Class: ActsAsTaggableOnMigration

Inherits:
ActiveRecord::Migration
  • Object
show all
Defined in:
lib/generators/cargo_wiki/templates/acts_as_taggable_on_migration.rb

Class Method Summary collapse

Class Method Details

.down ⇒ Object 



26
27
28
29
 
# File 'lib/generators/cargo_wiki/templates/acts_as_taggable_on_migration.rb', line 26

def self.down
  drop_table :taggings
  drop_table :tags
end

.up ⇒ Object 



2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
# File 'lib/generators/cargo_wiki/templates/acts_as_taggable_on_migration.rb', line 2

def self.up
  create_table :tags do |t|
    t.string :name
  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 o index lenght 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