Rails Comments ID => nil

Question

I have a comments table and my Users comment on a movie. A comment belongs_to :movie and a movie has_many :comments

My problem is that when I create a new comment, this field has to be there <%= f.text_field :movie_id %> , and if I remove it, I get

No route matches {:action=>"show", :controller=>"movies", :id=>nil}

This is the absolute path to create a new comment http://localhost:3000/movies/:movie_id/comments/new

I've checked the action in the movies controller and can't see anything. I've also played with the create action in the Comments controller but still nothing.

Having this field in my view can be quite confusing to the user. Does anyone have a solution for this?

This is my *comments_controller.rb*

class CommentsController < ApplicationController
  # GET /comments
  # GET /comments.json
  before_filter :load_movie
  before_filter :authenticate_user!, only: [:create,:destroy,:edit,:destroy]

  ...   

  # GET /comments/new
  # GET /comments/new.json
  def new
    @movie = Movie.find(params[:movie_id])
    @comment = @movie.comments.new 
    @search = Movie.search(params[:q])

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @comment }
    end
  end


  # POST /comments
  # POST /comments.json
  def create 
    @comment = Comment.new(params[:comment]) 
    @comment.user_id = current_user.id 
    @search = Movie.search(params[:q]) 

   respond_to do |format| 
    if @comment.save 
      @movie = @comment.movie 
      format.html { redirect_to movie_path(@movie), notice: "Comment created" } 
      format.json { render json: @comment, status: :created, location: @comment } 
    else 
      format.html { render action: "new" } 
      format.json { render json: @comment.errors, status: :unprocessable_entity } 
    end 
  end 
end

private
  def load_movie
    @movie = Movie.find_by_id(params[:movie_id])
  end
end

routes.rb

AppName::Application.routes.draw do

  resources :comments

  resources :movies do
      resources :comments, only: [:create,:destroy,:edit,:destroy,:new]
      member do 
        get 'comments'
      end
  end
end

*_form.html.erb*

<%= form_for(@comment) do |f| %>
  <%= f.error_notification %>

  <div class="form-inputs">
    <%= f.text_field :subject %>
    <%= f.text_area :body %>
    <%= f.text_field :movie_id %>
  </div>

  <div class="form-actions">
<%= f.submit "Sumbit Review" %>
  </div>
<% end %>

Answer 1

resources :movies do
  resources :comments, only: [:create,:destroy,:edit,:destroy,:new]
end

will give you url like:

../movies/:movie_id/comments/new

remove that text_field with movie_id as this is not safe.

in controller create action:

@movie = Movie.find(params[:movie_id])
@comment = @movie.comments.new(params[:comment]) 
@comment.user_id = current_user.id

not sure why you need:

member do 
  get 'comments'
end

---

Form

when using nested resource you'll need to build you form like this:

<%= form_for ([@movie, @comment]) do |f| %>
  <%= f.some_input %>
<% end %>