prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Adding 'Offline Informasjonstekster' causes error
  Not really sure what this does but it casts an error saying:
  
  Exception Type:     IntegrityError
  Exception Value:    column key is not unique
  
  
  </issue>
  <code>
  [start of apps/offline/admin.py]
  1 from apps.offline.models import ProxyChunk, Issue
  2 from chunks.models import Chunk
  3 from django.contrib import admin
  4 from django.db.models import Q
  5 
  6 
  7 class ProxyChunkAdmin(admin.ModelAdmin):
  8 
  9     readonly_fields = ['key']
  10 
  11     def queryset(self, request):
  12         offline = Chunk.objects.filter(Q(key='offline_ingress') | Q(key='offline_brodtekst'))
  13         return offline
  14 
  15 admin.site.register(ProxyChunk, ProxyChunkAdmin)
  16 admin.site.register(Issue)
  17
  [end of apps/offline/admin.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/apps/offline/admin.py b/apps/offline/admin.py
  --- a/apps/offline/admin.py
  +++ b/apps/offline/admin.py
  @@ -8,6 +8,9 @@
   
       readonly_fields = ['key']
   
  +    def has_add_permission(self, request):
  +        return False
  +
       def queryset(self, request):
           offline = Chunk.objects.filter(Q(key='offline_ingress') | Q(key='offline_brodtekst'))
           return offline
  
verification_info: {"golden_diff": "diff --git a/apps/offline/admin.py b/apps/offline/admin.py\n--- a/apps/offline/admin.py\n+++ b/apps/offline/admin.py\n@@ -8,6 +8,9 @@\n \n     readonly_fields = ['key']\n \n+    def has_add_permission(self, request):\n+        return False\n+\n     def queryset(self, request):\n         offline = Chunk.objects.filter(Q(key='offline_ingress') | Q(key='offline_brodtekst'))\n         return offline\n", "issue": "Adding 'Offline Informasjonstekster' causes error\nNot really sure what this does but it casts an error saying:\n\nException Type:     IntegrityError\nException Value:    column key is not unique\n\n", "before_files": [{"content": "from apps.offline.models import ProxyChunk, Issue\nfrom chunks.models import Chunk\nfrom django.contrib import admin\nfrom django.db.models import Q\n\n\nclass ProxyChunkAdmin(admin.ModelAdmin):\n\n    readonly_fields = ['key']\n\n    def queryset(self, request):\n        offline = Chunk.objects.filter(Q(key='offline_ingress') | Q(key='offline_brodtekst'))\n        return offline\n\nadmin.site.register(ProxyChunk, ProxyChunkAdmin)\nadmin.site.register(Issue)\n", "path": "apps/offline/admin.py"}]}