level_1_challenge_1.rb

# Objective

Refactor the Users#follow action and move code into the User model.  Create the follow method in the User model.

# Before

class UsersController < ApplicationController
  def follow
    @user = User.find(params[:id])
    
    if current_user.followings.where(:followed_user_id => @user.id).present?
      redirect_to @user
    else
      current_user.followings.create(:followed_user => @user)
      redirect_to root_url
    end

  end
end

class User < ActiveRecord::Base
  has_many :followings
  
  # This method should check to see if a user is already being followed.
  # Create the model if not, otherwise return false
  # def follow(user)
end 

# After

class UsersController < ApplicationController
  def follow
    @user = User.find(params[:id])
    
    if current_user.follow(@user)
      redirect_to root_url
    else
      redirect_to @user
    end
  end
end

class User < ActiveRecord::Base
  has_many :followings
  
  def follow(user)
    unless followings.where(:followed_user_id => @user.id).present?
      followings.create(:followed_user => @user)
    else
      false
    end
  end
end