I'm working on validating my webapp, which is using Turbogears 2.3.3 and formencode 1.3
I want to validate a dynamic form that the user has created through a form creation process.
I'm sending the form fields from the client to the server using json to help organize things.
Here is how I'm sending the data:
var dataToSend = JSON.stringify({
'num_of_copies': num_of_copies.val(),
'amountAnswers' : amountAnswers,
'yesNoAnswers' : yesNoAnswers,
'selectAnswers' : selectAnswers,
'comments':comments.val()
})
$.ajax({
type: 'POST',
url: siteProxy+'orders/saveOrderItem',
data: {'data':dataToSend},
dataType: "json",
success: function (data, textStatus) {
if (textStatus == "success") {
if (data.errors){
console.log(data.errors)
}
}
},
error: function (data, textStatus) {
alert('error');
}
})
On The server I want to validate the data and then do some stuff
@expose('json')
@validate(validators=orderItemSchema(),error_handler=simpleErrorHandler)
def saveOrderItem(self,**kw):
answers = json.loads(kw['data'])
...... do stuff ...
Without the validations, my code works.
Here is my validation Schema:
class orderItemSchema(Schema):
def _convert_to_python(self, value_dict, state):
value_dict = json.loads(value_dict['data'])
super(orderItemSchema,self)._convert_to_python(value_dict, state)
num_of_copies = validators.Number(min=1)
comments = validators.UnicodeString()
amountAnswers = ForEach(AmountAnswerValidator())
yesNoAnswers = ForEach(YesNoAnswerValidator())
selectAnswers = ForEach(SelectAnswerValidator())
The validation works well.
My problem is this: after the validation, kw turns to none, and I can't do stuff in
def saveOrderItem(self,**kw):
I think the problem lies somewhere in this part of the code:
class orderItemSchema(Schema):
def _convert_to_python(self, value_dict, state):
value_dict = json.loads(value_dict['data'])
super(orderItemSchema,self)._convert_to_python(value_dict, state)
Thanks for the help
Probably
orderItemSchema._convert_to_python
is missing return value. Should bereturn super(orderItemSchema,self)._convert_to_python(value_dict, state)
or you will be returningNone
as the converted value.If you are using a recent tg version I suggest you also have a look at
@decode_params
decorator ( http://turbogears.readthedocs.org/en/latest/reference/classes.html#tg.decorators.decode_params ), it will extract the controller parameters from the json body and let validation flow as usual. It will avoid the twojson.load
in your code.