Django Admin - Disable the 'Add' action for a specific model

Question

It is easy, just overload has_add_permission method in your Admin class like so:

class MyAdmin(admin.ModelAdmin):
     def has_add_permission(self, request, obj=None):
        return False

I think this will help you.. below code must be in admin.py file

@admin.register(Author)
class AuthorAdmin(admin.ModelAdmin):
    list_display = ('name', )
    list_filter = ('name', )
    search_fields = ('name', )
    list_per_page = 20

    # This will help you to disbale add functionality
    def has_add_permission(self, request):
        return False

    # This will help you to disable delete functionaliyt
    def has_delete_permission(self, request, obj=None):
        return False

In additon to the above as posted by

    # This will help you to disable change functionality
    def has_change_permission(self, request, obj=None):
        return False

By default syncdb creates 3 security permissions for each model:

1. Create (aka add)
2. Change
3. Delete

If your logged in as Admin, you get EVERYTHING no matter what.

But if you create a new user group called "General Access" (for example) then you can assign ONLY the CHANGE and DELETE permissions for all of your models.

Then any logged in user that is a member of that group will not have "Create" permission, nothing related to it will show on the screen.

Just copy code from another answer

# In admin
# make the related field can't be added
    def get_form(self, request, obj=None, **kwargs):
        form = super().get_form(request, obj, **kwargs)
        form.base_fields['service'].widget.can_add_related = False
        return form

In my case I use inline

# In inline formset e.g. admin.TabularInline
# disable all
    def get_formset(self, request, obj=None, **kwargs):
        formset = super().get_formset(request, obj, **kwargs)
        service = formset.form.base_fields['service']
        service.widget.can_add_related = service.widget.can_change_related = service.widget.can_delete_related = False
        return formset

in service = formset.form.base_fields['service'] base_fields is the fields defined in model

if defined in the form use:

product = formset.form.declared_fields['product']

see also