Class: DataMapper::Types::Discriminator

Inherits:
DataMapper::Type show all
Defined in:
lib/dm-core/types/discriminator.rb

Constant Summary

Constants inherited from DataMapper::Type

DataMapper::Type::PROPERTY_OPTIONS

Class Method Summary collapse

Methods inherited from DataMapper::Type

configure, dump, inherited, load, nullable, options, primitive

Class Method Details

.bind(property) ⇒ 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/dm-core/types/discriminator.rb', line 11

def self.bind(property)
  repository_name = property.repository_name
  model           = property.model
  property_name   = property.name

  model.default_scope(repository_name).update(property_name => model.descendants.dup << model)

  model.class_eval "extend Chainable\n\nextendable do\ndef inherited(model)\nsuper  # setup self.descendants\nset_discriminator_scope_for(model)\nend\n\ndef new(*args, &block)\nif args.size == 1 && args.first.kind_of?(Hash)\ndiscriminator = properties(repository_name).discriminator\nmodel         = discriminator.typecast(args.first[discriminator.name])\n\nif model.kind_of?(Model) && !model.equal?(self)\nreturn model.new(*args, &block)\nend\nend\n\nsuper\nend\n\nprivate\n\ndef set_discriminator_scope_for(model)\nmodel.default_scope(\#{repository_name.inspect}).update(\#{property_name.inspect} => model.descendants.dup << model)\nend\nend\n", __FILE__, __LINE__ + 1
end