CODEWITHSUNDEEP
djangodjango-admininline-formset
ginad
ginad

Reputation: 1973

how to limit django admin inline formsets

How do you limit the inline formset in django admin?

Problem:

I have a table A with 1 to n relationship with B. Table A should have at least one Table B item and a max of 5 Table B items.

Upvotes: 28

Views: 27786

Answers (3)

Akaisteph7
Akaisteph7

Reputation: 6486

You can do this using a Django admin inline formset.

from django.forms.models import BaseInlineFormSet

MAX_RECORDS = 10

class ExampleFormSet(BaseInlineFormSet): 
    def get_queryset(self) :
        qs = super(ExampleFormSet, self).get_queryset()
        return qs.order_by('-date_started')[:MAX_RECORDS]

class ExampleAdmin(models.TabularInline):
    model = models.Example
    formset = ExampleFormSet

Source

This way, you can filter, order, and limit your results however you want.

Upvotes: 2

Skratt
Skratt

Reputation: 408

The enabling / disabling of the add button in an inline is managed through the _has_add_permission method

you could add to your inline class:

def _has_add_permission(self, request, obj=None):
   # add/remove possibility to add a line to an inline
    if obj.table_b_items.count() < 5:
        return True
    else:
        return False

Upvotes: 0

Yuji &#39;Tomita&#39; Tomita
Yuji &#39;Tomita&#39; Tomita

Reputation: 118458

http://docs.djangoproject.com/en/dev/ref/contrib/admin/#inlinemodeladmin-options

Specify max_num in your Inline definition to limit the number.

extra specifies how many blank inlines to show.

Is the 1 inline required? As in you want to trigger a validation error if table B isn't filled with at least 1 row?

Upvotes: 49

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