refs #157, Remove a useless Prefetch on retrieve view

Author: moumoutte

demo/tests/perfs/tests_integration.perf.yml

@@ -8,7 +8,6 @@ TestContextFormEndPoint.test_queryset:
 - db: SELECT ... FROM "formidable_default" WHERE "formidable_default"."field_id" IN (...)
 UpdateFormTestCase.test_queryset_on_get:
 - db: 'SELECT ... FROM "formidable_formidable" WHERE "formidable_formidable"."id" = #'
-- db: SELECT ... FROM "formidable_field" WHERE "formidable_field"."form_id" IN (#) ORDER BY "formidable_field"."order" ASC
 - db: 'SELECT ... FROM "formidable_field" WHERE "formidable_field"."form_id" = # ORDER BY "formidable_field"."order" ASC'
 - db: SELECT ... FROM "formidable_item" WHERE "formidable_item"."field_id" IN (...) ORDER BY "formidable_item"."order" ASC
 - db: SELECT ... FROM "formidable_default" WHERE "formidable_default"."field_id" IN (...)

formidable/views.py

@@ -5,7 +5,6 @@
 
 from django.conf import settings
 from django.core.exceptions import ImproperlyConfigured
-from django.db.models import Prefetch
 
 import six
 from rest_framework import exceptions
@@ -21,7 +20,7 @@
     FileFieldBuilder, FormFieldFactory, SkipField
 )
 from formidable.forms.validations.presets import presets_register
-from formidable.models import Field, Formidable
+from formidable.models import Formidable
 from formidable.serializers import FormidableSerializer, SimpleAccessSerializer
 from formidable.serializers.forms import ContextFormSerializer
 from formidable.serializers.presets import PresetsSerializer
@@ -176,11 +175,6 @@ class FormidableDetail(six.with_metaclass(MetaClassView,
     success_callback_settings = 'FORMIDABLE_POST_UPDATE_CALLBACK_SUCCESS'
     failure_callback_settings = 'FORMIDABLE_POST_UPDATE_CALLBACK_FAIL'
 
-    def get_queryset(self):
-        qs = super(FormidableDetail, self).get_queryset()
-        field_qs = Field.objects.order_by('order')
-        return qs.prefetch_related(Prefetch('fields', queryset=field_qs))
-
 
 class FormidableCreate(six.with_metaclass(MetaClassView,
                        CallbackMixin, CreateAPIView)):