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Fixed #28507 -- Made ValidationError.__eq__() ignore messages and params ordering. 

Co-authored-by: caleb logan <clogan202@gmail.com>
This commit is contained in:
David Smith 2020-07-21 20:05:33 +01:00 committed by Mariusz Felisiak
parent 16218c2060
commit 95da207bdb
3 changed files with 292 additions and 0 deletions
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20
django/core/exceptions.py
View File

@ -1,6 +1,9 @@
"""
Global Django exception and warning classes.
"""
import operator
from django.utils.hashable import make_hashable
class FieldDoesNotExist(Exception):
@ -182,6 +185,23 @@ class ValidationError(Exception):
def __repr__(self):
return 'ValidationError(%s)' % self
def __eq__(self, other):
if not isinstance(other, ValidationError):
return NotImplemented
return hash(self) == hash(other)
def __hash__(self):
# Ignore params and messages ordering.
if hasattr(self, 'message'):
return hash((
self.message,
self.code,
tuple(sorted(make_hashable(self.params))) if self.params else None,
))
if hasattr(self, 'error_dict'):
return hash(tuple(sorted(make_hashable(self.error_dict))))
return hash(tuple(sorted(self.error_list, key=operator.attrgetter('message'))))
class EmptyResultSet(Exception):
"""A database query predicate is impossible."""

3
docs/releases/3.2.txt
View File

@ -341,6 +341,9 @@ Validators
of a raised :exc:`~django.core.exceptions.ValidationError`. This allows
custom error messages to use the ``%(value)s`` placeholder.
* The :class:`.ValidationError` equality operator now ignores ``messages`` and
``params`` ordering.
.. _backwards-incompatible-3.2:
Backwards incompatible changes in 3.2

