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Reform: Form Objects Decoupled From Models In Ruby

Reform

Form objects decoupled from your models.

Reform gives you a form object with validations and nested setup of models. It is completely framework-agnostic and doesn't care about your database.

Although reform can be used in any Ruby framework, it comes with Rails support, works with simple_form and other form gems, allows nesting forms to implement has_one and has_many relationships, can compose a form from multiple objects and gives you coercion.

Full Documentation

Reform is part of the Trailblazer framework. Full documentation is available on the project site.

Reform 2.2

Temporary note: Reform 2.2 does not automatically load Rails files anymore (e.g. ActiveModel::Validations). You need the reform-rails gem, see Installation.

Defining Forms

Forms are defined in separate classes. Often, these classes partially map to a model.

class AlbumForm < Reform::Form
  property :title
  validates :title, presence: true
end

Fields are declared using ::property. Validations work exactly as you know it from Rails or other frameworks. Note that validations no longer go into the model.

The API

Forms have a ridiculously simple API with only a handful of public methods.

1. #initialize always requires a model that the form represents.
2. #validate(params) updates the form's fields with the input data (only the form, not the model) and then runs all validations. The return value is the boolean result of the validations.
3. #errors returns validation messages in a classic ActiveModel style.
4. #sync writes form data back to the model. This will only use setter methods on the model(s).
5. #save (optional) will call #save on the model and nested models. Note that this implies a #sync call.
6. #prepopulate! (optional) will run pre-population hooks to "fill out" your form before rendering.

In addition to the main API, forms expose accessors to the defined properties. This is used for rendering or manual operations.

Setup

In your controller or operation you create a form instance and pass in the models you want to work on.

class AlbumsController
  def new
    @form = AlbumForm.new(Album.new)
  end

This will also work as an editing form with an existing album.

def edit
  @form = AlbumForm.new(Album.find(1))
end

Reform will read property values from the model in setup. In our example, the AlbumForm will call album.title to populate the title field.

Rendering Forms

Your @form is now ready to be rendered, either do it yourself or use something like Rails' #form_for, simple_form or formtastic.

= form_for @form do |f|
  = f.input :title

Nested forms and collections can be easily rendered with fields_for, etc. Note that you no longer pass the model to the form builder, but the Reform instance.

Optionally, you might want to use the #prepopulate! method to pre-populate fields and prepare the form for rendering.

Validation

After form submission, you need to validate the input.

class SongsController
  def create
    @form = SongForm.new(Song.new)

    #=> params: {song: {title: "Rio", length: "366"}}

    if @form.validate(params[:song])

The #validate method first updates the values of the form - the underlying model is still treated as immutuable and remains unchanged. It then runs all validations you provided in the form.

It's the only entry point for updating the form. This is per design, as separating writing and validation doesn't make sense for a form.

This allows rendering the form after validate with the data that has been submitted. However, don't get confused, the model's values are still the old, original values and are only changed after a #save or #sync operation.

Syncing Back

After validation, you have two choices: either call #save and let Reform sort out the rest. Or call #sync, which will write all the properties back to the model. In a nested form, this works recursively, of course.

It's then up to you what to do with the updated models - they're still unsaved.

Saving Forms

The easiest way to save the data is to call #save on the form.

if @form.validate(params[:song])
  @form.save  #=> populates album with incoming data
              #   by calling @form.album.title=.
else
  # handle validation errors.
end

This will sync the data to the model and then call album.save.

Sometimes, you need to do saving manually.

Default values

Reform allows default values to be provided for properties.

class AlbumForm < Reform::Form
  property :price_in_cents, default: 9_95
end

Saving Forms Manually

Calling #save with a block will provide a nested hash of the form's properties and values. This does not call #save on the models and allows you to implement the saving yourself.

The block parameter is a nested hash of the form input.

  @form.save do |hash|
    hash      #=> {title: "Greatest Hits"}
    Album.create(hash)
  end

You can always access the form's model. This is helpful when you were using populators to set up objects when validating.

