prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  500 error when rename team slug
  Error raised if same slug already exists
  
  Traceback:
  
  ```
  File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/core/handlers/base.py", line 112, in get_response
       response = wrapped_callback(request, *callback_args, **callback_kwargs)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/views/generic/base.py", line 69, in view
       return self.dispatch(request, *args, **kwargs)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/utils/decorators.py", line 29, in _wrapper
       return bound_func(*args, **kwargs)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/utils/decorators.py", line 99, in _wrapped_view
       response = view_func(request, *args, **kwargs)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/utils/decorators.py", line 25, in bound_func
       return func(self, *args2, **kwargs2)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/sentry/web/frontend/base.py", line 144, in dispatch
       return self.handle(request, *args, **kwargs)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/sentry/web/frontend/team_settings.py", line 37, in handle
       team = form.save()
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/forms/models.py", line 446, in save
       construct=False)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/forms/models.py", line 99, in save_instance
       instance.save()
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/sentry/models/team.py", line 141, in save
       super(Team, self).save(*args, **kwargs)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/models/base.py", line 545, in save
       force_update=force_update, update_fields=update_fields)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/models/base.py", line 573, in save_base
       updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/models/base.py", line 635, in _save_table
       forced_update)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/models/base.py", line 679, in _do_update
       return filtered._update(values) > 0
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/models/query.py", line 510, in _update
       return query.get_compiler(self.db).execute_sql(None)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 980, in execute_sql
       cursor = super(SQLUpdateCompiler, self).execute_sql(result_type)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 786, in execute_sql
       cursor.execute(sql, params)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/backends/util.py", line 53, in execute
       return self.cursor.execute(sql, params)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/utils.py", line 99, in __exit__
       six.reraise(dj_exc_type, dj_exc_value, traceback)
     File "/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/backends/util.py", line 53, in execute
       return self.cursor.execute(sql, params)
   IntegrityError: duplicate key value violates unique constraint "sentry_team_organization_id_1e0ece47434a2ed_uniq"
   DETAIL:  Key (organization_id, slug)=(1, adwile) already exists.
  ```
  
  
  </issue>
  <code>
  [start of src/sentry/web/frontend/team_settings.py]
  1 from __future__ import absolute_import
  2 
  3 from django import forms
  4 from django.contrib import messages
  5 from django.core.urlresolvers import reverse
  6 from django.http import HttpResponseRedirect
  7 from django.utils.translation import ugettext_lazy as _
  8 
  9 from sentry.models import AuditLogEntry, AuditLogEntryEvent, Team
  10 from sentry.web.frontend.base import TeamView
  11 
  12 
  13 class EditTeamForm(forms.ModelForm):
  14     class Meta:
  15         fields = ('name', 'slug',)
  16         model = Team
  17 
  18 
  19 class TeamSettingsView(TeamView):
  20     required_scope = 'team:write'
  21 
  22     def get_form(self, request, team):
  23         return EditTeamForm(request.POST or None, instance=team)
  24 
  25     def handle(self, request, organization, team):
  26         form = self.get_form(request, team)
  27         if form.is_valid():
  28             team = form.save()
  29 
  30             AuditLogEntry.objects.create(
  31                 organization=organization,
  32                 actor=request.user,
  33                 ip_address=request.META['REMOTE_ADDR'],
  34                 target_object=team.id,
  35                 event=AuditLogEntryEvent.TEAM_EDIT,
  36                 data=team.get_audit_log_data(),
  37             )
  38 
  39             messages.add_message(request, messages.SUCCESS,
  40                 _('Changes to your team were saved.'))
  41 
  42             return HttpResponseRedirect(reverse('sentry-manage-team', args=[organization.slug, team.slug]))
  43 
  44         if request.user.is_active_superuser():
  45             can_remove_team = True
  46         else:
  47             can_remove_team = request.access.has_team_scope(team, 'team:delete')
  48 
  49         context = {
  50             'form': form,
  51             'can_remove_team': can_remove_team,
  52         }
  53 
  54         return self.respond('sentry/teams/manage.html', context)
  55
  [end of src/sentry/web/frontend/team_settings.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/src/sentry/web/frontend/team_settings.py b/src/sentry/web/frontend/team_settings.py
  --- a/src/sentry/web/frontend/team_settings.py
  +++ b/src/sentry/web/frontend/team_settings.py
  @@ -3,6 +3,7 @@
   from django import forms
   from django.contrib import messages
   from django.core.urlresolvers import reverse
  +from django.db import IntegrityError
   from django.http import HttpResponseRedirect
   from django.utils.translation import ugettext_lazy as _
   
