CODEWITHSUNDEEP
ruby-on-railsrubyapi
RowanX
RowanX

Reputation: 101

uninitialized constant Api

I am still a beginner concerning ruby on rails and I am trying to create a simple API but I am facing this error :"uninitialized constant Api"

ideas_controller.rb 

module Api
 module V1
  class ItemsController < BaseController
    def index
     @ideas = Idea.all
     render json: @ideas
    end
  end
 end
end

routes.db

Rails.application.routes.draw do
  namespace :api do
    namespace :v1 do
      resources :ideas  
    end
  end
end

application_controller.rb

   class ApplicationController < ActionController
 protect_from_forgery with: :null_session

end

base_controller.rb

   module Api
 module V1
class BaseController < ApplicationController
  respond_to :json
end
end

The project's directories:

project tree

The server's error: enter image description here

I have also tried this approach and changed the project's structure to : Directorie's updated

Also, I have enabled : config.eager_load = true After that I got the following error:

`block in load_missing_constant': uninitialized constant Api::V1::BaseController (NameError)

Upvotes: 6

Views: 13494

Answers (3)

Daniyal Basit Khan
Daniyal Basit Khan

Reputation: 286

Try this in your ideas controller

module Api
 module V1
  class IdeasController < Api::V1::BaseController
   def index
    @ideas = Idea.all
    render json: @ideas
   end
  end
 end
end

And define your base controller in the following way

class Api::V1::BaseController < ApplicationController
 respond_to :json
end

Upvotes: 0

Peter Zhu
Peter Zhu

Reputation: 461

If you're in the development environment, eager loading is turned off by default, which can be fixed by turning on eager load (change to config.eager_load = true in config/development.rb). Eager loading will allow the whole Rails app to be loaded when the server starts (which is slightly slower), but will fix your problem since that file will be loaded.

Upvotes: 3

Amro Abdalla
Amro Abdalla

Reputation: 584

This error because module Api is not defined before, I guess if you made like this it gonna work. from an answer here

module Api
 module V1
  class IdeasController < ApplicationController
    def index
     @ideas = Idea.all
     render json: @ideas
    end
  end
 end
end

another solution could be like this:

module Api
 module V1
 end
end
class Api::V1::IdeasController < ApplicationController
  def index
   @ideas = Idea.all
   render json: @ideas
  end
end

hope it helps.

Upvotes: 0

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