hi everyone

I have a problem with allow method GET in my project, I find out problem 
but nothing working.

this is my urls.py file

from django.conf.urls import url
from apicolonybit.dashboard_clbt import views


urlpatterns = [
    # dashboard
    url(r'^dashboards/$', views.DashboardViewList.as_view()),
    url(r'^dashboards', views.DashboardViewCreate.as_view()),
    url(r'^dashboards/(?P<pk>[^/]+)', views.DashboardViewDetail.as_view(), 
name='dashboard-detail'),
    url(r'^dashboards/(?P<pk>\d+)/update', views.DashboardViewUpdate.as_view()),

]


this is my views.py

class DashboardViewDetail(DetailView): # I try with APIView, and nothing working
    queryset = Dashboard.objects.all()
    serializer_class = DashboardSerializer
    # permission_classes = (permissions.AllowAny,)
    # model = Dashboard
    # get_object and get recover detail from user
    def get(self, request, pk, format=None):
        dashboard_id = self.get_object(pk)
        serializer = DashboardSerializer(dashboard_id, many=True)
        return JsonResponse(serializer.data, safe=False)

    def get_object(self, pk):
        try:
            user = User.objects.get(pk=pk)
            return Dashboard.objects.filter(user_id=user.id)
        except Dashboard.DoesNotExist:
            raise Http404


my file serializers.py

from django.http import JsonResponse
from rest_framework import serializers
from apicolonybit.dashboard_clbt.models import Dashboard


dashboard_fields = ('id', 'component', 'column', 'position', 'user')


class DashboardSerializer(serializers.ModelSerializer):
    class Meta:
        model = Dashboard
        fields = dashboard_fields



I try everything, but nothing working, the messages in my postman is 
{"detail":"Method \"GET\" not allowed."}


the url is
http://127.0.0.1:8000/api/v1/dashboards/2 

I try with 

http://127.0.0.1:8000/api/v1/dashboards/2/

and not working too

and sametime not working method put and patch, just working method POST

in my postman headers sed
Allow →POST, OPTIONS
Content-Length →40
Content-Type →application/json
Date →Tue, 05 Dec 2017 18:59:33 GMT
Server →WSGIServer/0.2 CPython/3.5.3
Vary →Accept
X-Frame-Options →SAMEORIGIN

and don't know why not allow GET, PUT AND PATCH.

I see documentation, and I follow the instructions and not working

please help me.

































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