Using F objects raise an exception when calling save

[mounirmesselmeni]

ValidationError
[u"'F(field_name) + Value(1)' value must be an integer."]

dirtyfields/dirtyfields.py ? in _as_dict

            if field.rel:
                if not check_relationship:
                    continue
            field_value = getattr(self, field.attname)
            all_field[field.name] = field.to_python(field_value) #This line

[romgar]

Hi @mounirmesselmeni , can you give some related code please ? The model you have defined, ...

[mounirmesselmeni]

@romgar Use any model this does not matter, just try to use F object and call save method

from django.db import models

from dirtyfields.dirtyfields import DirtyFieldsMixin


class TestModel(DirtyFieldsMixin, models.Model):

    counter = models.IntegerField(default=0)
    name = models.CharField(max_length=250)

Run this:

instance = TestModel.objects.all().first()
from django.db.models import F
instance.counter = F('counter') + 1
instance.save()

ValidationError: [u"'F(counter) + Value(1)' value must be an integer."]

This is a regression on the 0.6 release

[romgar]

Not a so usual case. Will deal with it.

[mounirmesselmeni]

Yeah but it's a regression related to calling to_python.
bf7a637#diff-03d4c5a503f183e4ca7f22ee6904bc06R24

[romgar]

Yep. Caught.

[romgar]

@mounirmesselmeni I have tried a naive approach to resolve it #40. If anybody has a better idea, feel free to propose :-)