Class: CreateBookmarks

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

Overview

CreateBookmarks class

This class defines the create bookmarks migration in bookmark system

Instance Method Summary collapse

Instance Method Details

#change ⇒ Object

Changes the database



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

def change
  ###
  # Bookmarks table creation
  ###
  create_table :bookmarks do |t|
    ###
    # Bookmarkee id field and bookmarkee type field definition
    ###
    t.references :bookmarkee, polymorphic: true

    ###
    # Bookmarker id fiel and bookmarker type field definition
    ###
    t.references :bookmarker, polymorphic: true

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

  ###
  # Bookmarks table bookmarkee id field and bookmarkee type field index addition
  ###
  add_index :bookmarks, [:bookmarkee_id, :bookmarkee_type], name: "bookmarks_bookmarkee_idx"

  ###
  # Bookmarks table bookmarker id field and bookmarker type field index addition
  ###
  add_index :bookmarks, [:bookmarker_id, :bookmarker_type], name: "bookmarks_bookmarker_idx"

  ###
  # Bookmarks table bookmarkee id field and bookmarkee type field and bookmarker id field and bookmarker type field unique index addition
  ###
  add_index :bookmarks, [:bookmarkee_id, :bookmarkee_type, :bookmarker_id, :bookmarker_type], name: "bookmarks_bookmarkee_bookmarker_idx", unique: true
end