django restframwork Put and DELETE doesn't work - django

Question

Get and post work pretty well for me .
but put and delete i use "U_repo_name" to look in table
i got the error message :
Page not found (404)
Request Method: PUT
Request URL: http://localhost:8000/gitapi/repo/authoo/
Using the URLconf defined in gitit.urls, Django tried these URL patterns, in this order:
admin/
gitapi/ [name='gitapi']
gitapi/ repo/
gitapi/ repo/str:U_repo_name
this is my model :
class UserRepos(models.Model):
U_repo_name =models.CharField( max_length=50)
this is my url :
urlpatterns = [
path('repo/',view=userreposapi),
path('repo/<str:U_repo_name>',view=userreposapi),
]
project urls :
urlpatterns = [
path('admin/', admin.site.urls),
path('gitapi/',include('gitapi.urls')),
]
this is my serializer :
class UserReposSerializer(serializers.ModelSerializer):
class Meta:
model = UserRepos
fields ='__all__'
and this is my views :
#csrf_exempt
def userreposapi(request,id=0):
if request.method=='GET':
userrepos = UserRepos.objects.all()
userreposserializer = UserReposSerializer(userrepos , many=True)
return JsonResponse(userreposserializer.data , safe=False)
elif request.method=='POST':
userrepos_data=JSONParser().parse(request)
userreposerializer = UserReposSerializer(data=userrepos_data)
if userreposerializer.is_valid():
userreposerializer.save()
return JsonResponse("added successfully!!",safe=False)
return JsonResponse("failed to add",safe=False)
elif request.method=='Put':
userrepos_data=JSONParser().parse(request)
userrepos = UserRepos.objects.get(U_repo_name=userrepos_data['U_repo_name'])
userreposserializer=UserReposSerializer(userrepos,data=userrepos_data)
if userreposserializer.is_valid():
userreposserializer.save()
return JsonResponse("updated successfully", safe=False)
return JsonResponse("failed to update",safe=False)
elif request.method=='DELETE':
userrepos = UserRepos.objects.all()
userrepos.delete()
return JsonResponse("deleted",safe=False)

Answer 1

Hi! I see a few issues with your code that might be causing this problem.
request.method is always full capitalized, so you should use the string 'PUT' instead of 'Put' on this line:
elif request.method=='Put':
You are adding a trailing slash to your route when trying to access it (/gitapi/repo/authoo/), but the pattern set in urlpatterns doesn't have this trailing slash:
path('repo/<str:U_repo_name>',view=userreposapi),
You can use re_path() instead of path() to set a regex URL pattern that works whether you add a trailing slash or not:
re_path(r'repo/(?P<U_repo_name>\w+)/?', view=userreposapi),
(?P<U_repo_name>\w+) creates a named group called U_repo_name that matches any word character ([a-zA-Z0-9_]) from one to more times. /? matches a single optional /.
Your route 'repo/<str:U_repo_name>' captures a string in the variable U_repo_name. This variable is provided to the view userreposapi() as a keyword argument, but the view currently only accepts the id kwarg. You should either add the U_repo_name kwarg as an optional argument or make the view accept other keyword arguments with **kwargs:
# Both are valid:
def userreposapi(request, id=0, U_repo_name=None):
...
def userreposapi(request, id=0, **kwargs):
...
Fixing these 3 issues should make the route work.

Answer 2

I think the trailing slash in the url is the problem. I should be not there.
http://localhost:8000/gitapi/repo/authoo # here I removed the trailing slash.