We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Atom feed gets a 500 error
See http://sentry.kartoza.com/kartoza/projecta-live/group/5846/

Problem is cause by models/entry.py get_absolute_url() method which still uses old slug system to resolve path to an entry.


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `django_project/changes/models/entry.py`
Content:
```
1 # coding=utf-8
2 """Models for changelog entries."""
3 from django.core.urlresolvers import reverse
4 from django.utils.text import slugify
5 import os
6 import logging
7 from core.settings.contrib import STOP_WORDS
8 from django.conf.global_settings import MEDIA_ROOT
9 from django.db import models
10 from embed_video.fields import EmbedVideoField
11 from django.contrib.auth.models import User
12 
13 logger = logging.getLogger(__name__)
14 
15 
16 class ApprovedEntryManager(models.Manager):
17     """Custom entry manager that shows only approved records."""
18 
19     def get_queryset(self):
20         """Query set generator"""
21         return super(
22             ApprovedEntryManager, self).get_queryset().filter(
23                 approved=True)
24 
25 
26 class UnapprovedEntryManager(models.Manager):
27     """Custom entry manager that shows only unapproved records."""
28 
29     def get_queryset(self):
30         """Query set generator"""
31         return super(
32             UnapprovedEntryManager, self).get_queryset().filter(
33                 approved=False)
34 
35 
36 class Entry(models.Model):
37     """An entry is the basic unit of a changelog."""
38     title = models.CharField(
39         help_text='Feature title for this changelog entry.',
40         max_length=255,
41         null=False,
42         blank=False,
43         unique=False)  # Unique together rule applies in meta class
44 
45     description = models.TextField(
46         null=True,
47         blank=True,
48         help_text='Describe the new feature. Markdown is supported.')
49 
50     image_file = models.ImageField(
51         help_text=(
52             'A image that is related to this visual changelog entry. '
53             'Most browsers support dragging the image directly on to the '
54             '"Choose File" button above.'),
55         upload_to=os.path.join(MEDIA_ROOT, 'images/entries'),
56         blank=True)
57 
58     image_credits = models.CharField(
59         help_text='Who should be credited for this image?',
60         max_length=255,
61         null=True,
62         blank=True)
63 
64     video = EmbedVideoField(
65         verbose_name='Youtube video',
66         help_text='Paste your youtube video link',
67         null=True,
68         blank=True)
69 
70     funded_by = models.CharField(
71         help_text='Input the funder name.',
72         max_length=255,
73         null=True,
74         blank=True)
75 
76     funder_url = models.CharField(
77         help_text='Input the funder URL.',
78         max_length=255,
79         null=True,
80         blank=True)
81 
82     developed_by = models.CharField(
83         help_text='Input the developer name.',
84         max_length=255,
85         null=True,
86         blank=True)
87 
88     developer_url = models.CharField(
89         help_text='Input the developer URL.',
90         max_length=255,
91         null=True,
92         blank=True)
93 
94     approved = models.BooleanField(
95         help_text=(
96             'Whether this entry has been approved for use by the '
97             'project owner.'),
98         default=False
99     )
100     author = models.ForeignKey(User)
101     slug = models.SlugField()
102     # noinspection PyUnresolvedReferences
103     version = models.ForeignKey('Version')
104     # noinspection PyUnresolvedReferences
105     category = models.ForeignKey('Category')
106     objects = models.Manager()
107     approved_objects = ApprovedEntryManager()
108     unapproved_objects = UnapprovedEntryManager()
109 
110     # noinspection PyClassicStyleClass
111     class Meta:
112         """Meta options for the version class."""
