Class: CreateLikes

Inherits:
Object
  • Object
show all
Defined in:
lib/generators/like_system/templates/migration.rb

Overview

CreateLikes class

This class defines the create likes migration in like system

Instance Method Summary collapse

Instance Method Details

#change ⇒ Object

Changes the database



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# File 'lib/generators/like_system/templates/migration.rb', line 10

def change
  ###
  # Likes table creation
  ###
  create_table :likes do |t|
    ###
    # Likee id field and likee type field definition
    ###
    t.references :likee, polymorphic: true

    ###
    # Liker id fiel and liker type field definition
    ###
    t.references :liker, polymorphic: true

    ###
    # Timestamps fields definition
    ###
    t.timestamps null: false
  end

  ###
  # Likes table likee id field and likee type field index addition
  ###
  add_index :likes, [:likee_id, :likee_type], name: "likes_likee_idx"

  ###
  # Likes table liker id field and liker type field index addition
  ###
  add_index :likes, [:liker_id, :liker_type], name: "likes_liker_idx"

  ###
  # Likes table likee id field and likee type field and liker id field and liker type field unique index addition
  ###
  add_index :likes, [:likee_id, :likee_type, :liker_id, :liker_type], name: "likes_likee_liker_idx", unique: true
end