overriding validate_unique not raising a ValidationError

Question

I am trying to override the validate_unique for on of my models to validate that a record doesn't exist with duplicate fields (labeler, date), but It's not raising any validation error when i enter duplicate (labeler, date).

I've already looked through the issues here and here and constructed my view and model as follows:

my view:

class AttendanceCreateView(CreateView):
    model = Attendance
    template_name = "attendance/attendance_form.html"
    fields = [
        "team_lead",
        "labeler",
        "attendance",
    ]

    def get_success_url(self):
        return reverse("attendance-home")

my model:

class Attendance(models.Model):
    id= models.AutoField(primary_key=True)
    attendance = models.IntegerField(blank=True, choices= CHOICES_ATTENDANCE, null=True)
    labeler = models.ForeignKey('Labelers', models.CASCADE, blank=True, null=True)
    team_lead = models.ForeignKey('TeamLeads', models.CASCADE, blank=True, null=True)
    date = models.DateField(auto_now_add=True, null=True) 

    class Meta:
        managed = False
        db_table = "attendance"
    
    def validate_unique(self, *args, **kwargs):
        super().validate_unique(*args, **kwargs)
        if self.__class__.objects.filter(labeler= self.labeler, date= self.date).exists():
            raise ValidationError(message='a already record exists for date and labeler',)

any idea why my code is not behaving as expected ? thanks is advance.

overriding validate_unique not raising a ValidationError

0 Answers0