[Django]-Django: The value of the id field is coming None

by

2👍

✅

To get the id you need to try the answer provided by @JPG. But since the save() method is being called in initial step, the urlhash might not get updated as it is not saved in the instance. To update the urlhash, you can do something like:

def save(self):
    super(Group1, self).save()
    if not self.urlhash:
        if self.user.profile.user_type == 'Business User':
            urlhash = 'B' + str(self.User.id) + ('00') + str(self.id)
            Group1.objects.filter(pk=self.pk).update(urlhash=urlhash)
        else:
            self.urlhash = 'P' + str(self.User.id) + ('00') + str(self.id)
            Group1.objects.filter(pk=self.pk).update(urlhash=urlhash)
👤Sanip

7👍

Why self.id is None?

This is because Django assigns the id/pk values after the object creation, that is after calling the save() method of model.

So, call the save() method and then try to do your logic, as below

def save(self):
    super(Group1, self).save()
    if not self.urlhash:
        if self.user.profile.user_type == 'Business User':
            self.urlhash = 'B' + str(self.User.id) + ('00') + str(self.id)
            <b>self.__class__.objects.filter.(pk=self.pk).update(urlhash=urlhash)</b>
        else:
            self.urlhash = 'P' + str(self.User.id) + ('00') + str(self.id)
            <b>self.__class__.objects.filter.(pk=self.pk).update(urlhash=urlhash)

UPDATE
I for got one point that the instance should be again updated after calling the the save() method. So I had used the statement

self.__class__.objects.filter.(pk=self.pk).update(urlhash=urlhash)

Thanks to @sanip for the idea got from his answer

👤JPG

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