feat: loan api

api/loans/serializers.py

+from rest_framework import serializers
+
+from loans.models import BookLoan
+
+
+class BookLoanSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = BookLoan
+        fields = "__all__"

api/loans/views.py

+from django.utils import timezone
+from rest_framework import viewsets
+from rest_framework.response import Response
+from rest_framework.filters import SearchFilter
+from django_filters.rest_framework import DjangoFilterBackend
+
+from .serializers import BookLoan, BookLoanSerializer
+
+
+class BookLoanViewSet(viewsets.ModelViewSet):
+    queryset = BookLoan.objects.all().order_by("loan_date")
+    serializer_class = BookLoanSerializer
+    filter_backends = [DjangoFilterBackend, SearchFilter]
+    filterset_fields = ["loan_date", "due_date", "return_date", "member__id"]
+    search_fields = ["book__title", "member__name"]
+
+    def update(self, request, pk):
+        instance = self.get_object()
+        serializer = self.get_serializer(instance, data=request.data, partial=True)
+        serializer.is_valid(raise_exception=True)
+        serializer.save()
+        return Response(serializer.data)
+
+
+class OverduedBookLoanViewSet(BookLoanViewSet):
+    now = timezone.now()
+    queryset = (
+        BookLoan.objects.all()
+        .filter(due_date__lte=now, return_date=None)
+        .order_by("loan_date")
+    )
+
+
+class UpComingBookLoanViewSet(BookLoanViewSet):
+    now = timezone.now()
+    due_date_treshold = now + timezone.timedelta(days=3)
+    queryset = (
+        BookLoan.objects.all()
+        .filter(due_date__lte=due_date_treshold, return_date=None)
+        .filter(due_date__gte=now)
+        .order_by("loan_date")
+    )

api/urls.py

@@ -10,12 +10,25 @@ from .auth.views import (
     MemberLogoutView,
 )
 from .book.views import BookViewSet, CategoryViewSet
+from .loans.views import (
+    BookLoanViewSet,
+    OverduedBookLoanViewSet,
+    UpComingBookLoanViewSet,
+)
+
 
 router = routers.DefaultRouter()
 router.register(r"librarians", LibrarianViewSet, basename="librarians")
 router.register(r"members", MemberViewSet, basename="members")
 router.register(r"books", BookViewSet, basename="books")
 router.register(r"categories", CategoryViewSet, basename="categories")
+router.register(r"book-loans", BookLoanViewSet, basename="book_loans")
+router.register(
+    r"overdued-loans", OverduedBookLoanViewSet, basename="book_loans_overdued"
+)
+router.register(
+    r"upcoming-loans", UpComingBookLoanViewSet, basename="book_loans_upcoming"
+)
 
 urlpatterns = [
     path("", include(router.urls)),

config/settings.py

@@ -40,6 +40,7 @@ INSTALLED_APPS = [
     # local
     "users.apps.UsersConfig",
     "book.apps.BookConfig",
+    "loans.apps.LoansConfig",
     # 3rd party
     "rest_framework",
     "django_filters",
@@ -127,7 +128,7 @@ AUTH_PASSWORD_VALIDATORS = [
 
 LANGUAGE_CODE = "en-us"
 
-TIME_ZONE = "UTC"
+TIME_ZONE = "Asia/Jakarta"
 
 USE_I18N = True
 

loans/admin.py

+from django.contrib import admin
+
+# Register your models here.

loans/apps.py

+from django.apps import AppConfig
+
+
+class LoansConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'loans'

loans/migrations/0001_initial.py

+# Generated by Django 5.0.7 on 2024-07-14 12:04
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('book', '0005_remove_book_category_book_category'),
+        ('users', '0002_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='BookLoan',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('loan_date', models.DateTimeField(auto_now_add=True)),
+                ('due_date', models.DateTimeField()),
+                ('return_date', models.DateTimeField(blank=True, null=True)),
+                ('book', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, to='book.book')),
+                ('member', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, to='users.member')),
+            ],
+        ),
+    ]

loans/models.py

+from django.db import models
+
+from book.models import Book
+from users.models import Member
+
+
+class BookLoan(models.Model):
+    book = models.OneToOneField(Book, on_delete=models.CASCADE)
+    member = models.OneToOneField(Member, on_delete=models.CASCADE)
+    loan_date = models.DateTimeField(auto_now_add=True)
+    due_date = models.DateTimeField()
+    return_date = models.DateTimeField(blank=True, null=True)

loans/tests.py

+from django.test import TestCase

loans/views.py

+from django.shortcuts import render
+
+# Create your views here.