Implement flexible order status management system

Features:
- Created OrderStatus model for managing statuses per tenant
- Added system-level statuses: draft, new, confirmed, in_assembly, in_delivery, completed, return, cancelled
- Implemented CRUD views for managing order statuses
- Created OrderStatusService with status transitions and business logic hooks
- Updated Order model to use ForeignKey to OrderStatus
- Added is_returned flag for tracking returned orders
- Updated filters to work with new OrderStatus model
- Created management command for status initialization
- Added HTML templates for status list, form, and confirmation
- Fixed views.py to use OrderStatus instead of removed STATUS_CHOICES

🤖 Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>

myproject/orders/views.py

@@ -6,8 +6,9 @@ from django.http import JsonResponse
 from django.views.decorators.http import require_http_methods
 from django.contrib.auth.decorators import login_required
 from django.core.exceptions import ValidationError
-from .models import Order, OrderItem, Address
-from .forms import OrderForm, OrderItemFormSet
+from django.db import models
+from .models import Order, OrderItem, Address, OrderStatus
+from .forms import OrderForm, OrderItemFormSet, OrderStatusForm
 from .filters import OrderFilter
 from .services import DraftOrderService
 from .services.address_service import AddressService
@@ -38,7 +39,7 @@ def order_list(request):
     context = {
         'filter': order_filter,
         'page_obj': page_obj,
-        'status_choices': Order.STATUS_CHOICES,
+        'status_choices': OrderStatus.objects.all().order_by('order'),
     }
 
     return render(request, 'orders/order_list.html', context)
@@ -79,7 +80,8 @@ def order_create(request):
 
             # Если нажата кнопка "Сохранить как черновик", создаем черновик
             if 'save_as_draft' in request.POST:
-                order.status = 'draft'
+                from .services.order_status_service import OrderStatusService
+                order.status = OrderStatusService.get_draft_status()
                 order.modified_by = request.user
 
             order.save()
@@ -471,6 +473,121 @@ def get_customer_address_history(request):
         }, status=500)
 
 
+# === УПРАВЛЕНИЕ СТАТУСАМИ ЗАКАЗОВ ===
+
+@login_required
+def order_status_list(request):
+    """Список всех статусов заказов"""
+    statuses = OrderStatus.objects.all().order_by('order', 'name')
+
+    # Добавляем информацию о количестве заказов для каждого статуса
+    for status in statuses:
+        status.orders_count = Order.objects.filter(status=status).count()
+
+    context = {
+        'statuses': statuses,
+        'title': 'Статусы заказов'
+    }
+
+    return render(request, 'orders/status_list.html', context)
+
+
+@login_required
+def order_status_create(request):
+    """Создание нового статуса"""
+    if request.method == 'POST':
+        form = OrderStatusForm(request.POST)
+
+        if form.is_valid():
+            status = form.save(commit=False)
+            status.created_by = request.user
+            status.updated_by = request.user
+
+            # Если не указан порядок - делаем его последним
+            if not status.order:
+                max_order = OrderStatus.objects.aggregate(models.Max('order'))['order__max'] or 0
+                status.order = max_order + 10
+
+            status.save()
+            messages.success(request, f'Статус "{status.name}" успешно создан')
+            return redirect('orders:status_list')
+    else:
+        form = OrderStatusForm()
+
+    context = {
+        'form': form,
+        'title': 'Создать новый статус',
+        'button_text': 'Создать'
+    }
+
+    return render(request, 'orders/status_form.html', context)
+
+
+@login_required
+def order_status_update(request, pk):
+    """Редактирование статуса"""
+    status = get_object_or_404(OrderStatus, pk=pk)
+
+    if request.method == 'POST':
+        form = OrderStatusForm(request.POST, instance=status)
+
+        if form.is_valid():
+            status = form.save(commit=False)
+            status.updated_by = request.user
+            status.save()
+            messages.success(request, f'Статус "{status.name}" успешно обновлен')
+            return redirect('orders:status_list')
+    else:
+        form = OrderStatusForm(instance=status)
+
+    context = {
+        'form': form,
+        'status': status,
+        'title': f'Редактировать статус: {status.name}',
+        'button_text': 'Сохранить',
+        'is_system': status.is_system
+    }
+
+    return render(request, 'orders/status_form.html', context)
+
+
+@login_required
+def order_status_delete(request, pk):
+    """Удаление статуса"""
+    status = get_object_or_404(OrderStatus, pk=pk)
+
+    if status.is_system:
+        messages.error(request, f'Нельзя удалить системный статус "{status.name}"')
+        return redirect('orders:status_list')
+
+    if request.method == 'POST':
+        # Проверяем, что статус не используется в заказах
+        orders_count = Order.objects.filter(status=status).count()
+
+        if orders_count > 0:
+            messages.error(
+                request,
+                f'Невозможно удалить статус. Есть {orders_count} заказов с этим статусом.'
+            )
+            return redirect('orders:status_list')
+
+        status_name = status.name
+        status.delete()
+        messages.success(request, f'Статус "{status_name}" успешно удален')
+        return redirect('orders:status_list')
+
+    # Информация для подтверждения удаления
+    orders_count = Order.objects.filter(status=status).count()
+
+    context = {
+        'status': status,
+        'orders_count': orders_count,
+        'title': 'Удалить статус'
+    }
+
+    return render(request, 'orders/status_confirm_delete.html', context)
+
+
 # === ВРЕМЕННЫЕ КОМПЛЕКТЫ ===
 # УДАЛЕНО: Логика создания временных комплектов перенесена в products.services.kit_service
 # Используйте API endpoint: products:api-temporary-kit-create