  @form.save do |hash|
    album = @form.model

    album.update_attributes(hash[:album])
  end

Nesting

Reform provides support for nested objects. Let's say the Album model keeps some associations.

class Album < ActiveRecord::Base
  has_one  :artist
  has_many :songs
end

The implementation details do not really matter here, as long as your album exposes readers and writes like Album#artist and Album#songs, this allows you to define nested forms.

class AlbumForm < Reform::Form
  property :title
  validates :title, presence: true

  property :artist do
    property :full_name
    validates :full_name, presence: true
  end

  collection :songs do
    property :name
  end
end

You can also reuse an existing form from elsewhere using :form.

property :artist, form: ArtistForm

Nested Setup

Reform will wrap defined nested objects in their own forms. This happens automatically when instantiating the form.

album.songs #=> [<Song name:"Run To The Hills">]

form = AlbumForm.new(album)
form.songs[0] #=> <SongForm model: <Song name:"Run To The Hills">>
form.songs[0].name #=> "Run To The Hills"

Nested Rendering

When rendering a nested form you can use the form's readers to access the nested forms.

= text_field :title,         @form.title
= text_field "artist[name]", @form.artist.name

Or use something like #fields_for in a Rails environment.

= form_for @form do |f|
  = f.text_field :title

  = f.fields_for :artist do |a|
    = a.text_field :name

Nested Processing

validate will assign values to the nested forms. sync and save work analogue to the non-nested form, just in a recursive way.

The block form of #save would give you the following data.

@form.save do |nested|
  nested #=> {title:  "Greatest Hits",
         #    artist: {name: "Duran Duran"},
         #    songs: [{title: "Hungry Like The Wolf"},
         #            {title: "Last Chance On The Stairways"}]
         #   }
  end

The manual saving with block is not encouraged. You should rather check the Disposable docs to find out how to implement your manual tweak with the official API.

Populating Forms

Very often, you need to give Reform some information how to create or find nested objects when validateing. This directive is called populator and documented here.

Installation

Add this line to your Gemfile:

gem "reform"

Reform works fine with Rails 3.1-5.0. However, inheritance of validations with ActiveModel::Validations is broken in Rails 3.2 and 4.0.

Since Reform 2.2, you have to add the reform-rails gem to your Gemfile to automatically load ActiveModel/Rails files.

gem "reform-rails"

Since Reform 2.0 you need to specify which validation backend you want to use (unless you're in a Rails environment where ActiveModel will be used).

To use ActiveModel (not recommended because very out-dated).

require "reform/form/active_model/validations"
Reform::Form.class_eval do
  include Reform::Form::ActiveModel::Validations
end

To use dry-validation (recommended).

require "reform/form/dry"
Reform::Form.class_eval do
  feature Reform::Form::Dry
end

Put this in an initializer or on top of your script.

Compositions

Reform allows to map multiple models to one form. The complete documentation is here, however, this is how it works.

class AlbumForm < Reform::Form
  include Composition

  property :id,    on: :album
  property :title, on: :album
  property :songs, on: :cd
  property :cd_id, on: :cd, from: :id
end

When initializing a composition, you have to pass a hash that contains the composees.

AlbumForm.new(album: album, cd: CD.find(1))

More

Reform comes many more optional features, like hash fields, coercion, virtual fields, and so on. Check the full documentation here.

Reform is part of the Trailblazer project. Please buy my book to support the development and learn everything about Reform - there's two chapters dedicated to Reform!

Security And Strong_parameters

By explicitly defining the form layout using ::property there is no more need for protecting from unwanted input. strong_parameter or attr_accessible become obsolete. Reform will simply ignore undefined incoming parameters.

This is not Reform 1.x!

Temporary note: This is the README and API for Reform 2. On the public API, only a few tiny things have changed. Here are the Reform 1.2 docs.

