How to Create Custom Form Validator in Angular 8 Application?

Here, I will guide you how to create custom form validator in Angular 8 Application. You will learn to Angular 8 custom validator example step by step. We can simply write custom validation in Angular 8 for reactive form.

Custom validation is a most important thing in programming language. Most of the cases and most of the project you need to create some custom validation so you can reuse it and also write septate code on file then you can use as like pre define validation.

So if you also need to create custom validator in your angular application then follow bellow step to create basic Angular 8 reactive form custom validator.

We will create new custom validator for not contain space on input field. we will not allow space on username. so let’s see now it works

Step 1: Install Angular App

Here, in this step you need to create new ng app for this demo. if you have already created then don’t create new Angular 8 app.

ng new my-custom-val-app

Step 2: Import FormsModule

If you want to create form in angular app then you need to import FormsModule from @angular/forms library. so let’s add following code to app.module.ts file.

src/app/app.module.ts

import { BrowserModule } from '@angular/platform-browser';

import { NgModule } from '@angular/core';

import { FormsModule, ReactiveFormsModule } from '@angular/forms';

   

import { AppComponent } from './app.component';

   

@NgModule({

  declarations: [

    AppComponent

  ],

  imports: [

    BrowserModule,

    FormsModule,

    ReactiveFormsModule

  ],

  providers: [],

  bootstrap: [AppComponent]

})

export class AppModule { }

Step 3: Form with ngModel

In this step, we will write code of html form with ngModel. so add following code to app.component.html file.

src/app/app.component.html

<h1>How to Create Custom Validators in Angular 8 - ItSolutionStuff.com</h1>

    

<form [formGroup]="form" (ngSubmit)="submit()">

   

    <div class="form-group">

        <label for="username">Username</label>

        <input 

            formControlName="username"

            id="username" 

            type="text" 

            class="form-control">

        <div *ngIf="f.username.touched && f.username.invalid" class="alert alert-danger">

            <div *ngIf="f.username.errors.required">Username is required.</div>

            <div *ngIf="f.username.errors.minlength">Username should be 3 character.</div>

            <div *ngIf="f.username.errors.cannotContainSpace">Username can not contain space.</div>

        </div>

    </div>

     

    <div class="form-group">

        <label for="password">Password</label>

        <input 

            formControlName="password"

            id="password" 

            type="password" 

            class="form-control">

        <div *ngIf="f.password.touched && f.password.invalid" class="alert alert-danger">

            <div *ngIf="f.password.errors.required">Password is required.</div>

        </div>

    </div>

    

    <button class="btn btn-primary" type="submit">Submit</button>

</form>

Step 4: updated Ts File

In ts file. we will write submit() and get all input fields values. so let’s add following code to app.component.ts file.

src/app/app.component.ts

import { Component } from '@angular/core';

import { FormGroup, FormControl, Validators} from '@angular/forms';

import { UsernameValidator } from './username.validator';

  

@Component({

  selector: 'app-root',

  templateUrl: './app.component.html',

  styleUrls: ['./app.component.css']

})

export class AppComponent {

  form = new FormGroup({

    username: new FormControl('', [Validators.required, Validators.minLength(3), UsernameValidator.cannotContainSpace]),

    password: new FormControl('', Validators.required)

  });

   

  get f(){

    return this.form.controls;

  }

    

  submit(){

    console.log(this.form.value);

  }

}

Step 5: Create Custom Validation File

You need to create custom ‘username.validator.ts’ file and write code as bellow:

src/app/username.validator.ts

import { AbstractControl, ValidationErrors } from '@angular/forms';

  

export class UsernameValidator {

    static cannotContainSpace(control: AbstractControl) : ValidationErrors | null {

        if((control.value as string).indexOf(' ') >= 0){

            return {cannotContainSpace: true}

        }

  

        return null;

    }

}

Now you can run your application using following command:

ng serve

I hope it can help you…

Originally published by Hardik Savani at https://www.itsolutionstuff.com

#Angular #JavaScript #WebDev

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How to Create Custom Form Validator in Angular 8 Application?

Yogi Gurjar

1600308055

Laravel 8 Form Validation Tutorial

Laravel 8 form validation example. In this tutorial, i will show you how to submit form with validation in laravel 8.

And you will learn how to store form data in laravel 8. Also validate form data before store to db.

