Re: Validators and django.contrib.postgres.fields JSONField

So I've dug into this a little more, and I've come up with the debugger trace below.

-> dummyModelInstance.full_clean()
  c:\program files\python35\lib\site-packages\django\db\models\base.py(1210)full_clean()
-> self.clean_fields(exclude=exclude)
  c:\program files\python35\lib\site-packages\django\db\models\base.py(1252)clean_fields()
-> setattr(self, f.attname, f.clean(raw_value, self))
  c:\program files\python35\lib\site-packages\django\db\models\fields\__init__.py(592)clean()
-> self.run_validators(value)
  c:\program files\python35\lib\site-packages\django\db\models\fields\__init__.py(544)run_validators()
-> v(value)
> c:\program files\python35\lib\site-packages\django\utils\deconstruct.py(16)__new__()
-> def __new__(cls, *args, **kwargs):
(Pdb) ll
 16  ->         def __new__(cls, *args, **kwargs):
 17                 # We capture the arguments to make returning them trivial
 18                 obj = super(klass, cls).__new__(cls)
 19                 obj._constructor_args = (args, kwargs)
 20                 return obj

For some reason, when run_validators() calls the custom TestValidator, it seems that a TestValidator object is constructed rather than entering the __call__() method of the class. I can't see a reason for this to happen, so what am I doing wrong here?

Thanks,
-Ryan Causey

On Sunday, August 21, 2016 at 9:32:50 PM UTC-7, Ryan Causey wrote:

Hello,

I've stumbled upon an issue when using JSONField from django.contrib.postgres.fields where I can't get it to run my additional validators when calling full_clean(). To show a simplified example:

validators.py:

@deconstructible
class TestValidator(object):
    def __call__(self, foo):
        raise ValidationError(message = _("Expected Error"))

models.py:

class DummyModel(models.Model):
    dummyJson = JSONField(validators = [TestValidator])

shell output:

>>> from Dummy.models import DummyModel
>>> import json
>>> dummyJsonInput = json.loads("""{"foo" : "bar"}""")
>>> dummyModelInstance = DummyModel(dummyJson = dummyJsonInput)
>>> dummyModelInstance.full_clean()
>>>

Am I doing something wrong? I've read some documentation about needing to define __eq__ for migration purposes, but I tried defining it and it didn't seem to make a difference.

Any help is appreciated.

Thanks,
-Ryan Causey

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