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Add instance and validator_value attributes to ValidationError #80

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Add instance and validator_value attributes to ValidationError #80

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14 changes: 12 additions & 2 deletions jsonschema.py
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Original file line number Diff line number Diff line change
Expand Up @@ -56,11 +56,16 @@


class _Error(Exception):
def __init__(self, message, validator=None, path=(), cause=None):
def __init__(
self, message, validator=None, path=(), cause=None, instance=None,
validator_value=None
):
super(_Error, self).__init__(message, validator, path)
self.message = message
self.path = collections.deque(path)
self.instance = instance
self.validator = validator
self.validator_value = validator_value
self.cause = cause

def __str__(self):
Expand Down Expand Up @@ -217,9 +222,14 @@ def iter_errors(self, instance, _schema=None):

errors = validator(v, instance, _schema) or ()
for error in errors:
# set validator if it wasn't already set by the called fn
# set validator attributes if they weren't already set by
# the called function
if error.validator is None:
error.validator = k
if error.validator_value is None:
error.validator_value = v
if error.instance is None:
error.instance = instance
yield error

def validate(self, *args, **kwargs):
Expand Down
10 changes: 10 additions & 0 deletions tests.py
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Original file line number Diff line number Diff line change
Expand Up @@ -382,6 +382,16 @@ def test_single_nesting(self):
self.assertEqual(e3.validator, "maximum")
self.assertEqual(e4.validator, "type")

self.assertEqual(e1.validator_value, 2)
self.assertEqual(e2.validator_value, [2, 4, 6, 8])
self.assertEqual(e3.validator_value, 10)
self.assertEqual(e4.validator_value, "string")

self.assertEqual(e1.instance, [1])
self.assertEqual(e2.instance, 15)
self.assertEqual(e3.instance, 15)
self.assertEqual(e4.instance, 2)

def test_multiple_nesting(self):
instance = [1, {"foo" : 2, "bar" : {"baz" : [1]}}, "quux"]
schema = {
Expand Down