Class: Redundancy::UpdateColumnWithPrev

Inherits:
UpdateBase
  • Object
show all
Defined in:
lib/redundancy/update_column_with_prev.rb

Instance Attribute Summary

Attributes inherited from UpdateBase

#change_if, #dest, #klass, #options, #source

Instance Method Summary collapse

Methods inherited from UpdateBase

#after_save, #force_update!, #initialize

Constructor Details

This class inherits a constructor from Redundancy::UpdateBase

Instance Method Details

#before_save(record) ⇒ Object 



7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
# File 'lib/redundancy/update_column_with_prev.rb', line 7

def before_save record
  raise_if_class_mismatch record
  return unless need_update? record

  get_target_from_association record
  get_value_from_association record

  update_target record

  return unless foreign_key_changed? record
  get_target_from_foreign_key record, :prev
  get_value_from_default record, :prev

  update_target record, :prev
ensure
  cleanup_context
end