Django 1.7 removing Add button from inline form

Question

I'm having problems achieving a (probably) rather simple task. I have fully modifiable models (Prodotto, Comune) which are shown as "addable" fields, as shown in picture below. What I'd rather not see is the + (add) button for such fields, hence to remove their "addable" propriety in this form. I've tried setting has_add_permission=False within the two models, but it would make it impossibile to add new objects to such models completely, not only in this form.

How can I do that?

EDIT: To clarify my need, I'd like NOT to have the "+"s next to the fields of the FK models, but I do still want to be able to add whole new inlines. To be as clear as possible, as I wrote in a comment, considering a scenario such as this: https://code.djangoproject.com/attachment/ticket/20367/django_custom_user_admin_form.png I just need to have the "+"s next to Groups and Country removed.

EXISTING CODE:

models.py (of the specific application involved):

from django.db import models

from smart_selects.db_fields import ChainedForeignKey

from apps.comune.models import Comune, Cap


class Prodotto(models.Model):
    SETTORE_CHOICES = (
        ('CAL', 'Accessori calzature'),
        ('ALI', 'Alimentari'),
        ('ARA', 'Arredamenti e accessori'),
        ('AEM', 'Auto e moto'),
        ('CAL', 'Calzature'),
        ('CEG', 'Cartaria e grafica'),
        ('CEP', 'Concerie e pelletterie'),
        ('EDI', 'Edilizia'),
        ('INV', 'Industrie varie'),
        ('IST', 'Istruzione'),
        ('MDC', 'Materiali da costruzione'),
        ('MMC', 'Metalmeccanica'),
        ('SEI', 'Serramenti e infissi'),
        ('STM', 'Strumenti musicali'),
        ('TEI', 'Terziario innovativo'),
        ('TAB', 'Tessile abbigliamento'),
        ('TCP', 'Trasporto cose e persone'),
        ('VAR', 'Vari'),
    )
    nome = models.CharField(max_length=100)
    settore = models.CharField(max_length=40, choices=SETTORE_CHOICES)

    class Meta:
        verbose_name_plural = "prodotti"
        verbose_name = "prodotto"
        ordering = ['nome']

    def __unicode__(self):
        return self.nome.capitalize()


class Cliente(models.Model):
    TIPOLOGIA_CHOICES = (
        ('AR', 'Artigiano'),
        ('CO', 'Commerciante'),
        ('GI', 'Grande impresa'),
        ('PI', 'Piccola impresa'),
    )
    FORMA_SOCIETARIA_CHOICES = (
        ('SNC', 'S.n.c.'),
        ('SRL', 'S.r.l.'),
        ('SPA', 'S.p.A.'),
        ('SAS', 'S.a.s.'),
        ('COOP', 'Coop.A.r.l.'),
        ('DI', 'D.I.'),
        ('SCARL', 'S.c.a.r.l.'),
        ('SCPA', 'S.c.p.a.'),
    )
    SETTORE_CHOICES = (
        ('CAL', 'Accessori calzature'),
        ('ALI', 'Alimentari'),
        ('ARA', 'Arredamenti e accessori'),
        ('AEM', 'Auto e moto'),
        ('CAL', 'Calzature'),
        ('CEG', 'Cartaria e grafica'),
        ('CEP', 'Concerie e pelletterie'),
        ('EDI', 'Edilizia'),
        ('INV', 'Industrie varie'),
        ('IST', 'Istruzione'),
        ('MDC', 'Materiali da costruzione'),
        ('MMC', 'Metalmeccanica'),
        ('SEI', 'Serramenti e infissi'),
        ('STM', 'Strumenti musicali'),
        ('TEI', 'Terziario innovativo'),
        ('TAB', 'Tessile abbigliamento'),
        ('TCP', 'Trasporto cose e persone'),
        ('VAR', 'Vari'),
    )
    ragione_sociale = models.CharField(max_length=200)
    forma_societaria = models.CharField(
        max_length=5, choices=FORMA_SOCIETARIA_CHOICES)
    titolare = models.CharField(max_length=100, blank=True)
    partita_iva = models.CharField(
        max_length=11, verbose_name='Partita IVA', unique=True)
    tipologia = models.CharField(max_length=2, choices=TIPOLOGIA_CHOICES)
    settore = models.CharField(max_length=40, choices=SETTORE_CHOICES)
    prodotto = models.ManyToManyField(Prodotto, blank=True)

    class Meta:
        verbose_name_plural = "clienti"
        verbose_name = "cliente"

    def __unicode__(self):
        return self.ragione_sociale.capitalize()


class Sede(models.Model):
    nome = models.CharField(max_length=100)
    indirizzo = models.CharField(max_length=200, blank=True)
    cliente = models.ForeignKey(Cliente)
    comune = models.ForeignKey(Comune)
    cap = ChainedForeignKey(
        Cap,
        chained_field="comune",
        chained_model_field="comune",
        show_all=False,
        auto_choose=True,
    )

    class Meta:
        verbose_name_plural = "sedi"
        verbose_name = "sede"
        ordering = ['nome']

    def __unicode__(self):
        return self.nome.capitalize() + ", " + self.indirizzo

admin.py (of the specific application involved):

from django.contrib import admin

from .models import Cliente, Prodotto, Sede
from apps.recapito.models import RecapitoCliente


class SedeInline(admin.TabularInline):
    model = Sede
    extra = 1

    def provincia(self, obj):
        return obj.comune.provincia

    readonly_fields = ['provincia', ]


class RecapitoInline(admin.TabularInline):
    model = RecapitoCliente
    extra = 1
    list_fields = ['cliente', 'tipo', 'recapito', ]


@admin.register(Cliente)
class ClienteAdmin(admin.ModelAdmin):
    list_display = [
        'ragione_sociale', 'forma_societaria', 'titolare', 'partita_iva', ]
    list_filter = ['forma_societaria', ]
    search_fields = ['ragione_sociale', ]
    inlines = [RecapitoInline, SedeInline]


admin.site.register(Prodotto)

The admin interface of this app produces this:

Shortcut links 1 and 2 are the ones I need removed, being referred to columns (FKs) inside my inline classes. Shortcut links 3 and 4 are to be kept, since they refers to the inlines themselves.

Answer 1

To remove the "Add another" option, please add the below method in admin inline class.

def has_add_permission(self, request):
    return False

Similarly if you want to disable "Delete?" option, add the following method in admin inline class.

def has_delete_permission(self, request, obj=None):
    return False