Django code snippet that will treat a save button click (when URL has ?_popup=1) as 'Save and continue'. This is useful when you need to save the object before allowing some changes to be made on it

admin.py

class MyAdmin(admin.ModelAdmin):
    def response_add(self, request, obj, post_url_continue=None):
        # If object is added in popup, treat as continue
        if '_popup' in request.POST:
            opts = obj._meta
            pk_value = obj._get_pk_val()
            preserved_filters = self.get_preserved_filters(request)
            msg_dict = {'name': force_text(opts.verbose_name), 'obj': force_text(obj)}
            msg = _('The %(name)s "%(obj)s" was added successfully. You may edit it again below.') % msg_dict
            self.message_user(request, msg, messages.SUCCESS)
            if post_url_continue is None:
                post_url_continue = reverse('admin:%s_%s_change' %
                    (opts.app_label, opts.model_name),
                    args=(quote(pk_value),),
                    current_app=self.admin_site.name)
            post_url_continue = add_preserved_filters({'preserved_filters': preserved_filters, 'opts': opts}, post_url_continue)
            return HttpResponseRedirect(post_url_continue + '?_popup=1')
        return super(MyAdmin, self).response_add(request, obj, post_url_continue)
 
    def response_change(self, request, obj):
        if '_popup' in request.POST:
            pk_value = obj._get_pk_val()
            to_field = request.POST.get('_to_field')
            if to_field:
                attr = str(to_field)
            else:
                attr = obj._meta.pk.attname
            value = obj.serializable_value(attr)
            return SimpleTemplateResponse('admin/popup_response.html', {
                'pk_value': escape(pk_value),
                'value': escape(value),
                'obj': escapejs(obj)
            })
        return super(MyAdmin, self).response_change(request, obj)