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= DirtyAssociations
Monitors changes to <tt>has_many</tt> and <tt>has_and_belongs_to_many</tt> associations using ActiveModel::Dirty.
== Usage
Include <tt>DirtyAssociations</tt> concern in your model.
include DirtyAssocations
Call <tt>monitor_association_changes</tt> method after <tt>has_many</tt>.
has_many :foos
monitor_association_changes :foos
Check one of the following methods to see if the relation has changed:
- <tt>changes</tt>
- <tt>changed</tt>
- <tt>previous_changes</tt>
- <tt>[singularized_association_name]_ids_changed?</tt>
- <tt>[singularized_association_name]_ids_previously_changed?</tt>
bar.foos = [ Foo.find(42) ] # or you can use the foo_ids setter
bar.changes # { "foo_ids" => [[5], [42]] }
bar.changed # [ "foo_ids" ]
bar.foo_ids_changed? # true
bar.foo_ids_previously_changed? # false
bar.save
bar.previous_changes # { "foo_ids" => [[5], [42]] }
bar.foo_ids_changed? # false
bar.foo_ids_previously_changed? # true
Version data entries
8 entries across 8 versions & 1 rubygems