using state

This is obviously a really stupid question, since I can't find the  
answer by googling, but I can't figure out how to use state with a  
Schema. I'm just trying to pass a list of objects into one of my  
custom validators, so it can check the incoming value against existing  
values, but I don't know where to insert it into the flow. No matter  
where and how I insert it (and I have spent an entire morning  
squinting at the source code and thinking of creative ways to do so),  
it raises an error at schema.py line 135, because 'list object has no  
attribute full_dict'. This is quite correct, but I don't see how it  
_would_ get the 'full_dict' attribute in the first place. Here's my  
entire form, if someone could put me out of my misery that would be  
great.

Thanks in advance,
Eric

State should be used in the validate_python method of  
KeywordValidator. This gets called in a controller method as:

formdata = IntUploadSchema().to_python(kwargs) # I assume state is  
added in here somewhere?




class UploadValidator(formencode.FancyValidator):
     def _to_python(self, value, state):
         value = value.filename if value.filename else None
         return value


class KeywordValidator(formencode.FancyValidator):
     def _to_python(self,value,state):
         return value.lower()
     def validate_python(self,value,state):
         if value in [x.keyword for x in state]:
             raise formencode.Invalid("That keyword is already  
taken.", value, state)
         if ' ' in value:
             raise formencode.Invalid("Don't put spaces in the  
keyword.", value, state)

class IntUploadSchema(formencode.Schema):
     upload = UploadValidator(strip=True, not_empty=True)
     keyword = formencode.All(validators.UnicodeString(strip=True,  
not_empty=True), KeywordValidator())


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