113         unique_together = (
114             ('title', 'version', 'category'),
115             ('version', 'slug'),
116         )
117         app_label = 'changes'
118 
119     def save(self, *args, **kwargs):
120         if not self.pk:
121             words = self.title.split()
122             filtered_words = [t for t in words if t.lower() not in STOP_WORDS]
123             new_list = ' '.join(filtered_words)
124             self.slug = slugify(new_list)[:50]
125         super(Entry, self).save(*args, **kwargs)
126 
127     def __unicode__(self):
128         return u'%s' % self.title
129 
130     def get_absolute_url(self):
131         return reverse('entry-detail', kwargs={
132             'slug': self.slug,
133             'version_slug': self.version.slug,
134             'project_slug': self.version.project.slug
135         })
136 
137     def funder_info_html(self):
138         string = ""
139         if self.funded_by and self.funder_url is None:
140             string = ""
141             return string
142         elif self.funded_by and not self.funder_url:
143             string = "This feature was funded by %s " % self.funded_by
144             return string
145         elif self.funder_url and not self.funded_by:
146             string = "This feature was funded by [%s](%s)" % (
147                 self.funder_url, self.funder_url)
148             return string
149         elif self.funded_by and self.funder_url:
150             string = "This feature was funded by [%s](%s)" % (
151                 self.funded_by, self.funder_url)
152             return string
153         else:
154             return string
155 
156     def developer_info_html(self):
157         string = ""
158         if self.developed_by and self.developer_url is None:
159             string = ""
160             return string
161         elif self.developed_by and not self.developer_url:
162             string = "This feature was developed by %s " % self.developed_by
163             return string
164         elif self.developer_url and not self.developed_by:
165             string = "This feature was developed by [%s](%s)" % (
166                 self.developer_url, self.developer_url)
167             return string
168         elif self.developed_by and self.developer_url:
169             string = "This feature was developed by [%s](%s)" % (
170                 self.developed_by, self.developer_url)
171             return string
172         else:
173             return string
174
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/django_project/changes/models/entry.py b/django_project/changes/models/entry.py
--- a/django_project/changes/models/entry.py
+++ b/django_project/changes/models/entry.py
@@ -129,9 +129,7 @@
 
     def get_absolute_url(self):
         return reverse('entry-detail', kwargs={
-            'slug': self.slug,
-            'version_slug': self.version.slug,
-            'project_slug': self.version.project.slug
+            'pk': self.id
         })
 
     def funder_info_html(self):

{"golden_diff": "diff --git a/django_project/changes/models/entry.py b/django_project/changes/models/entry.py\n--- a/django_project/changes/models/entry.py\n+++ b/django_project/changes/models/entry.py\n@@ -129,9 +129,7 @@\n \n     def get_absolute_url(self):\n         return reverse('entry-detail', kwargs={\n-            'slug': self.slug,\n-            'version_slug': self.version.slug,\n-            'project_slug': self.version.project.slug\n+            'pk': self.id\n         })\n \n     def funder_info_html(self):\n", "issue": "Atom feed gets a 500 error\nSee http://sentry.kartoza.com/kartoza/projecta-live/group/5846/\n\nProblem is cause by models/entry.py get_absolute_url() method which still uses old slug system to resolve path to an entry.\n\n", "before_files": [{"content": "# coding=utf-8\n\"\"\"Models for changelog entries.\"\"\"\nfrom django.core.urlresolvers import reverse\nfrom django.utils.text import slugify\nimport os\nimport logging\nfrom core.settings.contrib import STOP_WORDS\nfrom django.conf.global_settings import MEDIA_ROOT\nfrom django.db import models\nfrom embed_video.fields import EmbedVideoField\nfrom django.contrib.auth.models import User\n\nlogger = logging.getLogger(__name__)\n\n\nclass ApprovedEntryManager(models.Manager):\n    \"\"\"Custom entry manager that shows only approved records.\"\"\"\n\n    def get_queryset(self):\n        \"\"\"Query set generator\"\"\"\n        return super(\n            ApprovedEntryManager, self).get_queryset().filter(\n                approved=True)\n\n\nclass UnapprovedEntryManager(models.Manager):\n    \"\"\"Custom entry manager that shows only unapproved records.\"\"\"\n\n    def get_queryset(self):\n        \"\"\"Query set generator\"\"\"\n        return super(\n            UnapprovedEntryManager, self).get_queryset().filter(\n                approved=False)\n\n\nclass Entry(models.Model):\n    \"\"\"An entry is the basic unit of a changelog.