How To Fetch Related Category Products in Python Django From Database Table?

Question

I have create some apps inside my Django project, they are called Coupon and Store , both of them are related to each other. For instance, there can be many coupons related a store (Coupon1, Coupon2 belongs to Store1).

class Coupon(models.Model): 
    store = models.ForeignKey(Store, on_delete=models.DO_NOTHING) 
    title = models.CharField(max_length=200) 
    ...

    def __str__(self): 
        return self.title

class Store(models.Model): 
    name = models.CharField(max_length=200) 
    description = models.TextField(blank=True) 
    ...

    def __str__(self): 
        return self.name

What I'd like to accomplish is when a user clicks on any of these coupons (Coupon1, Coupon2), the user should see a list of all coupons in a seperate view which is related to Store1.

How should I do it ?

Answer 1

If I correctly understand what you want, it's gonna be that way:

# Get the Coupon1 instance
coupon = Coupon.objects.filter(name="Coupon1")
# Get all coupons related to the same store as Coupon1
coupons_from_same_store = Coupon.objects.filter(store=coupon.store)

Answer 2

let's say I have the ID of the coupon in URL called coupen_id ,

coupen = Coupen.objects.get(pk=coupen_id)
coupons = Coupon.objects.filter(store_id=coupen.store.id)
print(store_id)