Readonly models in Django admin interface?

Question

How can I make a model completely read-only in the admin interface? It\'s for a kind of log table, where I\'m using the admin features to search, sort, filter etc, but there

Answer 1

I have written a generic class to handle ReadOnly view depending on User permissions, including inlines ;)

In models.py:

class User(AbstractUser):
    ...
    def is_readonly(self):
        if self.is_superuser:
            return False
        # make readonly all users not in "admins" group
        adminGroup = Group.objects.filter(name="admins")
        if adminGroup in self.groups.all():
            return False
        return True

In admin.py:

# read-only user filter class for ModelAdmin
class ReadOnlyAdmin(admin.ModelAdmin):
    def __init__(self, *args, **kwargs):
        # keep initial readonly_fields defined in subclass
        self._init_readonly_fields = self.readonly_fields
        # keep also inline readonly_fields
        for inline in self.inlines:
            inline._init_readonly_fields = inline.readonly_fields
        super().__init__(*args,**kwargs)
    # customize change_view to disable edition to readonly_users
    def change_view( self, request, object_id, form_url='', extra_context=None ):
        context = extra_context or {}
        # find whether it is readonly or not 
        if request.user.is_readonly():
            # put all fields in readonly_field list
            self.readonly_fields = [ field.name for field in self.model._meta.get_fields() if not field.auto_created ]
            # readonly mode fer all inlines
            for inline in self.inlines:
                inline.readonly_fields = [field.name for field in inline.model._meta.get_fields() if not field.auto_created]
            # remove edition buttons
            self.save_on_top = False
            context['show_save'] = False
            context['show_save_and_continue'] = False
        else:
            # if not readonly user, reset initial readonly_fields
            self.readonly_fields = self._init_readonly_fields
            # same for inlines
            for inline in self.inlines:
                inline.readonly_fields = self._init_readonly_fields
        return super().change_view(
                    request, object_id, form_url, context )
    def save_model(self, request, obj, form, change):
        # disable saving model for readonly users
        # just in case we have a malicious user...
        if request.user.is_readonly():
            # si és usuari readonly no guardem canvis
            return False
        # if not readonly user, save model
        return super().save_model( request, obj, form, change )

Then, we can just inherit normally our classes in admin.py:

class ContactAdmin(ReadOnlyAdmin):
    list_display = ("name","email","whatever")
    readonly_fields = ("updated","created")
    inlines = ( PhoneInline, ... )