\"\"\"\n    title = models.CharField(\n        help_text='Feature title for this changelog entry.',\n        max_length=255,\n        null=False,\n        blank=False,\n        unique=False)  # Unique together rule applies in meta class\n\n    description = models.TextField(\n        null=True,\n        blank=True,\n        help_text='Describe the new feature. Markdown is supported.')\n\n    image_file = models.ImageField(\n        help_text=(\n            'A image that is related to this visual changelog entry. '\n            'Most browsers support dragging the image directly on to the '\n            '\"Choose File\" button above.'),\n        upload_to=os.path.join(MEDIA_ROOT, 'images/entries'),\n        blank=True)\n\n    image_credits = models.CharField(\n        help_text='Who should be credited for this image?',\n        max_length=255,\n        null=True,\n        blank=True)\n\n    video = EmbedVideoField(\n        verbose_name='Youtube video',\n        help_text='Paste your youtube video link',\n        null=True,\n        blank=True)\n\n    funded_by = models.CharField(\n        help_text='Input the funder name.',\n        max_length=255,\n        null=True,\n        blank=True)\n\n    funder_url = models.CharField(\n        help_text='Input the funder URL.',\n        max_length=255,\n        null=True,\n        blank=True)\n\n    developed_by = models.CharField(\n        help_text='Input the developer name.',\n        max_length=255,\n        null=True,\n        blank=True)\n\n    developer_url = models.CharField(\n        help_text='Input the developer URL.',\n        max_length=255,\n        null=True,\n        blank=True)\n\n    approved = models.BooleanField(\n        help_text=(\n            'Whether this entry has been approved for use by the '\n            'project owner.'),\n        default=False\n    )\n    author = models.ForeignKey(User)\n    slug = models.SlugField()\n    # noinspection PyUnresolvedReferences\n    version = models.ForeignKey('Version')\n    # noinspection PyUnresolvedReferences\n    category = models.ForeignKey('Category')\n    objects = models.Manager()\n    approved_objects = ApprovedEntryManager()\n    unapproved_objects = UnapprovedEntryManager()\n\n    # noinspection PyClassicStyleClass\n    class Meta:\n        \"\"\"Meta options for the version class.\"\"\"\n        unique_together = (\n            ('title', 'version', 'category'),\n            ('version', 'slug'),\n        )\n        app_label = 'changes'\n\n    def save(self, *args, **kwargs):\n        if not self.pk:\n            words = self.title.split()\n            filtered_words = [t for t in words if t.lower() not in STOP_WORDS]\n            new_list = ' '.join(filtered_words)\n            self.slug = slugify(new_list)[:50]\n        super(Entry, self).save(*args, **kwargs)\n\n    def __unicode__(self):\n        return u'%s' % self.title\n\n    def get_absolute_url(self):\n        return reverse('entry-detail', kwargs={\n            'slug': self.slug,\n            'version_slug': self.version.slug,\n            'project_slug': self.version.project.slug\n        })\n\n    def funder_info_html(self):\n        string = \"\"\n        if self.funded_by and self.funder_url is None:\n            string = \"\"\n            return string\n        elif self.funded_by and not self.funder_url:\n            string = \"This feature was funded by %s \" % self.funded_by\n            return string\n        elif self.funder_url and not self.funded_by:\n            string = \"This feature was funded by [%s](%s)\" % (\n                self.funder_url, self.funder_url)\n            return string\n        elif self.funded_by and self.funder_url:\n            string = \"This feature was funded by [%s](%s)\" % (\n                self.funded_by, self.funder_url)\n            return string\n        else:\n            return string\n\n    def developer_info_html(self):\n        string = \"\"\n        if self.developed_by and self.developer_url is None:\n            string = \"\"\n            return string\n        elif self.developed_by and not self.developer_url:\n            string = \"This feature was developed by %s \" % self.developed_by\n            return string\n        elif self.developer_url and not self.developed_by:\n            string = \"This feature was developed by [%s](%s)\" % (\n                self.developer_url, self.developer_url)\n            return string\n        elif self.developed_by and self.developer_url:\n            string = \"This feature was developed by [%s](%s)\" % (\n                self.developed_by, self.developer_url)\n            return string\n        else:\n            return string\n", "path": "django_project/changes/models/entry.py"}], "after_files": [{"content": "# coding=utf-8\n\"\"\"Models for changelog entries.\"\"\"\nfrom django.core.urlresolvers import reverse\nfrom django.utils.text import slugify\nimport os\nimport logging\nfrom core.settings.contrib import STOP_WORDS\nfrom django.conf.global_settings import MEDIA_ROOT\nfrom django.db import models\nfrom embed_video.fields import EmbedVideoField\nfrom django.contrib.auth.models import User\n\nlogger = logging.getLogger(__name__)\n\n\nclass ApprovedEntryManager(models.Manager):\n    \"\"\"Custom entry manager that shows only approved records.