Module: DataMapper::NestedAttributes::OneToMany

Defined in:
lib/dm-accepts_nested_attributes/relationship.rb

Overview

Extensions for Associations::OneToMany::Relationship.

Instance Method Summary collapse

Instance Method Details

#extract_keys_for_nested_attributes(model, attributes) ⇒ Object 



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# File 'lib/dm-accepts_nested_attributes/relationship.rb', line 38

def extract_keys_for_nested_attributes(model, attributes)
  keys = self.child_model.key.to_enum(:each_with_index).map do |key, idx|
    if parent_idx = self.child_key.to_a.index(key)
      model[self.parent_key.to_a.at(parent_idx).name]
    else
      attributes[key.name]
    end
  end

  keys.any? { |key| DataMapper::Ext.blank?(key) } ? nil : keys
end