def _convert_to_write(self, values):
""" Convert the `values` dictionary into the format of :meth:`write`. """
fields = self._fields
- return dict(
- (name, write_value)
- for name, value in values.iteritems()
- if name in self._fields
- for write_value in [fields[name].convert_to_write(value)]
- if not isinstance(write_value, NewId)
- )
+ result = {}
+ for name, value in values.iteritems():
+ if name in fields:
+ value = fields[name].convert_to_write(value)
+ if not isinstance(value, NewId):
+ result[name] = value
+ return result
#
# Record traversal and update