  @@ -23,21 +24,27 @@
           return EditTeamForm(request.POST or None, instance=team)
   
       def handle(self, request, organization, team):
  +        old_slug = team.slug
           form = self.get_form(request, team)
           if form.is_valid():
  -            team = form.save()
  -
  -            AuditLogEntry.objects.create(
  -                organization=organization,
  -                actor=request.user,
  -                ip_address=request.META['REMOTE_ADDR'],
  -                target_object=team.id,
  -                event=AuditLogEntryEvent.TEAM_EDIT,
  -                data=team.get_audit_log_data(),
  -            )
  -
  -            messages.add_message(request, messages.SUCCESS,
  -                _('Changes to your team were saved.'))
  +            try:
  +                team = form.save()
  +            except IntegrityError:
  +                team.slug = old_slug
  +                messages.add_message(request, messages.ERROR,
  +                    _('Changes to your team failed. Slug already exists.'))
  +            else:
  +                AuditLogEntry.objects.create(
  +                    organization=organization,
  +                    actor=request.user,
  +                    ip_address=request.META['REMOTE_ADDR'],
  +                    target_object=team.id,
  +                    event=AuditLogEntryEvent.TEAM_EDIT,
  +                    data=team.get_audit_log_data(),
  +                )
  +
  +                messages.add_message(request, messages.SUCCESS,
  +                    _('Changes to your team were saved.'))
   
               return HttpResponseRedirect(reverse('sentry-manage-team', args=[organization.slug, team.slug]))
  
