email login with email

The WAMP-CRA service is already configured, we just need to add a tag to it to have the bundle install it:

    wamp_cra_auth:
        class: Thruway\Authentication\WampCraAuthProvider
        parent: voryx.thruway.wamp.cra.auth.client
        tags:
            - { name: thruway.internal_client }

Custom Authorization Manager

You can set your own Authorization Manager in order to check if a user (identified by its authid) is allowed to publish | subscribe | call | register

Create your Authorization Manager service, extending RouterModuleClient and implementing RealmModuleInterface (see the Thruway doc for details)

// src/ACME/AppBundle/Security/MyAuthorizationManager.php


use Thruway\Event\MessageEvent;
use Thruway\Event\NewRealmEvent;
use Thruway\Module\RealmModuleInterface;
use Thruway\Module\RouterModuleClient;

class MyAuthorizationManager extends RouterModuleClient implements RealmModuleInterface
{
    /**
     * Listen for Router events.
     * Required to add the authorization module to the realm
     *
     * @return array
     */
    public static function getSubscribedEvents()
    {
        return [
            'new_realm' => ['handleNewRealm', 10]
        ];
    }

    /**
     * @param NewRealmEvent $newRealmEvent
     */
    public function handleNewRealm(NewRealmEvent $newRealmEvent)
    {
        $realm = $newRealmEvent->realm;

        if ($realm->getRealmName() === $this->getRealm()) {
            $realm->addModule($this);
        }
    }

    /**
     * @return array
     */
    public function getSubscribedRealmEvents()
    {
        return [
            'PublishMessageEvent'   => ['authorize', 100],
            'SubscribeMessageEvent' => ['authorize', 100],
            'RegisterMessageEvent'  => ['authorize', 100],
            'CallMessageEvent'      => ['authorize', 100],
        ];
    }

    /**
     * @param MessageEvent $msg
     * @return bool
     */
    public function authorize(MessageEvent $msg)
    {
        if ($msg->session->getAuthenticationDetails()->getAuthId() === 'username') {
            return true;
        }
        return false;
    }
}

Register your authorization manager service

     my_authorization_manager:
        class: ACME\AppBundle\Security\MyAuthorizationManager

Insert your service name in the voryx_thruway config

#app/config/config.yml

voryx_thruway:
    ...
        authorization: my_authorization_manager # insert the name of your custom authorizationManager
   ...

Restart the Thruway server; it will now check authorization upon publish | subscribe | call | register. Remember to catch error when you try to subscribe to a topic (or any other action) as it may now be denied and this will be returned as an error.

Usage

Register RPC

    use Voryx\ThruwayBundle\Annotation\Register;
    
    /**
     *
     * @Register("com.example.add")
     *
     */
    public function addAction($num1, $num2)
    {
        return $num1 + $num2;
    }

Call RPC

    public function call($value)
    {
        $client = $this->container->get('thruway.client');
        $client->call("com.myapp.add", [2, 3])->then(
            function ($res) {
                echo $res[0];
            }
        );
    }

Subscribe

     use Voryx\ThruwayBundle\Annotation\Subscribe;

    /**
     *
     * @Subscribe("com.example.subscribe")
     *
     */
    public function subscribe($value)
    {
        echo $value;
    }

Publish

    public function publish($value)
    {
        $client = $this->container->get('thruway.client');
        $client->publish("com.myapp.hello_pubsub", [$value]);
    }

It uses Symfony Serializer, so it can serialize and deserialize Entities

         use Voryx\ThruwayBundle\Annotation\Register;

    /**
     *
     * @Register("com.example.addrpc", serializerEnableMaxDepthChecks=true)
     *
     */
    public function addAction(Post $post)
    {
        //Do something to $post

        return $post;
    }

Start the Thruway Process

You can start the default Thruway workers (router and client workers), without any additional configuration.

$ nohup php app/console thruway:process start &

By default, the router starts on ws://127.0.0.1:8080

Workers

The Thruway bundle will start up a separate process for the router and each defined worker. If you haven't defined any workers, all of the annotated calls and subscriptions will be started within the default worker.

There are two main ways to break your application apart into multiple workers.

Use the worker property on the Register and Subscribe annotations. The following RPC will be added to the posts worker.

  use Voryx\ThruwayBundle\Annotation\Register;

  /**
  * @Register("com.example.addrpc", serializerEnableMaxDepthChecks=true, worker="posts")
  */
  public function addAction(Post $post)

Use the @Worker annotation on the class. The following annotation will create a worker called chat that can have a max of 5 instances.

  use Voryx\ThruwayBundle\Annotation\Worker;

  /**
  * @Worker("chat", maxProcesses="5")
  */
  class ChatController

If a worker is shut down with anything other than SIGTERM, it will automatically be restarted.

More Commands

To see a list of running processes (workers)

$ php app/console thruway:process status

Stop a process, i.e. default

$ php app/console thruway:process stop default

Start a process, i.e. default

$ php app/console thruway:process start default

Javascript Client

For the client, you can use AutobahnJS or any other WAMPv2 compatible client.

Here are some examples

Symfony 4 Quick Start

composer create-project symfony/skeleton my_project

cd my_project

composer require symfony/expression-language

composer require symfony/annotations-pack

composer require voryx/thruway-bundle:dev-master

Create config/packages/my_project.yml with the following config:

voryx_thruway:
    realm: 'realm1'
    url: 'ws://127.0.0.1:8081' #The url that the clients will use to connect to the router
    router:
        ip: '127.0.0.1'  # the ip that the router should start on
        port: '8080'  # public facing port.  If authentication is enabled, this port will be protected
        trusted_port: '8081' # Bypasses all authentication.  Use this for trusted clients.

