Class: DataMapper::Types::Key

Inherits:
Type
  • Object
show all
Defined in:
lib/dm-appengine/types.rb

Class Method Summary collapse

Class Method Details

.dump(value, property) ⇒ Object 



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# File 'lib/dm-appengine/types.rb', line 122

def self.dump(value, property)
  property.typecast(value)
end

.kind(property) ⇒ Object 



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# File 'lib/dm-appengine/types.rb', line 162

def self.kind(property)
  property.model.repository.adapter.kind(property.model)
end

.load(value, property) ⇒ Object 



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# File 'lib/dm-appengine/types.rb', line 126

def self.load(value, property)
  value
end

.typecast(value, property) ⇒ Object 



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# File 'lib/dm-appengine/types.rb', line 130

def self.typecast(value, property)
  case value
  when AppEngine::Datastore::Key, NilClass
    value
  when Integer, String
    AppEngine::Datastore::Key.from_path(kind(property), value)
  when Symbol
    AppEngine::Datastore::Key.from_path(kind(property), value.to_s)
  when Hash
    parent = property.typecast(value[:parent])
    id = value[:id]
    name = value[:name]
    if id
      id_or_name = id.to_i
    elsif name
      id_or_name = name.to_s
    end
    if parent
      if id_or_name || (!property.key?)
        parent.getChild(kind(property), id_or_name)
      else
        # TODO: is it sane to not typecast this?
        value
      end
    else
      property.typecast(id_or_name)
    end
  else
    raise ArgumentError, "Unsupported key value #{value.inspect} (a #{value.class})"
  end
end