Lets say, you have this simple form:
class EditForm(ListForm):
validator = Schema(
chained_validators = [FieldsMatch('edit.password',
'edit.password_confirm')]
)
def __init__(self, id=None, parent=None, children=[], user=None,
**kw):
super(EditForm, self).__init__(id, parent, children, **kw)
fieldset = ListFieldSet("edit", self, legend=_("User data"),
label_text = "",
children = [
Child(PasswordField, "password",
label_text=_("Password"), default=getattr(user, "password", None),
validator=UnicodeString(min=1, max=255)),
Child(PasswordField, "password_confirm",
label_text=_("Password (confirm)"), default=getattr(user, "password",
None), validator=UnicodeString(min=1, max=255)),
]
)
The FildsMatch validator will fail, because there is no key
"edit.password".
A KeyError will be raised in
formencode.validators.FieldsMatch.validate_python as the correct value
is in field_dict["edit"]["password"] and not in
field_dict["edit.password"].
You could circumvent this by adding this line at the beginning of
validate_python:
field_dict =
formencode.variabledecode.variable_encode(field_dict)
For a similar problem (with no answers yet) and a similar solution
see:
http://groups.google.com/group/turbogears/browse_thread/thread/76b93b0641989e7
Probably there are even more spots in TG/TW that cause troubles with
nested field values tranlated to nested dicts.
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