verification_info: {"golden_diff": "diff --git a/src/sentry/web/frontend/team_settings.py b/src/sentry/web/frontend/team_settings.py\n--- a/src/sentry/web/frontend/team_settings.py\n+++ b/src/sentry/web/frontend/team_settings.py\n@@ -3,6 +3,7 @@\n from django import forms\n from django.contrib import messages\n from django.core.urlresolvers import reverse\n+from django.db import IntegrityError\n from django.http import HttpResponseRedirect\n from django.utils.translation import ugettext_lazy as _\n \n@@ -23,21 +24,27 @@\n         return EditTeamForm(request.POST or None, instance=team)\n \n     def handle(self, request, organization, team):\n+        old_slug = team.slug\n         form = self.get_form(request, team)\n         if form.is_valid():\n-            team = form.save()\n-\n-            AuditLogEntry.objects.create(\n-                organization=organization,\n-                actor=request.user,\n-                ip_address=request.META['REMOTE_ADDR'],\n-                target_object=team.id,\n-                event=AuditLogEntryEvent.TEAM_EDIT,\n-                data=team.get_audit_log_data(),\n-            )\n-\n-            messages.add_message(request, messages.SUCCESS,\n-                _('Changes to your team were saved.'))\n+            try:\n+                team = form.save()\n+            except IntegrityError:\n+                team.slug = old_slug\n+                messages.add_message(request, messages.ERROR,\n+                    _('Changes to your team failed. Slug already exists.'))\n+            else:\n+                AuditLogEntry.objects.create(\n+                    organization=organization,\n+                    actor=request.user,\n+                    ip_address=request.META['REMOTE_ADDR'],\n+                    target_object=team.id,\n+                    event=AuditLogEntryEvent.TEAM_EDIT,\n+                    data=team.get_audit_log_data(),\n+                )\n+\n+                messages.add_message(request, messages.SUCCESS,\n+                    _('Changes to your team were saved.'))\n \n             return HttpResponseRedirect(reverse('sentry-manage-team', args=[organization.slug, team.slug]))\n", "issue": "500 error when rename team slug\nError raised if same slug already exists\n\nTraceback:\n\n```\nFile \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/core/handlers/base.py\", line 112, in get_response\n     response = wrapped_callback(request, *callback_args, **callback_kwargs)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/views/generic/base.py\", line 69, in view\n     return self.dispatch(request, *args, **kwargs)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/utils/decorators.py\", line 29, in _wrapper\n     return bound_func(*args, **kwargs)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/utils/decorators.py\", line 99, in _wrapped_view\n     response = view_func(request, *args, **kwargs)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/utils/decorators.py\", line 25, in bound_func\n     return func(self, *args2, **kwargs2)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/sentry/web/frontend/base.py\", line 144, in dispatch\n     return self.handle(request, *args, **kwargs)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/sentry/web/frontend/team_settings.py\", line 37, in handle\n     team = form.save()\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/forms/models.py\", line 446, in save\n     construct=False)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/forms/models.py\", line 99, in save_instance\n     instance.save()\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/sentry/models/team.py\", line 141, in save\n     super(Team, self).save(*args, **kwargs)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/models/base.py\", line 545, in save\n     force_update=force_update, update_fields=update_fields)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/models/base.py\", line 573, in save_base\n     updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/models/base.py\", line 635, in _save_table\n     forced_update)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/models/base.py\", line 679, in _do_update\n     return filtered._update(values) > 0\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/models/query.py\", line 510, in _update\n     return query.get_compiler(self.db).execute_sql(None)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/models/sql/compiler.py\", line 980, in execute_sql\n     cursor = super(SQLUpdateCompiler, self).execute_sql(result_type)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/models/sql/compiler.py\", line 786, in execute_sql\n     cursor.execute(sql, params)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/backends/util.py\", line 53, in execute\n     return self.cursor.execute(sql, params)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/utils.py\", line 99, in __exit__\n     six.reraise(dj_exc_type, dj_exc_value, traceback)\n   File \"/home/www/pyenv/versions/sentry/lib/python2.7/site-packages/django/db/backends/util.py\", line 53, in execute\n     return self.cursor.execute(sql, params)\n IntegrityError: duplicate key value violates unique constraint \"sentry_team_organization_id_1e0ece47434a2ed_uniq\"\n DETAIL:  Key (organization_id, slug)=(1, adwile) already exists.\n```\n\n", "before_files": [{"content": "from __future__ import absolute_import\n\nfrom django import forms\nfrom django.contrib import messages\nfrom django.core.urlresolvers import reverse\nfrom django.http import HttpResponseRedirect\nfrom django.utils.translation import ugettext_lazy as _\n\nfrom sentry.models import AuditLogEntry, AuditLogEntryEvent, Team\nfrom sentry.web.frontend.base import TeamView\n\n\nclass EditTeamForm(forms.ModelForm):\n    class Meta:\n        fields = ('name', 'slug',)\n        model = Team\n\n\nclass TeamSettingsView(TeamView):\n    required_scope = 'team:write'\n\n    def get_form(self, request, team):\n        return EditTeamForm(request.POST or None, instance=team)\n\n    def handle(self, request, organization, team):\n        form = self.get_form(request, team)\n        if form.is_valid():\n            team = form.save()\n\n            AuditLogEntry.objects.create(\n                organization=organization,\n                actor=request.user,\n                ip_address=request.META['REMOTE_ADDR'],\n                target_object=team.id,\n                event=AuditLogEntryEvent.TEAM_EDIT,\n                data=team.get_audit_log_data(),\n            )\n\n            messages.add_message(request, messages.SUCCESS,\n                _('Changes to your team were saved.'))\n\n            return HttpResponseRedirect(reverse('sentry-manage-team', args=[organization.slug, team.slug]))\n\n        if request.user.is_active_superuser():\n            can_remove_team = True\n        else:\n            can_remove_team = request.access.has_team_scope(team, 'team:delete')\n\n        context = {\n            'form': form,\n            'can_remove_team': can_remove_team,\n        }\n\n        return self.respond('sentry/teams/manage.html', context)\n", "path": "src/sentry/web/frontend/team_settings.py"}]}