| Module | Sequel::Plugins::Touch::ClassMethods | 
| In: | lib/sequel/plugins/touch.rb | 
| touch_column | [RW] | The column to modify when touching a model instance, as a symbol. Also used as the default column when touching associations, if the associations don‘t specify a column. | 
| touched_associations | [R] | A hash specifying the associations to touch when instances are updated or destroyed. Keys are association dataset method name symbols and values are column name symbols. | 
Set the touch_column for the subclass to be the same as the current class. Also, create a copy of the touched_associations in the subclass.
    # File lib/sequel/plugins/touch.rb, line 48
48:         def inherited(subclass)
49:           super
50:           subclass.touch_column = touch_column
51:           subclass.instance_variable_set(:@touched_associations, touched_associations.dup)
52:         end
          Add additional associations to be touched. See the :association option of the Sequel::Plugin::Touch.configure method for the format of the associations arguments.
    # File lib/sequel/plugins/touch.rb, line 57
57:         def touch_associations(*associations)
58:           associations.flatten.each do |a|
59:             a = {a=>touch_column} if a.is_a?(Symbol)
60:             a.each do |k,v|
61:               raise(Error, "invalid association: #{k}") unless r = association_reflection(k)
62:               touched_associations[r.dataset_method] = v
63:             end
64:           end
65:         end