ManyToManyField shows all the instances instead of related

Question

My models:

class CartItem(models.Model):
    product = models.ForeignKey(Product, on_delete=models.CASCADE)
    quantity = models.PositiveIntegerField(default=1)
    item_price = models.DecimalField(max_digits=9, decimal_places=2,default=0.00)

class Cart(models.Model):
    items = models.ManyToManyField(CartItem, blank=True)
    total = models.DecimalField(max_digits=9, decimal_places=2,default=0.00)

When I add CartItem instance to a cart and then look at the Cart instance in admin dashboard, I see all the CartItem instances instead of the one's I added to the cart. How do I fix it? That's what I mean:

But I only added Dell and Canon instances.

Yes this is what it is supposed to be. Its the edit page, you will see all the choices to select for the field and preselected choices which already exist, which are highlighted. — Sachin, Sep 02 '18 at 14:51
I see. Would you suggest a way to show the selected choices in admin dashboard? — Nikita Tonkoskur, Sep 02 '18 at 14:53
In the list view? If yes, see [this](https://stackoverflow.com/a/18108586/5312750). — Sachin, Sep 02 '18 at 14:54
What would be the point of only showing the selected ones? Then you wouldn't be able to select any others. — Daniel Roseman, Sep 02 '18 at 15:11

score 0 · Answer 1 · answered Sep 02 '18 at 15:41

0

The selected items are displayed right as highlighted. If you want selected items display in another input, use FilteredSelectMultiple widget as:

forms.ModelMultipleChoiceField(None, widget=FilteredSelectMultiple("Items", False, attrs={'rows':'10'}))

answered Sep 02 '18 at 15:41

Gang Li

26
2

you need to replace 'None' use your model. – Gang Li Sep 02 '18 at 15:42

ManyToManyField shows all the instances instead of related

1 Answers1