fix: cascade relations

book_loans/migrations/0005_alter_bookloans_book_alter_bookloans_librarians_and_more.py

+# Generated by Django 5.0.6 on 2024-07-05 02:14
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('book_loans', '0004_alter_bookloans_return_date'),
+        ('books', '0002_book_stock'),
+        ('librarians', '0003_alter_loginhistory_table'),
+        ('members', '0006_alter_members_account_number'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='bookloans',
+            name='book',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='books.book'),
+        ),
+        migrations.AlterField(
+            model_name='bookloans',
+            name='librarians',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='librarians.librarians'),
+        ),
+        migrations.AlterField(
+            model_name='bookloans',
+            name='member',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='members.members'),
+        ),
+    ]

book_loans/models.py

@@ -5,9 +5,9 @@ from librarians.models import Librarians
 
 
 class BookLoans(models.Model):
-    book = models.ForeignKey(to=Book, on_delete=models.SET_NULL, null=True)
-    member = models.ForeignKey(to=Members, on_delete=models.SET_NULL, null=True)
-    librarians = models.ForeignKey(to=Librarians, on_delete=models.SET_NULL, null=True)
+    book = models.ForeignKey(to=Book, on_delete=models.CASCADE, null=True)
+    member = models.ForeignKey(to=Members, on_delete=models.CASCADE, null=True)
+    librarians = models.ForeignKey(to=Librarians, on_delete=models.CASCADE, null=True)
     notes = models.TextField(blank=True, null=True)
     loan_date = models.DateTimeField()
     due_date = models.DateTimeField()

book_loans/templates/book_loan_delete_form.html

@@ -24,7 +24,7 @@
       </div>
       <div class="modal-body">
         Once data is deleted, it cannot be restored.
-        <input type="hidden" name="id" id="almacen_id" />
+        <input type="hidden" name="book_id" id="almacen_id" value="{{ book_loan.book_id }}" />
       </div>
       <div class="modal-footer">
         <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">

book_loans/templates/loans.html

@@ -11,7 +11,6 @@
     >
       <i class="bi bi-plus-circle"></i> Add Book Loan
     </button>
-    {% include "search_form.html" %}
   </div>
   {% include "book_loan_table_data.html" %}
 </div>

book_loans/views.py

@@ -51,7 +51,7 @@ def index(request):
             )
 
     if request.method == "GET":
-        query = request.GET.get("q")
+        # query = request.GET.get("q")
         order = request.GET.get("o")
 
         # if query is not None:
@@ -113,6 +113,14 @@ def update(request, id):
                 notes=notes,
                 updated_at=datetime.now(),
             )
+
+            updated_loan = BookLoans.objects.get(id=id)
+            book = Book.objects.get(id=book_id)
+            new_stock = book.stock + 1
+
+            if updated_loan.return_date is not None and book.stock < new_stock:
+                Book.objects.filter(id=book_id).update(stock_in=new_stock)
+
             return HttpResponseRedirect("/dashboard/book-loans")
 
     context["form"] = form
@@ -124,7 +132,17 @@ def delete(request, id):
     book_loan = get_object_or_404(BookLoans, id=id)
 
     if request.method == "POST":
+        books = Book.objects.all()
+        book_id = request.POST["book_id"]
+
+        book = Book.objects.get(id=book_id)
+        new_stock = book.stock + 1
+
+        if book_loan.return_date is None:
+            books.filter(id=book_id).update(stock=new_stock)
+
         book_loan.delete()
+
         return HttpResponseRedirect("/dashboard/book-loans")
 
     return render(request, "loans.html", context)

members/migrations/0006_alter_members_account_number.py

+# Generated by Django 5.0.6 on 2024-07-05 02:14
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('members', '0005_alter_members_account_number'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='members',
+            name='account_number',
+            field=models.CharField(default='810779514016329', editable=False, max_length=15),
+        ),
+    ]