[ADD] Made a new route to serve alumni grouped by year (#83)

Co-authored-by: parthahere001 <parthahere001.com>

main/urls.py

@@ -19,6 +19,7 @@
 router.register(r'linit', views.LinitViewSet)
 router.register(r'timeline', views.TimelineViewSet)
 router.register(r'alumni', views.AlumniViewSet)
+router.register(r'alumni-by-year', views.AlumniByYearViewSet)
 router.register(r'techbytes', views.TechBytesViewSet)
 router.register(r'devposts', views.DevPostViewSet)
 router.register(r'configs', views.ConfigViewSet)

main/views.py

@@ -4,14 +4,14 @@
 from main.models import Config, Event, Profile, Alumni, About, Project, Contact, Activity, CarouselImage, Linit, Timeline, LinitImage, TechBytes, DevPost
 from main import serializers
 from main.forms import ProfileForm, ProfileChangeForm, MemberRegistrationForm
-from django.contrib.auth.forms import UserCreationForm
-from django.http import HttpResponseRedirect, HttpResponse
+from django.http import HttpResponseRedirect
 from django.contrib.auth.decorators import login_required
 from django.contrib import messages
-from django.urls import reverse, NoReverseMatch
+from django.urls import reverse
 from rest_framework.views import APIView
 from rest_framework.response import Response
 from rest_framework.permissions import AllowAny
+from collections import defaultdict
 
 
 def register(request):
@@ -108,7 +108,16 @@ class AlumniViewSet(viewsets.ModelViewSet):
 
 
 # ViewSets define the view behavior.
-
+class AlumniByYearViewSet(viewsets.ModelViewSet):
+    queryset = Alumni.objects.all().order_by('-passout_year', 'first_name')
+    serializer_class = serializers.AlumniSerializer
+    http_method_names = ['get']
+    def list(self,request):
+        data = defaultdict(list)
+        alumunus = self.queryset
+        for alumni in alumunus :
+            data[alumni.passout_year].append(self.serializer_class(alumni).data)
+        return Response(data)
 
 class UserViewSet(viewsets.ModelViewSet):
     queryset = User.objects.all()