Getting validation error field can not be null, even if null=True in model

Asked Nov 18 '19 at 06:49

Active Nov 18 '19 at 07:19

Viewed 3,069 times

I've a foreign key in my model and this field can be null.

status = models.ForeignKey(Status, on_delete=models.SET_NULL, null=True, blank=True, related_name="status")

When i send a request with this field as null i get validation error saying

[
    {
        "status": [
            "This field may not be null."
        ]
    }
]

Even though I have set null=True I'm not sure why it's throwing me that validation error? Can anyone please help me with this.

Update 1:

This is the below sample serializers I'm using

class SampleSerializer(serializers.ModelSerializer):
    id = serializers.IntegerField(read_only=False)
    status = serializers.CharField()

    class Meta:
        model = model_name
        list_serializer_class = SampleListSerializerClass
        fields = ("status", ...few other model fields)

edited Nov 18 '19 at 07:19

asked Nov 18 '19 at 06:49

Aashay Amballi

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`null=True` just says the database column can have a value of `NULL`. `blank=True` is what allows the field to be blank. Can you show us your form please? – Kent Shikama Nov 18 '19 at 06:53
And just to double check, you have run `migrate`? – Kent Shikama Nov 18 '19 at 06:54
I'm using Django rest framework. This is throwing me when my body of the request is not valid. so in the request, if I send status: null it throws me a validation error. – Aashay Amballi Nov 18 '19 at 06:55
Yes, I've migrated it. But still getting the error. – Aashay Amballi Nov 18 '19 at 06:56
@AashayAmballi where is your form ? – Nishant Nawarkhede Nov 18 '19 at 06:58
@NishantNawarkhede I'm using Django Rest Framework. It's throwing me when serializer is not valid. So basically when I send request from postman with the status values as null. It throws me the validation error. Even though I've set null=True in my models.py status field. :( – Aashay Amballi Nov 18 '19 at 07:00
Ah yes, what about your serializer then? – Kent Shikama Nov 18 '19 at 07:00
@KentShikama What do you need to see in the serializers? – Aashay Amballi Nov 18 '19 at 07:01
2

Your fields. For example, `required`, `allow_null`, or `allow_blank`. – Kent Shikama Nov 18 '19 at 07:02
See https://stackoverflow.com/a/41172099/2750819 – Kent Shikama Nov 18 '19 at 07:05
2

I figured it out, I forgot to add allow_null=True in the serializer field. – Aashay Amballi Nov 18 '19 at 07:11
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/202543/discussion-between-aashay-amballi-and-kent-shikama). – Aashay Amballi Nov 18 '19 at 07:12

Getting validation error field can not be null, even if null=True in model

0 Answers0