Anyway, please upgrade and report problems and do not simply assume that we will magically find out what needs to get fixed. When in trouble, join us on Gitter.

Full documentation for Reform is available online, or support us and grab the Trailblazer book. There is an Upgrading Guide to help you migrate through versions.

Attributions!!!

Great thanks to Blake Education for giving us the freedom and time to develop this project in 2013 while working on their project.

---

Author: trailblazer
Source code: https://github.com/trailblazer/reform
License:  MIT license

#ruby  #ruby-on-rails

Software Developer vs Software Engineer — Differences: Bogus or Real?

Software Developers vs Software Engineers

Personally, it pisses me off. Every time I see an article on this topic, my emotional bank account gets robbed. They are all about SEO. Inappropriate keywords squeezed into tiny sentences just to get better rankings. No intent to entertain or enlighten the reader whatsoever. Sometimes, such articles can even be outright wrong.

And even though the purpose of this blog post can be to generate traffic, I tried to make it more of a meaningful rant than a lifeless academic essay.

So, let’s see how you feel by the time you are done reading this paper.

Without further ado:

Since there are no proper interpretations of both terms, a lot of people use them interchangeably.

However, some companies consider these terms as job titles.

The general “programmer-developer-engineer” trend goes along the lines of:

• A programmer is someone who knows how to code, understands algorithms and can follow instructions. Yet, it doesn’t go further in regards to responsibilities.
• A developer is someone superior to the programmer. Except for coding, they also do design, architecture, and technical documentation of the software component they are building. They might be referred to as leaders, but not necessarily.
• Finally, an engineer implies that you are the real deal. You’ve graduated with a degree, have some tech knowledge, and preferably experience… and you are capable of designing a software system (a combination of software components your peons, the programmers, have built). You’re like an overseer. You can see the bigger picture. And it’s your responsibility to clearly explain that “picture” to your team.

#devops #software development #programming #software engineering #software developer #programmer #software engineer #software engineering career

Purchasing & Replacement Software Solutions | Originscale

With Originscale, you’ve got reliable software providing dynamic inventory insights at your fingertips including raw materials and finished products that help you prevent missed production timelines, sales, avoid stockouts, and free up cash by optimizing operations so you can reinvest in your business.
Read more: https://www.originscale.io/purchasingreplenishment

#purchasing software solutions #purchase order software #purchasing software #free purchasing software #purchase order management software #purchasing software for manufacturing

Custom Software vs Off-the-shelf Software: How to select a better one for your business?

Custom Software or Off-the-shelf software, the question in mind for many business personnel. Read this blog to get help to make the right decision that will benefit your business.
For a business that wants to upgrade and modernize itself with the help of software, a common dilemma it is whether to go for custom-made software or opt for off-the-shelf software. You can find many top software development companies worldwide, but before that all, you should first decide the type of software –an off-the-shelf software or a custom one.
This blog aims to overcome the dilemma and accord some clarity to a business looking to automate its business processes.

#custom software vs off-the-shelf software #custom software development companies #top software development companies #off-the-shelf software development #customized software solution #custom software development

How To Hire Dedicated Software Development Team

We all have been agreeing that we need to take the help of top talent to fulfill the requirements of our complex tasks at some business point. Sometimes, your in-housing team fails to match client’s requirements, or we can say market needs. At that moment, you need to take one step forward and hire dedicated software development team to match the client’s requirements and market trends. Before going ahead, take a look at the dedicated development team model.

When you are going to do a partnership with a software development company, a dedicated software development team is one method. On the other hand, fixed price and time are other models. Every model has its uniqueness, benefits, and drawbacks. Let’s talk about a dedicated development team.

When clients look for a dedicated team for software development, they want to hire a team of developers to fulfill the tasks of the complex project. That team of developers collaborates with the in-housing squad, although they work remotely. They take responsibility for the project and try to make the project successful. They dedicate themselves to match all requirements of the project in the market or the latest trends.