\"\"\"\n\n    def get_queryset(self):\n        \"\"\"Query set generator\"\"\"\n        return super(\n            ApprovedEntryManager, self).get_queryset().filter(\n                approved=True)\n\n\nclass UnapprovedEntryManager(models.Manager):\n    \"\"\"Custom entry manager that shows only unapproved records.\"\"\"\n\n    def get_queryset(self):\n        \"\"\"Query set generator\"\"\"\n        return super(\n            UnapprovedEntryManager, self).get_queryset().filter(\n                approved=False)\n\n\nclass Entry(models.Model):\n    \"\"\"An entry is the basic unit of a changelog.\"\"\"\n    title = models.CharField(\n        help_text='Feature title for this changelog entry.',\n        max_length=255,\n        null=False,\n        blank=False,\n        unique=False)  # Unique together rule applies in meta class\n\n    description = models.TextField(\n        null=True,\n        blank=True,\n        help_text='Describe the new feature. Markdown is supported.')\n\n    image_file = models.ImageField(\n        help_text=(\n            'A image that is related to this visual changelog entry. '\n            'Most browsers support dragging the image directly on to the '\n            '\"Choose File\" button above.'),\n        upload_to=os.path.join(MEDIA_ROOT, 'images/entries'),\n        blank=True)\n\n    image_credits = models.CharField(\n        help_text='Who should be credited for this image?',\n        max_length=255,\n        null=True,\n        blank=True)\n\n    video = EmbedVideoField(\n        verbose_name='Youtube video',\n        help_text='Paste your youtube video link',\n        null=True,\n        blank=True)\n\n    funded_by = models.CharField(\n        help_text='Input the funder name.',\n        max_length=255,\n        null=True,\n        blank=True)\n\n    funder_url = models.CharField(\n        help_text='Input the funder URL.',\n        max_length=255,\n        null=True,\n        blank=True)\n\n    developed_by = models.CharField(\n        help_text='Input the developer name.',\n        max_length=255,\n        null=True,\n        blank=True)\n\n    developer_url = models.CharField(\n        help_text='Input the developer URL.',\n        max_length=255,\n        null=True,\n        blank=True)\n\n    approved = models.BooleanField(\n        help_text=(\n            'Whether this entry has been approved for use by the '\n            'project owner.'),\n        default=False\n    )\n    author = models.ForeignKey(User)\n    slug = models.SlugField()\n    # noinspection PyUnresolvedReferences\n    version = models.ForeignKey('Version')\n    # noinspection PyUnresolvedReferences\n    category = models.ForeignKey('Category')\n    objects = models.Manager()\n    approved_objects = ApprovedEntryManager()\n    unapproved_objects = UnapprovedEntryManager()\n\n    # noinspection PyClassicStyleClass\n    class Meta:\n        \"\"\"Meta options for the version class.\"\"\"\n        unique_together = (\n            ('title', 'version', 'category'),\n            ('version', 'slug'),\n        )\n        app_label = 'changes'\n\n    def save(self, *args, **kwargs):\n        if not self.pk:\n            words = self.title.split()\n            filtered_words = [t for t in words if t.lower() not in STOP_WORDS]\n            new_list = ' '.join(filtered_words)\n            self.slug = slugify(new_list)[:50]\n        super(Entry, self).save(*args, **kwargs)\n\n    def __unicode__(self):\n        return u'%s' % self.title\n\n    def get_absolute_url(self):\n        return reverse('entry-detail', kwargs={\n            'pk': self.id\n        })\n\n    def funder_info_html(self):\n        string = \"\"\n        if self.funded_by and self.funder_url is None:\n            string = \"\"\n            return string\n        elif self.funded_by and not self.funder_url:\n            string = \"This feature was funded by %s \" % self.funded_by\n            return string\n        elif self.funder_url and not self.funded_by:\n            string = \"This feature was funded by [%s](%s)\" % (\n                self.funder_url, self.funder_url)\n            return string\n        elif self.funded_by and self.funder_url:\n            string = \"This feature was funded by [%s](%s)\" % (\n                self.funded_by, self.funder_url)\n            return string\n        else:\n            return string\n\n    def developer_info_html(self):\n        string = \"\"\n        if self.developed_by and self.developer_url is None:\n            string = \"\"\n            return string\n        elif self.developed_by and not self.developer_url:\n            string = \"This feature was developed by %s \" % self.developed_by\n            return string\n        elif self.developer_url and not self.developed_by:\n            string = \"This feature was developed by [%s](%s)\" % (\n                self.developer_url, self.developer_url)\n            return string\n        elif self.developed_by and self.developer_url:\n            string = \"This feature was developed by [%s](%s)\" % (\n                self.developed_by, self.developer_url)\n            return string\n        else:\n            return string\n", "path": "django_project/changes/models/entry.py"}]}