Class: ActsAsTaggableOnMigration

Inherits:
ActiveRecord::Migration
  • Object
show all
Defined in:
lib/generators/acts_as_taggable_on/migration/templates/active_record/migration.rb

Class Method Summary collapse

Class Method Details

.down ⇒ Object 



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# File 'lib/generators/acts_as_taggable_on/migration/templates/active_record/migration.rb', line 27

def self.down
  drop_table :taggings
  drop_table :tags
end

.up ⇒ Object 



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# File 'lib/generators/acts_as_taggable_on/migration/templates/active_record/migration.rb', line 2

def self.up
  create_table :tags do |t|
    t.string :name
    t.integer :taggings_count, :default => 0
  end

  create_table :taggings do |t|
    t.references :tag

    # You should make sure that the column created is
    # long enough to store the required class names.
    t.references :taggable, :polymorphic => true
    t.references :tagger, :polymorphic => true

    # Limit is created to prevent MySQL error on index
    # length for MyISAM table type: http://bit.ly/vgW2Ql
    t.string :context, :limit => 128

    t.datetime :created_at
  end

  add_index :taggings, :tag_id
  add_index :taggings, [:taggable_id, :taggable_type, :context]
end