Remove add another from django admin

Question

I have an inline model in Django admin which is having OneToOneField relation with the parent.

class Child(models.Model):
 parent = models.OneToOneField(Parent)
 received_on = models.DateField(null=True,)

In admin Inline I don't want to show "add another button" so I have done something like this:-

class CampaignInfluencerShippingTrackingInline(admin.TabularInline):
    model = Child
    can_delete = False
    extra = 0
    fields = ['received_on']

    def has_add_permission(self, request):
         return False

But it is still showing add another button the problem is with relation with the parent as it is having OneToOneField if I try with ForeignKey with same code add another button is not showing but with OneToOneField it is always showing.

Can anyone suggest me how it is working and what I can do to remove add another button from the Inline child?

I am able to add the model inline in parent but my question is related how to remove "add another button" from inline model.

Answer 1

just add max_num=0 or what you want

class CampaignInfluencerShippingTrackingInline(admin.TabularInline):
    model = Child
    can_delete = False
    extra = 0
    max_num=0
    fields = ['received_on']