I have this controller that I call via Ajax, where I update the likes of a post.

I have two methods in the user model:

* `already_like_post?`: Where I pass the posted ID and return true or false if the post is already liked.
* `dislike_post`: Delete the user like for given post.

<!--- --->

    class LikesController < ApplicationController
        def create
            if !current_user.already_liked_post? params[:post_id]
                like = Like. new user: current_user, post_id: params[:post_id]
                if !like.save
                    render json: like.errors
                end
            else
               current_user.dislike_post params[:post_id]
            end
            amount_of_likes = Post.find(params[:post_id]).likes.count
            render json:{status:"success",likes: amount_of_likes}
        end
    end

These are the methods in the user model:

	def already_liked_post?(post_id)
		self.likes.where(post_id: post_id).size == 1
	end

	def dislike_post(post_id)
		self.likes.find_by(post_id: post_id).destroy
	end

Can you give a review of this? I don't know if this looks good or if it is the Rails way.