Django how to check if a table is being used as a foreignkey of another table

Question

So, I have two models, Order and Orders, and for each item that I have in my session(cart)
Im creating an Order_object(saving in database) and after each item is saved I want to do a check for every Order telling which ones are not a foreign key in Orders, if not, create an Orders_object than add each Order who is not a foreign key of Orders And I wish that each Orders have multiple Order

Models.py

class Order(models.Model):
   ----fields---

class Orders(models.Model):
 order = models.ManyToManyField(Order)

 ----other fields ------

Asked By: Kaynan Kaynan Felipe Rodrigues

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Source

Answer 1

You could do something like that :

order = get_object_or_404(Order, pk=pk)
for order_object in Order:
    if order_object.orders.exists():
       # Do something
     else:
       # Do something

Answered By: Gaëtan GR

Answer 2

order_all = Order.objects.all()
orders_all = Orders.objects.all()
for order_object in order_all:
    the_order_object_is_not_fk_in_orders = True
    for orders in orders_all:
        for orders_order_object in orders.order.all():
          if orders_order_object == order_object:
            the_order_object_is_not_fk_in_orders = False
            break
    if the_order_object_is_not_fk_in_orders == True:
        #do something

Answered By: Kaynan Kaynan Felipe Rodrigues

Django how to check if a table is being used as a foreignkey of another table

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