original_likes_controller.rb

module Api
  class LikesController < ApplicationController
    def update
      @user = User.find(params['user_id'])
      @post = Post.find(params['post_id'])
      
      like = @post.likes.find_or_initialize_by(user: @user)

      if like.persisted?
        like.destroy!
        render json: { isLiked: false }
      else
        like.save!
        render json: { isLiked: true }
      end
    end
  end
end