Module: ActiveRecord::Extensions::ForeignKeys

Included in:
Base
Defined in:
lib/ar-extensions/foreign_keys.rb

Overview

Enables support for enabling and disabling foreign keys for the underlyig database connection for ActiveRecord.

This can be used with or without block form. This also uses the connection attached to the model.

Example 1, without block form

Project.foreign_keys.disable
Project.foreign_keys.enable

If you use this form you have to manually re-enable the foreign keys.

Example 2, with block form

 Project.foreign_keys.disable do 
   # ...
 end

Project.foreign_keys.enable do
  # ...
end

If you use the block form the foreign keys are automatically enabled or disabled when the block exits. This currently does not restore the state of foreign keys to the state before the block was entered.

Note: If you use the disable block foreign keys will be enabled after the block exits. If you use the enable block foreign keys will be disabled after the block exits.

TODO: check the external state and restore that state when using block form.

Defined Under Namespace

Classes: ForeignKeyController

Instance Method Summary collapse

Instance Method Details

#foreign_keys ⇒ Object

end ForeignKeyController



64
65
66
 
# File 'lib/ar-extensions/foreign_keys.rb', line 64

def foreign_keys # :nodoc:
  ForeignKeyController.new( self )
end