Fixed #9498 -- Handle a formset correctly when the foreign key is not available (for now).

This case pops up with generic foreign key inlines after [9297]. Added tests
to handle future regressions with generic foreign key inlines in the admin.

Thanks markus and danielr for patches.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@9412 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/admin/helpers.py

@@ -108,8 +108,9 @@ class InlineAdminFormSet(object):
             yield InlineAdminForm(self.formset, form, self.fieldsets, self.opts.prepopulated_fields, None)
 
     def fields(self):
+        fk = getattr(self.formset, "fk", None)
         for field_name in flatten_fieldsets(self.fieldsets):
-            if self.formset.fk.name == field_name:
+            if fk and fk.name == field_name:
                 continue
             yield self.formset.form.base_fields[field_name]
 
@@ -150,7 +151,11 @@ class InlineAdminForm(AdminForm):
         return AdminField(self.form, self.formset._pk_field.name, False)
     
     def fk_field(self):
-        return AdminField(self.form, self.formset.fk.name, False)
+        fk = getattr(self.formset, "fk", None)
+        if fk:
+            return AdminField(self.form, fk.name, False)
+        else:
+            return ""
 
     def deletion_field(self):
         from django.forms.formsets import DELETION_FIELD_NAME
@@ -166,8 +171,9 @@ class InlineFieldset(Fieldset):
         super(InlineFieldset, self).__init__(*args, **kwargs)
         
     def __iter__(self):
+        fk = getattr(self.formset, "fk", None)
         for field in self.fields:
-            if self.formset.fk.name == field:
+            if fk and fk.name == field:
                 continue
             yield Fieldline(self.form, field)
             

tests/regressiontests/generic_inline_admin/fixtures/model-data.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<django-objects version="1.0">
+    <object pk="1" model="generic_inline_admin.Episode">
+        <field type="CharField" name="name">This Week in Django</field>
+    </object>
+    <object pk="1" model="generic_inline_admin.Media">
+        <field type="ForeignKey" name="content_type">13</field>
+        <field type="PositiveIntegerField" name="object_id">1</field>
+        <field type="URLField" name="url">http://example.com/podcast.mp3</field>
+    </object>
+</django-objects>

tests/regressiontests/generic_inline_admin/fixtures/users.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<django-objects version="1.0">
+    <object pk="100" model="auth.user">
+        <field type="CharField" name="username">super</field>
+        <field type="CharField" name="first_name">Super</field>
+        <field type="CharField" name="last_name">User</field>
+        <field type="CharField" name="email">super@example.com</field>
+        <field type="CharField" name="password">sha1$995a3$6011485ea3834267d719b4c801409b8b1ddd0158</field>
+        <field type="BooleanField" name="is_staff">True</field>
+        <field type="BooleanField" name="is_active">True</field>
+        <field type="BooleanField" name="is_superuser">True</field>
+        <field type="DateTimeField" name="last_login">2007-05-30 13:20:10</field>
+        <field type="DateTimeField" name="date_joined">2007-05-30 13:20:10</field>
+        <field to="auth.group" name="groups" rel="ManyToManyRel"></field>
+        <field to="auth.permission" name="user_permissions" rel="ManyToManyRel"></field>
+    </object>
+</django-objects>

tests/regressiontests/generic_inline_admin/models.py

@@ -0,0 +1,30 @@
+from django.db import models
+from django.contrib import admin
+from django.contrib.contenttypes import generic
+from django.contrib.contenttypes.models import ContentType
+
+class Episode(models.Model):
+    name = models.CharField(max_length=100)
+
+class Media(models.Model):
+    """
+    Media that can associated to any object.
+    """
+    content_type = models.ForeignKey(ContentType)
+    object_id = models.PositiveIntegerField()
+    content_object = generic.GenericForeignKey()
+    url = models.URLField(verify_exists=False)
+
+    def __unicode__(self):
+        return self.url
+
+class MediaInline(generic.GenericTabularInline):
+    model = Media
+    extra = 1
+    
+class EpisodeAdmin(admin.ModelAdmin):
+    inlines = [
+        MediaInline,
+    ]
+
+admin.site.register(Episode, EpisodeAdmin)

tests/regressiontests/generic_inline_admin/tests.py

@@ -0,0 +1,66 @@
+# coding: utf-8
+
+from django.test import TestCase
+from django.conf import settings
+
+# local test models
+from models import Episode, Media
+
+class GenericAdminViewTest(TestCase):
+    fixtures = ['users.xml', 'model-data.xml']
+
+    def setUp(self):
+        # set TEMPLATE_DEBUG to True to ensure {% include %} will raise
+        # exceptions since that is how inlines are rendered and #9498 will
+        # bubble up if it is an issue.
+        self.original_template_debug = settings.TEMPLATE_DEBUG
+        settings.TEMPLATE_DEBUG = True
+        self.client.login(username='super', password='secret')
+    
+    def tearDown(self):
+        self.client.logout()
+        settings.TEMPLATE_DEBUG = self.original_template_debug
+    
+    def testBasicAddGet(self):
+        """
+        A smoke test to ensure GET on the add_view works.
+        """
+        response = self.client.get('/generic_inline_admin/admin/generic_inline_admin/episode/add/')
+        self.failUnlessEqual(response.status_code, 200)
+    
+    def testBasicEditGet(self):
+        """
+        A smoke test to ensure GET on the change_view works.
+        """
+        response = self.client.get('/generic_inline_admin/admin/generic_inline_admin/episode/1/')
+        self.failUnlessEqual(response.status_code, 200)
+    
+    def testBasicAddPost(self):
+        """
+        A smoke test to ensure POST on add_view works.
+        """
+        post_data = {
+            "name": u"This Week in Django",
+            # inline data
+            "generic_inline_admin-media-content_type-object_id-TOTAL_FORMS": u"1",
+            "generic_inline_admin-media-content_type-object_id-INITIAL_FORMS": u"0",
+        }
+        response = self.client.post('/generic_inline_admin/admin/generic_inline_admin/episode/add/', post_data)
+        self.failUnlessEqual(response.status_code, 302) # redirect somewhere
+    
+    def testBasicEditPost(self):
+        """
+        A smoke test to ensure POST on edit_view works.
+        """
+        post_data = {
+            "name": u"This Week in Django",
+            # inline data
+            "generic_inline_admin-media-content_type-object_id-TOTAL_FORMS": u"2",
+            "generic_inline_admin-media-content_type-object_id-INITIAL_FORMS": u"1",
+            "generic_inline_admin-media-content_type-object_id-0-id": u"1",
+            "generic_inline_admin-media-content_type-object_id-0-url": u"http://example.com/podcast.mp3",
+            "generic_inline_admin-media-content_type-object_id-1-id": u"",
+            "generic_inline_admin-media-content_type-object_id-1-url": u"",
+        }
+        response = self.client.post('/generic_inline_admin/admin/generic_inline_admin/episode/1/', post_data)
+        self.failUnlessEqual(response.status_code, 302) # redirect somewhere

tests/regressiontests/generic_inline_admin/urls.py

@@ -0,0 +1,6 @@
+from django.conf.urls.defaults import *
+from django.contrib import admin
+
+urlpatterns = patterns('',
+    (r'^admin/(.*)', admin.site.root),
+)

tests/urls.py

@@ -23,6 +23,7 @@ urlpatterns = patterns('',
     
     # admin view tests
     (r'^test_admin/', include('regressiontests.admin_views.urls')),
+    (r'^generic_inline_admin/', include('regressiontests.generic_inline_admin.urls')),
 
     (r'^utils/', include('regressiontests.utils.urls')),