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Viewing changes to django/core/exceptions.py

  • Committer: Bazaar Package Importer
  • Author(s): Chris Lamb
  • Date: 2010-05-21 07:52:55 UTC
  • mfrom: (1.3.6 upstream)
  • mto: This revision was merged to the branch mainline in revision 28.
  • Revision ID: james.westby@ubuntu.com-20100521075255-ii78v1dyfmyu3uzx
Tags: upstream-1.2
Import upstream version 1.2

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django/core/exceptions.py
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    """Some kind of problem with a model field."""
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    pass
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NON_FIELD_ERRORS = '__all__'
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class ValidationError(Exception):
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    """An error while validating data."""
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    pass
 
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    def __init__(self, message, code=None, params=None):
 
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        import operator
 
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        from django.utils.encoding import force_unicode
 
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        """
 
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        ValidationError can be passed any object that can be printed (usually
 
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        a string), a list of objects or a dictionary.
 
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        """
 
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        if isinstance(message, dict):
 
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            self.message_dict = message
 
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            # Reduce each list of messages into a single list.
 
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            message = reduce(operator.add, message.values())
 
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        if isinstance(message, list):
 
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            self.messages = [force_unicode(msg) for msg in message]
 
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        else:
 
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            self.code = code
 
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            self.params = params
 
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            message = force_unicode(message)
 
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            self.messages = [message]
 
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    def __str__(self):
 
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        # This is needed because, without a __str__(), printing an exception
 
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        # instance would result in this:
 
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        # AttributeError: ValidationError instance has no attribute 'args'
 
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        # See http://www.python.org/doc/current/tut/node10.html#handling
 
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        if hasattr(self, 'message_dict'):
 
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            return repr(self.message_dict)
 
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        return repr(self.messages)
 
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    def __repr__(self):
 
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        if hasattr(self, 'message_dict'):
 
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            return 'ValidationError(%s)' % repr(self.message_dict)
 
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        return 'ValidationError(%s)' % repr(self.messages)
 
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    def update_error_dict(self, error_dict):
 
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        if hasattr(self, 'message_dict'):
 
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            if error_dict:
 
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                for k, v in self.message_dict.items():
 
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                    error_dict.setdefault(k, []).extend(v)
 
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            else:
 
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                error_dict = self.message_dict
 
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        else:
 
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            error_dict[NON_FIELD_ERRORS] = self.messages
 
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        return error_dict
 
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