Class: DataMapper::Types::SdbArray

Inherits:
DataMapper::Type
  • Object
show all
Defined in:
lib/dm-adapter-simpledb/sdb_array.rb

Class Method Summary collapse

Class Method Details

.dump(value, property) ⇒ Object 



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# File 'lib/dm-adapter-simpledb/sdb_array.rb', line 22

def self.dump(value, property)
  dumped = ::Object.new
  # This is a little screwy. DataMapper has a fixed list of values it
  # considers primitives, and it insists that the value that comes out of
  # a type's .dump() method MUST match one of these types. For SimpleDB
  # Array is effectively a primitive because of the way it stores values,
  # but DM doesn't include Array in it's list of valid primtive types. So
  # we need to return an object which IS considered a primitive - in this
  # case a plain 'ole Ruby Object. In order to convey the actual array
  # value to the backend, we tack on a #to_ary method which returns the
  # array data. Aws calls Array() on all values before writing them,
  # which in turn calls #to_ary(), and winds up with the correct data. In
  # effect we are sneaking the array data through DataMapper inside a
  # singleton method.
  singleton_class = (class << dumped; self; end)
  singleton_class.send(:define_method, :to_ary) do
    value
  end
  singleton_class.send(:define_method, :to_s) do
    value.to_s
  end
  dumped
end

.load(value, property) ⇒ Object 



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# File 'lib/dm-adapter-simpledb/sdb_array.rb', line 18

def self.load(value, property)
  value
end

.typecast(value, property) ⇒ Object 



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# File 'lib/dm-adapter-simpledb/sdb_array.rb', line 46

def self.typecast(value, property)
  value
end