CODEWITHSUNDEEP
ruby-on-railsrubycontroller
David Clavijo
David Clavijo

Reputation: 387

How to make a class-based controller in Rails?

I am trying to create a generic controller in Rails, to approach a similar functionality than the one offered in class-based views in Django. It would mean that just by making a subclass of this controller you would acquired all the methods generated by default with scaffold.

The code generated by scaffold in Rails is equal except for the name of the resource. Given an small example and based on the code generated by scaffold:

    class ResourceController < ApplicationController
        before_action :set_#{resource_under_scored}, only: [:show, :edit, :update, :destroy]

        def index
            @#{resource_under_score_pluralized} = #{resource_model}.all
        end
    ...

Given that definition I could write the following controller for resource big shoe:

    class BigShoesController < ResourceController

    end

Which would imply in the following code auto generated at runtime:

    class BigShoesController < ApplicationController
        before_action :set_big_shoe, only: [:show, :edit, :update, :destroy]

        def index
            @big_shoes = BigShoe.all
        end

I still need to learn a lot of metaprogramming to achieve this but I though that there are more people who has wanted to acquired the same result. But I have not found the proper question.

How would you accomplish this ? I am looking for a way to implement the class, to see how it would be made to generated code based on variables. It is preferred this answer than a gem which will make the work.

Upvotes: 1

Views: 371

Answers (1)

Sergio Tulentsev
Sergio Tulentsev

Reputation: 230336

It seems that you want InheritedResources: https://github.com/josevalim/inherited_resources.

It implements all the basic CRUD stuff. Example:

class ProjectsController < InheritedResources::Base
end

This controller has index, show, create, update and other methods, implemented in a standard manner. There are some possibilities for customization, see the readme file.

Upvotes: 2

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