269
tests/test_exceptions/test_validation_error.py
View File

@ -1,4 +1,5 @@
import unittest
from unittest import mock
from django.core.exceptions import ValidationError
@ -14,3 +15,271 @@ class TestValidationError(unittest.TestCase):
message_dict['field2'] = ['E3', 'E4']
exception = ValidationError(message_dict)
self.assertEqual(sorted(exception.messages), ['E1', 'E2', 'E3', 'E4'])
def test_eq(self):
error1 = ValidationError('message')
error2 = ValidationError('message', code='my_code1')
error3 = ValidationError('message', code='my_code2')
error4 = ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code1',
params={'parm1': 'val1', 'parm2': 'val2'},
)
error5 = ValidationError({'field1': 'message', 'field2': 'other'})
error6 = ValidationError({'field1': 'message'})
error7 = ValidationError([
ValidationError({'field1': 'field error', 'field2': 'other'}),
'message',
])
self.assertEqual(error1, ValidationError('message'))
self.assertNotEqual(error1, ValidationError('message2'))
self.assertNotEqual(error1, error2)
self.assertNotEqual(error1, error4)
self.assertNotEqual(error1, error5)
self.assertNotEqual(error1, error6)
self.assertNotEqual(error1, error7)
self.assertEqual(error1, mock.ANY)
self.assertEqual(error2, ValidationError('message', code='my_code1'))
self.assertNotEqual(error2, ValidationError('other', code='my_code1'))
self.assertNotEqual(error2, error3)
self.assertNotEqual(error2, error4)
self.assertNotEqual(error2, error5)
self.assertNotEqual(error2, error6)
self.assertNotEqual(error2, error7)
self.assertEqual(error4, ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code1',
params={'parm1': 'val1', 'parm2': 'val2'},
))
self.assertNotEqual(error4, ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code2',
params={'parm1': 'val1', 'parm2': 'val2'},
))
self.assertNotEqual(error4, ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code1',
params={'parm2': 'val2'},
))
self.assertNotEqual(error4, ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code1',
params={'parm2': 'val1', 'parm1': 'val2'},
))
self.assertNotEqual(error4, ValidationError(
'error val1 val2',
code='my_code1',
))
# params ordering is ignored.
self.assertEqual(error4, ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code1',
params={'parm2': 'val2', 'parm1': 'val1'},
))
self.assertEqual(
error5,
ValidationError({'field1': 'message', 'field2': 'other'}),
)
self.assertNotEqual(
error5,
ValidationError({'field1': 'message', 'field2': 'other2'}),
)
self.assertNotEqual(
error5,
ValidationError({'field1': 'message', 'field3': 'other'}),
)
self.assertNotEqual(error5, error6)
# fields ordering is ignored.
self.assertEqual(
error5,
ValidationError({'field2': 'other', 'field1': 'message'}),
)
self.assertNotEqual(error7, ValidationError(error7.error_list[1:]))
self.assertNotEqual(
ValidationError(['message']),
ValidationError([ValidationError('message', code='my_code')]),
)
# messages ordering is ignored.
self.assertEqual(
error7,
ValidationError(list(reversed(error7.error_list))),
)
self.assertNotEqual(error4, ValidationError([error4]))
self.assertNotEqual(ValidationError([error4]), error4)
self.assertNotEqual(error4, ValidationError({'field1': error4}))
self.assertNotEqual(ValidationError({'field1': error4}), error4)
def test_eq_nested(self):
error_dict = {
'field1': ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code',
params={'parm1': 'val1', 'parm2': 'val2'},
),
'field2': 'other',
}
error = ValidationError(error_dict)
self.assertEqual(error, ValidationError(dict(error_dict)))
self.assertEqual(error, ValidationError({
'field1': ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code',
params={'parm2': 'val2', 'parm1': 'val1'},
),
'field2': 'other',
}))
self.assertNotEqual(error, ValidationError(
{**error_dict, 'field2': 'message'},
))
self.assertNotEqual(error, ValidationError({
'field1': ValidationError(
'error %(parm1)s val2',
code='my_code',
params={'parm1': 'val1'},
),
'field2': 'other',
}))
def test_hash(self):
error1 = ValidationError('message')
error2 = ValidationError('message', code='my_code1')
error3 = ValidationError('message', code='my_code2')
error4 = ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code1',
params={'parm1': 'val1', 'parm2': 'val2'},
)
error5 = ValidationError({'field1': 'message', 'field2': 'other'})
error6 = ValidationError({'field1': 'message'})
error7 = ValidationError([
ValidationError({'field1': 'field error', 'field2': 'other'}),
'message',
])
self.assertEqual(hash(error1), hash(ValidationError('message')))
self.assertNotEqual(hash(error1), hash(ValidationError('message2')))
self.assertNotEqual(hash(error1), hash(error2))
self.assertNotEqual(hash(error1), hash(error4))
self.assertNotEqual(hash(error1), hash(error5))
self.assertNotEqual(hash(error1), hash(error6))
self.assertNotEqual(hash(error1), hash(error7))
self.assertEqual(
hash(error2),
hash(ValidationError('message', code='my_code1')),
)
self.assertNotEqual(
hash(error2),
hash(ValidationError('other', code='my_code1')),
)
self.assertNotEqual(hash(error2), hash(error3))
self.assertNotEqual(hash(error2), hash(error4))
self.assertNotEqual(hash(error2), hash(error5))
self.assertNotEqual(hash(error2), hash(error6))
self.assertNotEqual(hash(error2), hash(error7))
self.assertEqual(hash(error4), hash(ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code1',
params={'parm1': 'val1', 'parm2': 'val2'},
)))
self.assertNotEqual(hash(error4), hash(ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code2',
params={'parm1': 'val1', 'parm2': 'val2'},
)))
self.assertNotEqual(hash(error4), hash(ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code1',
params={'parm2': 'val2'},
)))
self.assertNotEqual(hash(error4), hash(ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code1',
params={'parm2': 'val1', 'parm1': 'val2'},
)))
self.assertNotEqual(hash(error4), hash(ValidationError(
'error val1 val2',
code='my_code1',
)))
# params ordering is ignored.
self.assertEqual(hash(error4), hash(ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code1',
params={'parm2': 'val2', 'parm1': 'val1'},
)))
self.assertEqual(
hash(error5),
hash(ValidationError({'field1': 'message', 'field2': 'other'})),
)
self.assertNotEqual(
hash(error5),
hash(ValidationError({'field1': 'message', 'field2': 'other2'})),
)
self.assertNotEqual(
hash(error5),
hash(ValidationError({'field1': 'message', 'field3': 'other'})),
)
self.assertNotEqual(error5, error6)
# fields ordering is ignored.
self.assertEqual(
hash(error5),
hash(ValidationError({'field2': 'other', 'field1': 'message'})),
)
self.assertNotEqual(
hash(error7),
hash(ValidationError(error7.error_list[1:])),
)
self.assertNotEqual(
hash(ValidationError(['message'])),
hash(ValidationError([ValidationError('message', code='my_code')])),
)
# messages ordering is ignored.
self.assertEqual(
hash(error7),
hash(ValidationError(list(reversed(error7.error_list)))),
)
self.assertNotEqual(hash(error4), hash(ValidationError([error4])))
self.assertNotEqual(hash(ValidationError([error4])), hash(error4))
self.assertNotEqual(
hash(error4),
hash(ValidationError({'field1': error4})),
)
def test_hash_nested(self):
error_dict = {
'field1': ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code',
params={'parm2': 'val2', 'parm1': 'val1'},
),
'field2': 'other',
}
error = ValidationError(error_dict)
self.assertEqual(hash(error), hash(ValidationError(dict(error_dict))))
self.assertEqual(hash(error), hash(ValidationError({
'field1': ValidationError(
'error %(parm1)s %(parm2)s',
code='my_code',
params={'parm1': 'val1', 'parm2': 'val2'},
),
'field2': 'other',
})))
self.assertNotEqual(hash(error), hash(ValidationError(
{**error_dict, 'field2': 'message'},
)))
self.assertNotEqual(hash(error), hash(ValidationError({
'field1': ValidationError(
'error %(parm1)s val2',
code='my_code',
params={'parm1': 'val1'},
),
'field2': 'other',
})))