Dedicated software development team - Talents

• Backend and frontend developers
• Project manager
• Business analysts
• DevOps
• UX/UI designers
• Quality assurance engineers

When hiring a development team is a Good Choice?

• When you have some complex project, and the in-housing team is inexperienced.

• When you don’t have a resource of the dedicated web development team to match the complexity of your projects.

• When you want to take your business to the next level in terms of client satisfaction and expertise.

• When you have multiple projects aligned with the same deadlines, a software development dedicated team is an excellent choice to go with.

• When you don’t have enough time to hire a team of developers for your in-house.

• When you expand your business with a dedicated software development team, they take care of your specific needs and reach out to all the possible and desired objectives.

Benefits of outsourcing a dedicated team

Because of the following reasons, you need to hire development teams for your business.

Cost-effectiveness
When looking for a dedicated development team for hire, you do not require to spend your valuable time hiring IT specialists individually and forming a team. You also not needed to build an infrastructure for them. They will work remotely with their resources, so there is no additional cost. They can start working on your project by the time you hire dedicated team, and there is no delay or settlement needed.

Focus on the projec

The software dedicated development team you hire does the work for only your project during the set time period. So, their full focus is solely on your project.
You can also check the work process and get updates regarding your project regularly. This collaboration takes your project to the next level and provides the best satisfaction to the clients.

Flexible approach

A dedicated development team is the best choice for large-scale projects. It gives you one benefit: if you require more developers between the projects or want to cut down your team size, you can do it. Dedicated developers are very flexible; they take any issues and react to get the best output accordingly.

Maximum effect and speed

They understand your business goals and understand the importance of matching deadlines. They keep track of work progress, so they can give you the reports of completed tasks and future outlines if you ask. You will get maximum efficiency and high speed with a dedicated team for software development.

After knowing the advantages of developers outsourcing dedicated teams, we are now going to look at how to hire dedicated software development team.

How to hire dedicated software development team?

Hire a development team for your organization is a stressful task for organizations as you need to focus on several factors. I know it is a crucial task for your organization, but stress, you do not need to think about. A few ways are available to hire a dedicated software development team for your organization, like finding them from Google organic search or B2B portals.

Narrowing down your search, and select partner through:

• Google top 10 result
• B2B portal (Clutch)
• Freelance workplaces (Upwork)
• StackOverflow
• GitHub

How to Set-up, a dedicated software development team?

After choosing your offshore partner, now it’s time to follow the process for setting up your dedicated development team.

Well-defined business objectives are needed.

You need to explain all your business requirements, including the deadline and desired workflow you wanted, development team size, and type of expertise you require.

**Assembling the team **

Individual hiring can take one or more months, but with a dedicated team model, you bring your team to your work within one week.

Talent selection

After finding a dedicated team, selected the best-qualified team for your project with factors like expertise, efficiency, tech skill, English fluency, and other aspects of your project.

Integrating the team

After selecting the team based on your skills requirements, the group joins the project in progress quickly. Now, we can say business owners take the best step to get a business boost soon in the market.

Criteria that you need to look at while hiring a dedicated team.

With this model, you hire a development team and start working on your project like your in-housing team. For making any product successful, you must have to look for the right developers and team members. Here we will look at a few criteria you need to keep in mind while hiring a dedicated development team.

Portfolio: Take note that whether the team you are hiring is proved the portfolio or not

Reviews: Take a look at the reviews of that dedicated team.

Skillset: Make sure the dedicated team matches all the skills you require.

Language: Take note that the dedicated team has a good command of language.

Cost: Make sure the decided price is not beyond your budget.

The number of members: Based on your project deadline, decide the number of developers you require.

Wrapping Up

Being a business person, everyone wants the best for their business. No one wants their business to perform poorly and not be able to fulfill the market requirements. If your business is going in the wrong direction, it is time for you to call a dedicated team to lift your business up.

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