Module: DataMapper::Constraints::Relationship::OneToMany

Defined in:
lib/data_mapper/constraints/relationship/one_to_many.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#constraint ⇒ Object (readonly)

Returns the value of attribute constraint.



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# File 'lib/data_mapper/constraints/relationship/one_to_many.rb', line 6

def constraint
  @constraint
end

Instance Method Details

#enforce_destroy_constraint(resource) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/data_mapper/constraints/relationship/one_to_many.rb', line 9

def enforce_destroy_constraint(resource)
  return true unless association = get(resource)

  constraint = self.constraint

  case constraint
  when :protect
    Array(association).empty?
  when :destroy, :destroy!
    association.__send__(constraint)
  when :set_nil
    Array(association).all? do |resource|
      resource.update(inverse => nil)
    end
  when :skip
    true  # do nothing
  end
end