from datetime import datetime from django.conf import settings from django.contrib import admin from django.contrib.admin.util import display_for_field, label_for_field, lookup_field from django.contrib.admin.util import NestedObjects from django.contrib.admin.views.main import EMPTY_CHANGELIST_VALUE from django.contrib.sites.models import Site from django.db import models, DEFAULT_DB_ALIAS from django.test import TestCase from django.utils import unittest from django.utils.formats import localize from models import Article, Count, Event, Location class NestedObjectsTests(TestCase): """ Tests for ``NestedObject`` utility collection. """ def setUp(self): self.n = NestedObjects(using=DEFAULT_DB_ALIAS) self.objs = [Count.objects.create(num=i) for i in range(5)] def _check(self, target): self.assertEqual(self.n.nested(lambda obj: obj.num), target) def _connect(self, i, j): self.objs[i].parent = self.objs[j] self.objs[i].save() def _collect(self, *indices): self.n.collect([self.objs[i] for i in indices]) def test_unrelated_roots(self): self._connect(2, 1) self._collect(0) self._collect(1) self._check([0, 1, [2]]) def test_siblings(self): self._connect(1, 0) self._connect(2, 0) self._collect(0) self._check([0, [1, 2]]) def test_non_added_parent(self): self._connect(0, 1) self._collect(0) self._check([0]) def test_cyclic(self): self._connect(0, 2) self._connect(1, 0) self._connect(2, 1) self._collect(0) self._check([0, [1, [2]]]) def test_queries(self): self._connect(1, 0) self._connect(2, 0) # 1 query to fetch all children of 0 (1 and 2) # 1 query to fetch all children of 1 and 2 (none) # Should not require additional queries to populate the nested graph. self.assertNumQueries(2, self._collect, 0) class UtilTests(unittest.TestCase): def test_values_from_lookup_field(self): """ Regression test for #12654: lookup_field """ SITE_NAME = 'example.com' TITLE_TEXT = 'Some title' CREATED_DATE = datetime.min ADMIN_METHOD = 'admin method' SIMPLE_FUNCTION = 'function' INSTANCE_ATTRIBUTE = 'attr' class MockModelAdmin(object): def get_admin_value(self, obj): return ADMIN_METHOD simple_function = lambda obj: SIMPLE_FUNCTION article = Article( site=Site(domain=SITE_NAME), title=TITLE_TEXT, created=CREATED_DATE, ) article.non_field = INSTANCE_ATTRIBUTE verifications = ( ('site', SITE_NAME), ('created', localize(CREATED_DATE)), ('title', TITLE_TEXT), ('get_admin_value', ADMIN_METHOD), (simple_function, SIMPLE_FUNCTION), ('test_from_model', article.test_from_model()), ('non_field', INSTANCE_ATTRIBUTE) ) mock_admin = MockModelAdmin() for name, value in verifications: field, attr, resolved_value = lookup_field(name, article, mock_admin) if field is not None: resolved_value = display_for_field(resolved_value, field) self.assertEqual(value, resolved_value) def test_null_display_for_field(self): """ Regression test for #12550: display_for_field should handle None value. """ display_value = display_for_field(None, models.CharField()) self.assertEqual(display_value, EMPTY_CHANGELIST_VALUE) display_value = display_for_field(None, models.CharField( choices=( (None, "test_none"), ) )) self.assertEqual(display_value, "test_none") display_value = display_for_field(None, models.DateField()) self.assertEqual(display_value, EMPTY_CHANGELIST_VALUE) display_value = display_for_field(None, models.TimeField()) self.assertEqual(display_value, EMPTY_CHANGELIST_VALUE) # Regression test for #13071: NullBooleanField has special # handling. display_value = display_for_field(None, models.NullBooleanField()) expected = u'None' % settings.ADMIN_MEDIA_PREFIX self.assertEqual(display_value, expected) display_value = display_for_field(None, models.DecimalField()) self.assertEqual(display_value, EMPTY_CHANGELIST_VALUE) display_value = display_for_field(None, models.FloatField()) self.assertEqual(display_value, EMPTY_CHANGELIST_VALUE) def test_label_for_field(self): """ Tests for label_for_field """ self.assertEqual( label_for_field("title", Article), "title" ) self.assertEqual( label_for_field("title2", Article), "another name" ) self.assertEqual( label_for_field("title2", Article, return_attr=True), ("another name", None) ) self.assertEqual( label_for_field("__unicode__", Article), "article" ) self.assertEqual( label_for_field("__str__", Article), "article" ) self.assertRaises( AttributeError, lambda: label_for_field("unknown", Article) ) def test_callable(obj): return "nothing" self.assertEqual( label_for_field(test_callable, Article), "Test callable" ) self.assertEqual( label_for_field(test_callable, Article, return_attr=True), ("Test callable", test_callable) ) self.assertEqual( label_for_field("test_from_model", Article), "Test from model" ) self.assertEqual( label_for_field("test_from_model", Article, return_attr=True), ("Test from model", Article.test_from_model) ) self.assertEqual( label_for_field("test_from_model_with_override", Article), "not What you Expect" ) self.assertEqual( label_for_field(lambda x: "nothing", Article), "--" ) class MockModelAdmin(object): def test_from_model(self, obj): return "nothing" test_from_model.short_description = "not Really the Model" self.assertEqual( label_for_field("test_from_model", Article, model_admin=MockModelAdmin), "not Really the Model" ) self.assertEqual( label_for_field("test_from_model", Article, model_admin = MockModelAdmin, return_attr = True ), ("not Really the Model", MockModelAdmin.test_from_model) ) def test_related_name(self): """ Regression test for #13963 """ self.assertEqual( label_for_field('location', Event, return_attr=True), ('location', None), ) self.assertEqual( label_for_field('event', Location, return_attr=True), ('awesome event', None), ) self.assertEqual( label_for_field('guest', Event, return_attr=True), ('awesome guest', None), )