Adding a route for a controller action

Question

I am implementing a like system in my rails app using David Celis gem called Recommendable. I've gotten everything to work in the console but I can't get the right routes and I'm getting the "No route matches [GET] "/categories/1/posts/1/like" error.

I have the following in my models:

class Category < ActiveRecord::Base
  has_many :posts, :dependent => :destroy
  extend FriendlyId
  friendly_id :name, use: :slugged
end

class Post < ActiveRecord::Base
  belongs_to :category
end

In my Post Controller I have:

class PostsController < ApplicationController
  before_filter :authenticate_user!
  before_filter :get_category
  def like
    @post = Post.find(params[:id])
    respond_to do |format|
      if current_user.like @post
      else
         flash[:error] = "Something went wrong! Please try again."
         redirect_to show_post_path(@category, @post)
      end
    end
  end
end

In my routes I have:

resources :categories do
    resources :posts do
      put :like, :on => :member
    end
end
match 'categories/:category_id/posts/:id', :to => 'posts#show', :as => 'show_post'

Can someone please point at my errors? I can get the PUT to work but I dont know where the GET error is coming from as I am trying to redirect back to the post if an error occurs when the user like's a certain post. Thank you in advance.

EDIT:

In my view I have:

- title "#{@post.class}"
%p#notice= notice

%p
  %b Title:
  = @post.title
%p
  %b Description:
  = @post.description
%p
  %b Likes:
  = @post.liked_by.count

= link_to 'Edit', edit_category_post_path(@post)
\|
= link_to 'Back', category_posts_path
\|
= link_to 'Like', like_category_post_path(@post)

Answer 1

Replace:

= link_to 'Like', like_category_post_path(@post)

with:

= link_to 'Like', like_category_post_path(@category, @post), method: :put

Or, as I like it:

= link_to 'Like', [@category, @post], method: :put

I think your like has to be:

def like
  @post = Post.find(params[:id])
  respond_to do |format|
    format.html do
      if current_user.like @post
        flash[:notice] = "It's ok, you liked it!"
        redirect_to :back
      else
         flash[:error] = "Something went wrong! Please try again."
         redirect_to show_post_path(@category, @post)
      end
    end
  end
end