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from datetime import datetime
import unittest
from django.conf import settings
from django.db import models
from django.utils.formats import localize
from django.test import TestCase
from django.contrib import admin
from django.contrib.admin.util import display_for_field, label_for_field, lookup_field
from django.contrib.admin.views.main import EMPTY_CHANGELIST_VALUE
from django.contrib.sites.models import Site
from django.contrib.admin.util import NestedObjects
from models import Article, Count
class NestedObjectsTests(TestCase):
"""
Tests for ``NestedObject`` utility collection.
"""
def setUp(self):
self.n = NestedObjects()
self.objs = [Count.objects.create(num=i) for i in range(5)]
def _check(self, target):
self.assertEquals(self.n.nested(lambda obj: obj.num), target)
def _add(self, obj, parent=None):
# don't bother providing the extra args that NestedObjects ignores
self.n.add(None, None, obj, None, parent)
def test_unrelated_roots(self):
self._add(self.objs[0])
self._add(self.objs[1])
self._add(self.objs[2], self.objs[1])
self._check([0, 1, [2]])
def test_siblings(self):
self._add(self.objs[0])
self._add(self.objs[1], self.objs[0])
self._add(self.objs[2], self.objs[0])
self._check([0, [1, 2]])
def test_duplicate_instances(self):
self._add(self.objs[0])
self._add(self.objs[1])
dupe = Count.objects.get(num=1)
self._add(dupe, self.objs[0])
self._check([0, 1])
def test_non_added_parent(self):
self._add(self.objs[0], self.objs[1])
self._check([0])
def test_cyclic(self):
self._add(self.objs[0], self.objs[2])
self._add(self.objs[1], self.objs[0])
self._add(self.objs[2], self.objs[1])
self._add(self.objs[0], self.objs[2])
self._check([0, [1, [2]]])
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'<img src="%simg/admin/icon-unknown.gif" alt="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.assertEquals(
label_for_field("title", Article),
"title"
)
self.assertEquals(
label_for_field("title2", Article),
"another name"
)
self.assertEquals(
label_for_field("title2", Article, return_attr=True),
("another name", None)
)
self.assertEquals(
label_for_field("__unicode__", Article),
"article"
)
self.assertEquals(
label_for_field("__str__", Article),
"article"
)
self.assertRaises(
AttributeError,
lambda: label_for_field("unknown", Article)
)
def test_callable(obj):
return "nothing"
self.assertEquals(
label_for_field(test_callable, Article),
"Test callable"
)
self.assertEquals(
label_for_field(test_callable, Article, return_attr=True),
("Test callable", test_callable)
)
self.assertEquals(
label_for_field("test_from_model", Article),
"Test from model"
)
self.assertEquals(
label_for_field("test_from_model", Article, return_attr=True),
("Test from model", Article.test_from_model)
)
self.assertEquals(
label_for_field("test_from_model_with_override", Article),
"not What you Expect"
)
self.assertEquals(
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.assertEquals(
label_for_field("test_from_model", Article, model_admin=MockModelAdmin),
"not Really the Model"
)
self.assertEquals(
label_for_field("test_from_model", Article,
model_admin = MockModelAdmin,
return_attr = True
),
("not Really the Model", MockModelAdmin.test_from_model)
)
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