On 1 juin, 06:27, aspineux <[EMAIL PROTECTED]> wrote:
> Hello
>
> I looked the source and saw I can specify a form and a validators
> in a @validate() like that
>
> @validate(form=my_form, validators=Wrapper(my_controller_method))
>
> I use the validator to make extended validation on the form fields,
> and take advantage of the form redisplay provided by @error_handling
>
> My Wrapper use same trick as controller method use to pass the fields
> as arguments, for example my_controller_method looks like
>
> def validate_password(user_name, password, password2):
> user=model.User.get_by(user_name=user_name)
> if password==user.password:
> raise InvalidField('Password must be different of previous
> one', 'password')
> return dict(user=user)
>
> Here InvalidField is raised and converted into validator.Invalid by
> the wrapper to let @error_handler do its job and redisplay the form.
>
> To not loose my freshly retrieved "user" object, I return
> it to my wrapper that will update the field_dict.
> The "normal" controller method will use this user object to finish the
> job.
>
> @turbogears.expose(template=".templates.save_password")
> @validate(form=password_form,
> validators=Wrapper(validate_password))
> @error_handler(reset_password)
Ops
This style of writting doesn't work.
> def save_password(self, user_name, password, user, **kwargs):
> user.password=password
here is a working one.
def save_password(self, user_name, password, **kwargs):
user=kwargs['user']
user.password=password
This is because Cherrypy refuse to call the function if its signature
doesn't match
the form fields list. Then extent this list in the decorator doesn't
change anything, this to late.
But then kwargs will collect these new items.
> session.flush()
> return dict(user_name=user_name, msg='Password succesfully
> reset')
>
> Here is my wrapper code and InvaliedField class:
>
> class InvalidField:
> def __init__(self, msg, field_name):
> self.msg=msg
> self.field_name=field_name
>
> class ValidatorFunctionConverter(validators.FormValidator):
>
> validate_partial_form = False
> __unpackargs__ = ('validator_func',)
>
> def validate_python(self, field_dict, state):
> # filter parameters to match the function's arguments
> to_args, to_kw=tg_util.to_kw(self.validator_func, [],
> dict(field_dict), start=0)
> args, kw=tg_util.adapt_call(self.validator_func, [],
> dict(to_kw), start=0)
>
> try:
> result=self.validator_func(**kw)
> except InvalidField, e:
> # convert the InvalidField exception into Invalid one
> raise validators.Invalid(e.msg, field_dict, state,
> error_dict={e.field_name: e.msg})
>
> if result is None:
> pass
> elif isinstance(result, types.DictType):
> field_dict.update(result)
> else:
> # FiXME: generate a better exception
> raise 'validator_func "%s" return a %s should return None
> or dictionary' % (self.validator_func.__name__, type(result).__name__)
>
> To make this work I had to change how @validate work in
> controller.py :-)
> I just changed one line :
>
> < if validators:
> ---
>
> > if not errors and validators:
>
> Here is more context for a better understanding
>
> if form:
> value = kw.copy()
> try:
> kw.update(form.validate(value, state))
> except Invalid, e:
> errors = e.unpack_errors()
> cherrypy.request.validation_exception = e
> cherrypy.request.validated_form = form
>
> ! if not errors and validators:
> if isinstance(validators, dict):
> .....
> else:
> try:
> value = kw.copy()
> kw.update(validators.to_python(value, state))
> except Invalid, e:
> errors = e.unpack_errors()
> cherrypy.request.validation_exception = e
>
> The trick is that "form" will initialize
> cherrypy.request.validated_form = form
> That way, when my "extended" validator raise and InvalidField
> the @error_handler will redisplay the form too :-)
>
> I changed
> if not errors and validators:
> because I dont want my validator to be called if the form is not
> valid,
> because some field could be missing or simply invalid to call
> validate_password(user_name, password, password2)
>
> Any comments are welcome
>
> I did it :-)
>
> --
> Alain Spineux
> aspineux gmail com
> May the sources be with you
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