def __init__(self, *args, **fields):
Field.__init__(self)
if len(args) == 1:
if fields:
raise TypeError('keyword arguments and dict given')
self.fields = OrderedDict(args[0])
else:
if args:
raise TypeError('no positional arguments allowed if keyword '
'arguments provided.')
self.fields = OrderedDict(fields)
self.fields.sort(key=lambda i: i[1]._position_hint)
class Mapping(Field):
"""Apply a set of fields to a dictionary of values.
>>> field = Mapping(name=TextField(), age=IntegerField())
>>> field({'name': u'John Doe', 'age': u'42'})
{'age': 42, 'name': u'John Doe'}
Although it's possible to reassign the widget after field construction
it's not recommended because the `MappingWidget` is the only builtin
widget that is able to handle mapping structures.
"""
widget = widgets.MappingWidget
def __init__(self, *args, **fields):
Field.__init__(self)
if len(args) == 1:
if fields:
raise TypeError('keyword arguments and dict given')
self.fields = OrderedDict(args[0])
else:
if args:
raise TypeError('no positional arguments allowed if keyword '
'arguments provided.')
self.fields = OrderedDict(fields)
self.fields.sort(key=lambda i: i[1]._position_hint)
def empty_as_item(self, values):
for name, field in self.fields.iteritems():
if field.empty_as_item(values.get(name)):
return True
return False
def convert(self, value):
value = _force_dict(value)
errors = {}
result = {}
for name, field in self.fields.iteritems():
try:
result[name] = field(value.get(name))
except ValidationError, e:
errors[name] = e
if errors:
raise MultipleValidationErrors(errors)
return result