Create the controller src/Controller/TestController.php

<?php
namespace App\Controller;

use Voryx\ThruwayBundle\Annotation\Register;

class TestController
{
    /**
     * @Register("com.example.add")
     */
    public function addAction($num1, $num2)
    {
        return $num1 + $num2;
    }
}

Test to see if the RPC has been configured correctly bin/console thruway:debug

 URI             Type Worker  File                                                  Method    
 com.example.add RPC  default /my_project/src/Controller/TestController.php         addAction 

For more debug info for the RPC we created: bin/console thruway:debug com.example.add

Start everything: bin/console thruway:process start

The RPC com.example.add is now available to any WAMP client connected to ws://127.0.0.1:8081 on realm1.

Author: Voryx
Source Code: https://github.com/voryx/ThruwayBundle 
License: 

#php #symfony 

YuccaPrerenderBundle: Symfony2 Bundle to Use Prerender.io

Yucca/PrerenderBundle

Backbone, EmberJS, Angular and so more are your daily basis ? In case of an admin area, that's fine, but on your front office, you might encounter some SEO problems

Thanks to Prerender.io, you now can dynamically render your JavaScript pages in your server using PhantomJS.

This bundle is largely inspired by bakura10 work on zfr-prerender

Installation

Install the module by typing (or add it to your composer.json file):

$ php composer.phar require "yucca/prerender-bundle" "0.1.*@dev"

Register the bundle in app/AppKernel.php:

// app/AppKernel.php
public function registerBundles()
{
    return array(
        // ...
        new Yucca\PrerenderBundle\YuccaPrerenderBundle(),
    );
}

Enable the bundle's configuration in app/config/config.yml:

# app/config/config.yml
yucca_prerender: ~

Documentation

How it works

1. Check to make sure we should show a prerendered page
   1. Check if the request is from a crawler (agent string)
   2. Check to make sure we aren't requesting a resource (js, css, etc...)
   3. (optional) Check to make sure the url is in the whitelist
   4. (optional) Check to make sure the url isn't in the blacklist
2. Make a GET request to the prerender service (PhantomJS server) for the page's prerendered HTML
3. Return that HTML to the crawler

Customization

This bundle comes with a sane default, extracted from prerender-node middleware, but you can easily customize it:

#app/config/config.yml
yucca_prerender:
    ....

Prerender URL

By default, YuccaPrerenderBundle uses the Prerender.io service deployed at http://prerender.herokuapp.com. However, you may want to deploy it on your own server. To that extent, you can customize YuccaPrerenderBundle to use your server using the following configuration:

#app/config/config.yml
yucca_prerender:
    backend_url: http://localhost:3000

With this config, here is how YuccaPrerender will proxy the "https://google.com" request:

GET http://localhost:3000/https://google.com

Crawler user-agents

YuccaPrerender decides to pre-render based on the User-Agent string to check if a request comes from a bot or not. By default, those user agents are registered: 'baiduspider', 'facebookexternalhit', 'twitterbot'. Googlebot, Yahoo, and Bingbot should not be in this list because we support escaped_fragment instead of checking user agent for those crawlers. Your site must have to understand the '#!' ajax url notation.

You can add other User-Agent string to evaluate using this sample configuration:

#app/config/config.yml
yucca_prerender:
    crawler_user_agents: ['yandex', 'msnbot']

Ignored extensions

YuccaPrerender is configured by default to ignore all the requests for resources with those extensions: .js, .css, .less, .png, .jpg, .jpeg, .gif, .pdf, .doc, .txt, .zip, .mp3, .rar, .exe, .wmv, .doc, .avi, .ppt, .mpg, .mpeg, .tif, .wav, .mov, .psd, .ai, .xls, .mp4, .m4a, .swf, .dat, .dmg, .iso, .flv, .m4v, .torrent . Those are never pre-rendered.

You can add your own extensions using this sample configuration:

#app/config/config.yml
yucca_prerender:
    ignored_extensions: ['.less', '.pdf']

Whitelist

Whitelist a single url path or multiple url paths. Compares using regex, so be specific when possible. If a whitelist is supplied, only url's containing a whitelist path will be prerendered.

Here is a sample configuration that only pre-render URLs that contains "/users/":

#app/config/config.yml
yucca_prerender:
    whitelist_urls: ['/users/*']

Note: remember to specify URL here and not Symfony2 route names.

Blacklist

Blacklist a single url path or multiple url paths. Compares using regex, so be specific when possible. If a blacklist is supplied, all url's will be pre-rendered except ones containing a blacklist part. Please note that if the referer is part of the blacklist, it won't be pre-rendered too.

Here is a sample configuration that prerender all URLs excepting the ones that contains "/users/":

#app/config/config.yml
yucca_prerender:
    blacklist_urls: ['/users/*']

Note: remember to specify URL here and not Symfony22 route names.

Testing

If you want to make sure your pages are rendering correctly:

1. Open the Developer Tools in Chrome (Cmd + Atl + J)
2. Click the Settings gear in the bottom right corner.
3. Click "Overrides" on the left side of the settings panel.
4. Check the "User Agent" checkbox.
5. Choose "Other..." from the User Agent dropdown.
6. Type googlebot into the input box.
7. Refresh the page (make sure to keep the developer tools open).

Thanks

• Thanks to bakura10 for the Zend Framework version.
• Thanks to Romain Boyer to make me discover prerender.io
• Thanks to the prerender team and all JS MVC developpers

Author: rjanot
Source Code: https://github.com/rjanot/YuccaPrerenderBundle 
License: MIT License

#php #symfony