Fix get_absolute_url for deleted persons.

Fix #845

openslides/utils/person/api.py

@@ -51,6 +51,20 @@ class Person(object):
         """
         return ''
 
+    def get_absolute_url(self, link='detail'):
+        """
+        Return an absolute url for the person.
+
+        The argument 'link' affects which url it is. Typically it is one of:
+        * detail
+        * edit
+        * delete
+
+        You should raise an 'ValueError', if your person does not have
+        one of this links.
+        """
+        raise ValueError('This person object has no url.')
+
 
 class Persons(object):
     """

openslides/utils/person/models.py

@@ -81,7 +81,7 @@ class PersonMixin(object):
                                  % self)
 
     def __unicode__(self):
-        return 'MyPerson: %s' % self.person_id
+        return self.person_id
 
     def prepare_database_save(self, field):
         if type(field) is PersonField:

openslides/utils/templatetags/tags.py

@@ -36,7 +36,10 @@ def trans(value):
 @register.simple_tag
 def model_url(object, link='view'):
     # TODO: Rename to object_url
+    try:
         return object.get_absolute_url(link)
+    except ValueError:
+        return ''
 
 
 @register.filter

tests/person_api/models.py

@@ -13,6 +13,9 @@ class TestPerson(PersonMixin, models.Model):
     def __unicode__(self):
         return self.name
 
+    def get_absolute_url(self, link='detail'):
+        return 'absolute_url_of_test_person'
+
 
 class TestPersonToPerson(object):
     def __init__(self, person_prefix_filter=None, id_filter=None):

tests/person_api/tests.py

@@ -15,11 +15,12 @@ from django.db.models.query import EmptyQuerySet
 from django.contrib.auth.models import AnonymousUser
 
 from openslides.utils.test import TestCase
+from openslides.utils.person.api import get_person
 
 from .models import TestPerson, TestModel
 
 
-class ItemTest(TestCase):
+class PersonTest(TestCase):
     def setUp(self):
         self.person1 = TestPerson.objects.create(name='test1')
 
@@ -45,3 +46,12 @@ class ItemTest(TestCase):
                 AttributeError,
                 'You can not save \'<type \'int\'>\' into a person field.'):
             TestModel.objects.create(person=5)
+
+    def test_get_absolute_url_with_deleted_person(self):
+        person2 = TestPerson.objects.create(name='test2')
+        self.assertEqual(person2.get_absolute_url(), 'absolute_url_of_test_person')
+        person_id = person2.person_id
+        self.assertEqual(get_person(person_id).get_absolute_url(), 'absolute_url_of_test_person')
+        person2.delete()
+        with self.assertRaisesRegexp(ValueError, 'This person object has no url.'):
+            get_person(person_id).get_absolute_url()