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1 "Global Django exceptions" |
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2 |
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3 class ObjectDoesNotExist(Exception): |
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4 "The requested object does not exist" |
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5 silent_variable_failure = True |
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6 |
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7 class MultipleObjectsReturned(Exception): |
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8 "The query returned multiple objects when only one was expected." |
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9 pass |
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10 |
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11 class SuspiciousOperation(Exception): |
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12 "The user did something suspicious" |
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13 pass |
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14 |
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15 class PermissionDenied(Exception): |
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16 "The user did not have permission to do that" |
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17 pass |
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18 |
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19 class ViewDoesNotExist(Exception): |
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20 "The requested view does not exist" |
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21 pass |
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22 |
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23 class MiddlewareNotUsed(Exception): |
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24 "This middleware is not used in this server configuration" |
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25 pass |
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26 |
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27 class ImproperlyConfigured(Exception): |
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28 "Django is somehow improperly configured" |
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29 pass |
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30 |
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31 class FieldError(Exception): |
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32 """Some kind of problem with a model field.""" |
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33 pass |
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34 |
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35 NON_FIELD_ERRORS = '__all__' |
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36 class ValidationError(Exception): |
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37 """An error while validating data.""" |
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38 def __init__(self, message, code=None, params=None): |
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39 import operator |
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40 from django.utils.encoding import force_unicode |
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41 """ |
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42 ValidationError can be passed any object that can be printed (usually |
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43 a string), a list of objects or a dictionary. |
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44 """ |
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45 if isinstance(message, dict): |
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46 self.message_dict = message |
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47 # Reduce each list of messages into a single list. |
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48 message = reduce(operator.add, message.values()) |
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49 |
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50 if isinstance(message, list): |
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51 self.messages = [force_unicode(msg) for msg in message] |
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52 else: |
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53 self.code = code |
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54 self.params = params |
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55 message = force_unicode(message) |
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56 self.messages = [message] |
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57 |
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58 def __str__(self): |
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59 # This is needed because, without a __str__(), printing an exception |
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60 # instance would result in this: |
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61 # AttributeError: ValidationError instance has no attribute 'args' |
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62 # See http://www.python.org/doc/current/tut/node10.html#handling |
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63 if hasattr(self, 'message_dict'): |
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64 return repr(self.message_dict) |
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65 return repr(self.messages) |
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66 |
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67 def __repr__(self): |
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68 if hasattr(self, 'message_dict'): |
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69 return 'ValidationError(%s)' % repr(self.message_dict) |
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70 return 'ValidationError(%s)' % repr(self.messages) |
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71 |
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72 def update_error_dict(self, error_dict): |
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73 if hasattr(self, 'message_dict'): |
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74 if error_dict: |
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75 for k, v in self.message_dict.items(): |
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76 error_dict.setdefault(k, []).extend(v) |
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77 else: |
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78 error_dict = self.message_dict |
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79 else: |
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80 error_dict[NON_FIELD_ERRORS] = self.messages |
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81 return error_dict |
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82 |