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Awesome simple solution for Rails ActiveRecord dirty tracking associations
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| # Credit Brandon Weiss of http://anti-pattern.com/dirty-associations-with-activerecord | |
| # app/models/dirty_associations.rb | |
| module DirtyAssociations | |
| attr_accessor :dirty | |
| attr_accessor :_record_changes | |
| def make_dirty(record) | |
| self.dirty = true | |
| self._record_changes = record | |
| end | |
| def changed? | |
| dirty || super | |
| end | |
| end | |
| # app/models/lolrus.rb | |
| class Lolrus | |
| include DirtyAssociations | |
| has_many :buckets, | |
| :after_add => :make_dirty, | |
| :after_remove => :make_dirty | |
| end | |
| # Usage | |
| lol = Lolrus.create! | |
| lol.buckets << Bucket.new | |
| lol.changed? | |
| # => true | |
| lol._record_changes | |
| # => #<Bucket# ... > | |
| lol._record_changes.changed? | |
| # => true | |
| lol._record_changes.changes? | |
| # for example ... | |
| # => {[attr] => [old_value, new_value]} |
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