How to Validate Form Data in Laravel 8

  1. Step 1 – Install Laravel 8 Application
  2. Step 2 – Configuring Database using Env File
  3. Step 3 – Create Model & Migration File For Form
  4. Step 4 – Create Routes
  5. Step 5 – Creating Controller
  6. Step 6 – Create Blade File For Form
  7. Step 7 – Start Development Server
  8. Step 8 – Run Laravel 8 Form Validation App On Browser

https://laratutorials.com/laravel-8-form-validation-example-tutorial/

#laravel 8 form validation #laravel 8 form validation tutorial #laravel 8 form validation - google search #how to validate form data in laravel 8 #form validation in laravel 8

Easter  Deckow

Easter Deckow

1655630160

PyTumblr: A Python Tumblr API v2 Client

PyTumblr

Installation

Install via pip:

$ pip install pytumblr

Install from source:

$ git clone https://github.com/tumblr/pytumblr.git
$ cd pytumblr
$ python setup.py install

Usage

Create a client

A pytumblr.TumblrRestClient is the object you'll make all of your calls to the Tumblr API through. Creating one is this easy:

client = pytumblr.TumblrRestClient(
    '<consumer_key>',
    '<consumer_secret>',
    '<oauth_token>',
    '<oauth_secret>',
)

client.info() # Grabs the current user information

Two easy ways to get your credentials to are:

  1. The built-in interactive_console.py tool (if you already have a consumer key & secret)
  2. The Tumblr API console at https://api.tumblr.com/console
  3. Get sample login code at https://api.tumblr.com/console/calls/user/info

Supported Methods

User Methods

client.info() # get information about the authenticating user
client.dashboard() # get the dashboard for the authenticating user
client.likes() # get the likes for the authenticating user
client.following() # get the blogs followed by the authenticating user

client.follow('codingjester.tumblr.com') # follow a blog
client.unfollow('codingjester.tumblr.com') # unfollow a blog

client.like(id, reblogkey) # like a post
client.unlike(id, reblogkey) # unlike a post

Blog Methods

client.blog_info(blogName) # get information about a blog
client.posts(blogName, **params) # get posts for a blog
client.avatar(blogName) # get the avatar for a blog
client.blog_likes(blogName) # get the likes on a blog
client.followers(blogName) # get the followers of a blog
client.blog_following(blogName) # get the publicly exposed blogs that [blogName] follows
client.queue(blogName) # get the queue for a given blog
client.submission(blogName) # get the submissions for a given blog

Post Methods

Creating posts

PyTumblr lets you create all of the various types that Tumblr supports. When using these types there are a few defaults that are able to be used with any post type.

The default supported types are described below.

  • state - a string, the state of the post. Supported types are published, draft, queue, private
  • tags - a list, a list of strings that you want tagged on the post. eg: ["testing", "magic", "1"]
  • tweet - a string, the string of the customized tweet you want. eg: "Man I love my mega awesome post!"
  • date - a string, the customized GMT that you want
  • format - a string, the format that your post is in. Support types are html or markdown
  • slug - a string, the slug for the url of the post you want

We'll show examples throughout of these default examples while showcasing all the specific post types.

Creating a photo post

Creating a photo post supports a bunch of different options plus the described default options * caption - a string, the user supplied caption * link - a string, the "click-through" url for the photo * source - a string, the url for the photo you want to use (use this or the data parameter) * data - a list or string, a list of filepaths or a single file path for multipart file upload

#Creates a photo post using a source URL
client.create_photo(blogName, state="published", tags=["testing", "ok"],
                    source="https://68.media.tumblr.com/b965fbb2e501610a29d80ffb6fb3e1ad/tumblr_n55vdeTse11rn1906o1_500.jpg")

#Creates a photo post using a local filepath
client.create_photo(blogName, state="queue", tags=["testing", "ok"],
                    tweet="Woah this is an incredible sweet post [URL]",
                    data="/Users/johnb/path/to/my/image.jpg")

#Creates a photoset post using several local filepaths
client.create_photo(blogName, state="draft", tags=["jb is cool"], format="markdown",
                    data=["/Users/johnb/path/to/my/image.jpg", "/Users/johnb/Pictures/kittens.jpg"],
                    caption="## Mega sweet kittens")

Creating a text post

Creating a text post supports the same options as default and just a two other parameters * title - a string, the optional title for the post. Supports markdown or html * body - a string, the body of the of the post. Supports markdown or html

#Creating a text post
client.create_text(blogName, state="published", slug="testing-text-posts", title="Testing", body="testing1 2 3 4")

Creating a quote post

Creating a quote post supports the same options as default and two other parameter * quote - a string, the full text of the qote. Supports markdown or html * source - a string, the cited source. HTML supported

#Creating a quote post
client.create_quote(blogName, state="queue", quote="I am the Walrus", source="Ringo")

Creating a link post

  • title - a string, the title of post that you want. Supports HTML entities.
  • url - a string, the url that you want to create a link post for.
  • description - a string, the desciption of the link that you have
#Create a link post
client.create_link(blogName, title="I like to search things, you should too.", url="https://duckduckgo.com",
                   description="Search is pretty cool when a duck does it.")

