understand models relationship . Its python, Django my q is ideologic

Question

Im developing CRM system in which i have 2 models

Order

---

items_in_order=models.ManyToManyField(Item)

Item

---

name=models.Charfield()
price=models.DecimalField()

---

As you can see Orderlist can have multiple items in it.

I want to have order list in which i can add an items with quantity.

For example: ORDER

yellow flower (5$) | 10 pcs blue flower (3$) | 3pcs

For now i can only add these two flowers to order, without quantity. How these can be implemented ?

Answer 1

You can use the through model that you get while using ManyToMany fields

class Order(models.Model):
    items_in_order=models.ManyToManyField('Item', through='Quantity')

class Item(models.Mode):
    name=models.Charfield()
    price=models.DecimalField()

class Quantity(models.Model):
    quantity = models.IntegerField()
    order = models.ForeignKey('Order')
    item = models.ForeignKey('Item')

Documentation on extra fields on ManyToMany