django 1.5 admin inline extra

Question

I have some models with a large number of inlines. Since not all are needed for every object I declared the inline model with extra = 0 so that a small add + appeared on the inline.

However, this seems to no longer work in django 1.5. If extra = 0 is set, the inline is no longer editable.

Is there a way to get the 1.4 behavior into 1.5?

Example Code:

class ModelInline(admin.StackedInline):
    model = MyModel
    extra = 0

class OtherModelAdmin(admin.ModelAdmin)
    inlines = [ModelInline]

admin.site.register(OtherModel, OtherModelAdmin)

Edit (some screens):

Django 1.4:

Django 1.5:

(Hinzufügen == add)

Answer 1

This is already happen before.

The new javascript made this impossible because the "Add Another" button 
was controlled by max_num, and ignored a value of 0.
The javascript ignored a value of 0 because max_num has a default value of 0, 
and all the code using it had taken to equating max_num = 0 with being "off". 
So you can't actually have a maximum of 0. It's not possible.

There is a patch create by Gabrial Hurley to restores desired behaviour without breaking anything else. This is 3years ago and I don't know if it still working for Django 1.5. Just try :)

https://code.djangoproject.com/attachment/ticket/13023/13023_inlines_patch.diff

Here is the ticket for that same bug (3 years ago):

https://code.djangoproject.com/ticket/13023

Answer 2

I ran into the same issue because I had the static admin content in a directory that was outside of django's install. Copying the Django 1.5 static content from django/contrib/admin/static/admin/js/ to STATIC_ROOT/admin/js fixed the issue.

Answer 3

the better solution would be to override the get_extra method of the inline itself. This works in Django 1.9, though i cannot say for earlier versions

Answer 4

All you have to do is add extra field.

---

For Example:

1. models.py:

class Category(models.Model):
    name = models.CharField(max_length=50)
    def __str__(self):
        return self.name


class Product(models.Model):
    name = models.CharField(max_length=50)
    price = models.IntegerField()
    category = models.ForeignKey(Category, on_delete=models.CASCADE)

    def __str__(self):
        return '{}, {}'.format(self.name, self.company)

2. admin.py:

    class InlinesProduct(admin.StackedInline):
        model = Product
        extra = 0     #<=== For remove empty fields from admin view

    @admin.register(Category)
    class CategoryAdmin(admin.ModelAdmin):
        inlines = [InlinesProduct]