Creating a chat post

Creating a chat post supports the same options as default and two other parameters * title - a string, the title of the chat post * conversation - a string, the text of the conversation/chat, with diablog labels (no html)

#Create a chat post
chat = """John: Testing can be fun!
Renee: Testing is tedious and so are you.
John: Aw.
"""
client.create_chat(blogName, title="Renee just doesn't understand.", conversation=chat, tags=["renee", "testing"])

Creating an audio post

Creating an audio post allows for all default options and a has 3 other parameters. The only thing to keep in mind while dealing with audio posts is to make sure that you use the external_url parameter or data. You cannot use both at the same time. * caption - a string, the caption for your post * external_url - a string, the url of the site that hosts the audio file * data - a string, the filepath of the audio file you want to upload to Tumblr

#Creating an audio file
client.create_audio(blogName, caption="Rock out.", data="/Users/johnb/Music/my/new/sweet/album.mp3")

#lets use soundcloud!
client.create_audio(blogName, caption="Mega rock out.", external_url="https://soundcloud.com/skrillex/sets/recess")

Creating a video post

Creating a video post allows for all default options and has three other options. Like the other post types, it has some restrictions. You cannot use the embed and data parameters at the same time. * caption - a string, the caption for your post * embed - a string, the HTML embed code for the video * data - a string, the path of the file you want to upload

#Creating an upload from YouTube
client.create_video(blogName, caption="Jon Snow. Mega ridiculous sword.",
                    embed="http://www.youtube.com/watch?v=40pUYLacrj4")

#Creating a video post from local file
client.create_video(blogName, caption="testing", data="/Users/johnb/testing/ok/blah.mov")

Editing a post

Updating a post requires you knowing what type a post you're updating. You'll be able to supply to the post any of the options given above for updates.

client.edit_post(blogName, id=post_id, type="text", title="Updated")
client.edit_post(blogName, id=post_id, type="photo", data="/Users/johnb/mega/awesome.jpg")

Reblogging a Post

Reblogging a post just requires knowing the post id and the reblog key, which is supplied in the JSON of any post object.

client.reblog(blogName, id=125356, reblog_key="reblog_key")

Deleting a post

Deleting just requires that you own the post and have the post id

client.delete_post(blogName, 123456) # Deletes your post :(

A note on tags: When passing tags, as params, please pass them as a list (not a comma-separated string):

client.create_text(blogName, tags=['hello', 'world'], ...)

Getting notes for a post

In order to get the notes for a post, you need to have the post id and the blog that it is on.

data = client.notes(blogName, id='123456')

The results include a timestamp you can use to make future calls.

data = client.notes(blogName, id='123456', before_timestamp=data["_links"]["next"]["query_params"]["before_timestamp"])

Tagged Methods

# get posts with a given tag
client.tagged(tag, **params)

Using the interactive console

This client comes with a nice interactive console to run you through the OAuth process, grab your tokens (and store them for future use).

You'll need pyyaml installed to run it, but then it's just:

$ python interactive-console.py

and away you go! Tokens are stored in ~/.tumblr and are also shared by other Tumblr API clients like the Ruby client.

Running tests

The tests (and coverage reports) are run with nose, like this:

python setup.py test

Author: tumblr
Source Code: https://github.com/tumblr/pytumblr
License: Apache-2.0 license

#python #api 

Laravel 8 Form Validation Example

In this tutorial we will see laravel 8 form validation example, form validation in laravel is very common functionalities and it is use in each and every website to validate form field.

Here, We will use has function in session to check error message in laravel 8. using this example you can check simple form validation as well as you can create your own custom validation in laravel 8.

Laravel 8 Form Validation Example

https://websolutionstuff.com/post/laravel-8-form-validation-example


Read Also : Laravel 8 CRUD Operation Example

https://websolutionstuff.com/post/laravel-8-crud-operation-example

#laravel 8 form validation example #form validation #how to validate form in laravel 8 #form validation in laravel #laravel #laravel8

I am Developer

1608866530

Angular 11 Reactive Forms Validation Tutorial

Reactive form validation in Angular 11 app. In this tutorial, i will show you how to use reactive form validation in angular 11 app.

As well as, and you will learn how use reactive form validation in angular 11. And also use reactive form with formGroup for validation in angular 11 app.

Reactive Form Validation In Angular 11
Step 1 – Create New Angular App
Step 2 – Import Form Module
Step 3 – Add Code on View File
Step 4 – Use Component ts File
Step 5 – Start Angular App

https://www.tutsmake.com/angular-11-reactive-forms-validation-tutorial-example/

#reactive form validation in angular 11 #angular 11/10/9/8/7 reactive forms validation example #angular 11 form validation example

Yogi Gurjar

1600307723

Laravel 8 Form Example Tutorial - Complete Guide

Laravel 8 form example. In this tutorial, i would love to show you how to create form in laravel. And how to insert data into database using form in laravel 8.

How to Submit Form Data into Database in Laravel 8

  1. Step 1 – Install Laravel 8 Application
  2. Step 2 – Configuring Database using Env File
  3. Step 3 – Create Model & Migration File For Add Blog Post Form
  4. Step 4 – Create Routes
  5. Step 5 – Creating Controller
  6. Step 6 – Create Blade File For Add Blog Post Form
  7. Step 7 – Start Development Server
  8. Step 8 – Run Laravel 8 Form App On Browser

https://laratutorials.com/laravel-8-form-example-tutorial/

#insert form data into database using laravel #laravel bootstrap form #laravel post forms #laravel 8 form tutorial #laravel 8 form example #laravel 8 form submit tutorial