feat: api search books, members, librarians, book loans

api/views.py

+from rest_framework.filters import SearchFilter
 from rest_framework.viewsets import ModelViewSet
 from rest_framework.permissions import IsAuthenticated
 from django_filters.rest_framework import DjangoFilterBackend
@@ -25,30 +26,37 @@ class UserViewSet(ModelViewSet):
 class BookViewSet(ModelViewSet):
     queryset = Book.objects.all().order_by("created_at")
     serializer_class = BookSerializer
-    filter_backends = [DjangoFilterBackend]
+    filter_backends = [DjangoFilterBackend, SearchFilter]
     filterset_fields = ["title", "description"]
+    search_fields = filterset_fields
 
 
 class MemberViewSet(ModelViewSet):
     queryset = Members.objects.all().order_by("created_at")
     serializer_class = MemberSerializer
-    filter_backends = [DjangoFilterBackend]
+    filter_backends = [DjangoFilterBackend, SearchFilter]
     filterset_fields = ["name", "email"]
+    search_fields = filterset_fields
 
 
 class LibrarianViewSet(ModelViewSet):
     queryset = Librarians.objects.all().order_by("created_at")
     serializer_class = LibrarianSerializer
-    filter_backends = [DjangoFilterBackend]
+    filter_backends = [DjangoFilterBackend, SearchFilter]
     filterset_fields = ["name", "email"]
+    search_fields = filterset_fields
 
 
 class BookLoanViewSet(ModelViewSet):
     queryset = BookLoans.objects.all().order_by("created_at")
     serializer_class = BookLoanSerializer
-    filter_backends = [DjangoFilterBackend]
+    filter_backends = [DjangoFilterBackend, SearchFilter]
     filterset_fields = [
+        "book__title",
+        "member__name",
+        "librarians__name",
         "loan_date",
         "due_date",
         "return_date",
     ]
+    search_fields = filterset_fields