Handling unallowed unicode value #280
Description
Used Cerberus version: 1.0.1
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I consulted these documentations:
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I found nothing relevant to my problem in the docs.
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I found the documentation not helpful to my problem.
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I have the capacity to improve the docs when my problem is solved.
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I have the capacity to submit a patch when a bug is identified.
I'm using Cerberus to validate data send by users, data can be unicode. One of the validated fields needs to be a certain allowed value. Value itself can be a unicode string but allowed list does not have any unicode elements.
This is a simple illustration of the problem.
from cerberus import Validator
schema = {'name': {'type': 'string', 'allowed': ['Joe']}
v = Validator(schema)
In [1]: v.validate({'name': 'Jo'})
Out[1]: False
In [2]: v.errors
Out[2]: {'name': ['unallowed value Jo']}
In [3]: v.validate({'name': u'Michał'})
Out[3]: False
In [4]: v.errors
---------------------------------------------------------------------------
/home/majki/.virtualenvs/cerberus-playground/lib/python2.7/site-packages/cerberus/errors.pyc in format_message(self, field, error)
462 return self.messages[error.code]\
463 .format(*error.info, constraint=error.constraint,
--> 464 field=field, value=error.value)
465
466 def insert_error(self, path, node):
UnicodeEncodeError: 'ascii' codec can't encode character u'\u0142' in position 5: ordinal not in range(128)As you can see an exception occurs when I try to display the error message.
At first I was encoding the data before validation, what worked, but than it would require to decode it back before rendering a response. So it seemed a bit off to do.
Since my allowed list does not contain any unicode strings as a workaround I have created a validator that rejects non ASCII string with a proper message and does manual check for allowed values.
Is this a bug? Or am I doing something horribly wrong with unicode?