old_contents: from django.shortcuts import render
  from django.http import HttpResponse, HttpResponseRedirect
  from django.template import RequestContext
  from django.forms.models import modelformset_factory
  from django.contrib import messages
  import django_filters
  from rest_framework import filters
  from rest_framework import generics
  from rest_framework import viewsets
  from rest_framework.pagination import PageNumberPagination
  from rest_framework.views import APIView
  from rest_framework.decorators import list_route, detail_route
  from rest_framework.response import Response
  from django.shortcuts import get_object_or_404
  import unicodecsv as csv
  from datetime import date
  from django.db.models import Count
  from django.shortcuts import render
  
  from models import Release, Track 
  from serializers import ReleaseSerializer, TrackSerializer, CommentSerializer
  
  # Create your views here.
  class ArtistViewSet(viewsets.ViewSet):
      filter_backends = (filters.SearchFilter,)
      search_fields = ('artist',)
  
      def list(self, request):
          searchParam = self.request.query_params.get('term')
          if searchParam is None:
              artists = [release.artist for release in Release.objects.distinct('artist').order_by('artist')]
          else:
              artists = [release.artist for release in
                        Release.objects.distinct('artist').filter(artist__icontains=searchParam).order_by('artist')]
  
          return Response(artists)
  
  
  class ReleaseViewSet(viewsets.ModelViewSet):
      queryset = Release.objects.all()
      serializer_class = ReleaseSerializer
      filter_backends = (filters.OrderingFilter,
                         filters.SearchFilter,)
      search_fields = ('artist', 'title', 'tracks__title')
      ordering_fields = ('arrivaldate', 'artist', 'title')
  
      @detail_route()
      def tracks(self, request, pk=None):
          release = self.get_object()
          serializer = TrackSerializer(release.tracks.all().order_by('tracknum'), context={'request': request}, many=True)
          return Response(serializer.data)
  
      @detail_route()
      def comments(self, request, pk=None):
          release = self.get_object()
          serializer = CommentSerializer(release.comments.all().order_by('pk'), context={'request': request}, many=True)
          return Response(serializer.data)
  
  class TrackFilter(django_filters.FilterSet):
      artist = django_filters.CharFilter(name="album__artist", lookup_type='icontains')
      track = django_filters.CharFilter(name="tracktitle", lookup_type='icontains')
  
      class Meta:
          model = Track
          fields = ['track', 'artist']
  
  
  class TrackViewSet(viewsets.ModelViewSet):
      queryset = Track.objects.all()
      serializer_class = TrackSerializer
      filter_backends = (filters.DjangoFilterBackend,)
      filter_class = TrackFilter
  
new_contents: from django.shortcuts import render
  from django.http import HttpResponse, HttpResponseRedirect
  from django.template import RequestContext
  from django.forms.models import modelformset_factory
  from django.contrib import messages
  import django_filters
  from rest_framework import filters
  from rest_framework import generics
  from rest_framework import viewsets
  from rest_framework.pagination import PageNumberPagination
  from rest_framework.views import APIView
  from rest_framework.decorators import list_route, detail_route
  from rest_framework.response import Response
  from django.shortcuts import get_object_or_404
  import unicodecsv as csv
  from datetime import date
  from django.db.models import Count
  from django.shortcuts import render
  
  from models import Release, Track 
  from serializers import ReleaseSerializer, TrackSerializer, CommentSerializer
  
  # Create your views here.
  class ArtistViewSet(viewsets.ViewSet):
      filter_backends = (filters.SearchFilter,)
      search_fields = ('artist',)
  
      def list(self, request):
          searchParam = self.request.query_params.get('term')
          if searchParam is None:
              artists = [release.artist for release in Release.objects.distinct('artist').order_by('artist')]
          else:
              artists = [release.artist for release in
                        Release.objects.distinct('artist').filter(artist__icontains=searchParam).order_by('artist')]
  
          return Response(artists)
  
  class ReleaseFilter(filters.FilterSet):
    min_arrival = django_filters.DateFilter(name="arrivaldate", lookup_type="gte")
    class Meta:
      model = Release
      fields = ['arrivaldate',]
  
  
  
  class ReleaseViewSet(viewsets.ModelViewSet):
      queryset = Release.objects.all()
      serializer_class = ReleaseSerializer
      filter_backends = (filters.OrderingFilter,
                         filters.SearchFilter,
                         filters.DjangoFilterBackend)
      search_fields = ('artist', 'title', 'tracks__title')
      ordering_fields = ('arrivaldate', 'artist', 'title')
      filter_fields = ('arrivaldate',)
      filter_class = ReleaseFilter
  
      @detail_route()
      def tracks(self, request, pk=None):
          release = self.get_object()
          serializer = TrackSerializer(release.tracks.all().order_by('tracknum'), context={'request': request}, many=True)
          return Response(serializer.data)
  
      @detail_route()
      def comments(self, request, pk=None):
          release = self.get_object()
          serializer = CommentSerializer(release.comments.all().order_by('pk'), context={'request': request}, many=True)
          return Response(serializer.data)
  
  class TrackFilter(django_filters.FilterSet):
      artist = django_filters.CharFilter(name="album__artist", lookup_type='icontains')
      track = django_filters.CharFilter(name="tracktitle", lookup_type='icontains')
  
      class Meta:
          model = Track
          fields = ['track', 'artist']
  
  
  class TrackViewSet(viewsets.ModelViewSet):
      queryset = Track.objects.all()
      serializer_class = TrackSerializer
      filter_backends = (filters.DjangoFilterBackend,)
      filter_class = TrackFilter
  
subject: Add earliest arrival date filter to release.