Merge pull request #2 from abdulhamiid/processing-data-in-models

Processing data in models

app/models/comment.rb

@@ -0,0 +1,9 @@
+class Comment < ApplicationRecord
+  belongs_to :author, class_name: 'User'
+  belongs_to :post
+  after_save :update_comments_counter
+
+  def update_comments_counter
+    post.increment!(:comments_counter)
+  end
+end

app/models/like.rb

@@ -0,0 +1,9 @@
+class Like < ApplicationRecord
+  belongs_to :author, class_name: 'User'
+  belongs_to :post
+  after_save :update_likes_counter
+
+  def update_likes_counter
+    post.increment!(:likes_counter)
+  end
+end

app/models/post.rb

@@ -0,0 +1,14 @@
+class Post < ApplicationRecord
+  belongs_to :author, class_name: 'User'
+  has_many :likes
+  has_many :comments
+  after_save :update_posts_counter
+
+  def update_posts_counter
+    author.increment!(:posts_counter)
+  end
+
+  def five_recent_comments
+    comments.order('created_at Desc').last(5)
+  end
+end

app/models/user.rb

@@ -0,0 +1,9 @@
+class User < ApplicationRecord
+  has_many :posts, foreign_key: 'author_id'
+  has_many :comments, foreign_key: 'author_id'
+  has_many :likes, foreign_key: 'author_id'
+
+  def recent_posts
+    posts.order('created_at Desc').last(3)
+  end
+end

db/migrate/20220924011718_rename_column_in_posts.rb

@@ -0,0 +1,5 @@
+class RenameColumnInPosts < ActiveRecord::Migration[7.0]
+  def change
+    rename_column :posts, :user_id, :author_id
+  end
+end

db/migrate/20220924011808_rename_column_in_comments.rb

@@ -0,0 +1,5 @@
+class RenameColumnInComments < ActiveRecord::Migration[7.0]
+  def change
+    rename_column :comments, :user_id, :author_id
+  end
+end

db/migrate/20220924011859_rename_column_in_likes.rb

@@ -0,0 +1,5 @@
+class RenameColumnInLikes < ActiveRecord::Migration[7.0]
+  def change
+    rename_column :likes, :user_id, :author_id
+  end
+end