Question

I want to create a row in one of my databases’ tables every time a row in a particular table is created.
For example:

class Group(models.Model):
    name               = models.CharField(max_length=50)
    slug               = models.SlugField(unique = True)
    about              = models.TextField(blank = True, null=True)

every time a new row in this table is created, I want to add a new row in a Link class

class Link(models.Model):
    name               = models.CharField(max_length=50)
    slug               = models.SlugField(unique = True)
    location           = models.CharField(max_length= 200)

Where the group’s slug will be the a part of the Link’s location.
How can I do that?

Answer 1

This is where the post_save signal comes in. You could add this to the bottom of your models.py:

from django.db.models.signals import post_save

def create_group_links(instance, created, **kwargs):
    if created:
        Link.objects.create(name='FOO', slug='BAR', location='LOC' + instance.slug)
post_save.connect(create_group_links, sender=Group)