missing required keys: [:like_id] - ruby-on-rails

Question

I can't get a like system working for my Rails discussion forum:
class Like < ActiveRecord::Base
belongs_to :user
belongs_to :comment
end
class Post < ActiveRecord::Base
belongs_to :user
has_many :comments
has_many :likes, through: :comments
end
class Comment < ActiveRecord::Base
belongs_to :post
belongs_to :user
has_many :likes
end
routes.rb:
resources :posts do
resources :comments do
resources :likes do
put "/create", to: "likes#create"
end
end
end
likes_controller.rb:
class LikesController < ApplicationController
def create
#post = Post.find(params[:post_id])
#comment = Comment.find(params[:comment_id])
#like = Like.find(params[:like_id])
#user = current_user.id
Like.create(like_id: #like, post_id: #post, comment_id: #comment, user_id: #user)
respond_to do |format|
format.html { redirect_to post_path(#post) }
end
end
end
rake routes:
post_comment_like_create PUT /posts/:post_id/comments/:comment_id/likes/:like_id/create(.:format) likes#create
post_comment_likes GET /posts/:post_id/comments/:comment_id/likes(.:format) likes#index
POST /posts/:post_id/comments/:comment_id/likes(.:format) likes#create
etc
The problem I keep running into is that it's missing like_id:
No route matches {:action=>"create", :comment_id=>"218", :controller=>"likes", :like_id=>nil, :post_id=>"30"} missing required keys: [:like_id]
What am I doing wrong? I assume most of the code is correct, as the only error it's giving me is a missing ID, I just don't understand how or where to fetch that like_id.
EDIT:
This is the action I'm trying to use:
= link_to post_comment_like_create_path(#post, comment, #like)

Answer 1

The issue is partly in your routes, partly in your controller and partly in the view.
By using the line resources :likes, you are creating routes for the 7 CRUD actions automatically. This means you do not need to manually declare a create action in your routes (which should be a POST rather than PUT). I'd suggest reading the Rails Guide on Routing.
In your controller, you are attempting to create an object called #like by finding a Like based on an ID. But you are creating this for the first time, so there is nothing to find.
In your view, you shouldn't be using a link_to for anything that affects the database but rather a button_to and the path you are using is also part of the problem.
Make the following changes:
routes.rb
resources :posts do
resources :comments do
resources :likes
end
end
likes_controller.rb
class LikesController < ApplicationController
def create
#post = Post.find(params[:post_id])
#comment = Comment.find(params[:comment_id])
#user = current_user.id
Like.create(post_id: #post, comment_id: #comment, user_id: #user)
respond_to do |format|
format.html { redirect_to post_path(#post) }
end
end
end
view
= button_to post_comment_likes_path(#post, comment)
I would suggest you look at the guides around nesting of routes. Nesting this deep can easily become cumbersome.