无法在API控制器中自动加载常量

Question

I'm trying to setup a RoR API but I'm hitting a few roadbump along the way. After tiresome coding to get the database setup right I'm hitting an error that doesn't quite make sense to me (I'm new to RoR)

Unable to autoload constant Api::V1::SubmissionsController, expected ./app/controllers/api/v1/submissions_controller.rb to define it

I'm not quite sure what this error means and my interwebs searches are coming up empty on a clear answer. I'm hoping any of you can help me here.

Routes

Rails.application.routes.draw do
 namespace :api, :defaults => {:format => :json} do
   namespace :v1 do
     get "/submissions", to: "submissions#index"
   end
 end
end

submission.rb

class Submission < ActiveRecord::Base

end

submissions_controller.rb

class API::V1::SubmissionsController < ApplicationController
  def index
   @submissions = Submission.all
   render json: @submissions, status: :ok
  end
end

Answer 1

Your file contains:

class API::V1::SubmissionsController < ApplicationController

Rails expects:

class Api::V1::SubmissionsController < ApplicationController

Answer 2

What does your folder structure look like for app/controllers & app/views? Depending on how these files were generated, by "rails generate" or manually created, if you namespace, the folder structure has to match in controllers and views directories.

app/controllers/api/v1 app/views/api/v1