Initial commit: Django inventory system

myproject/orders/admin.py

@@ -0,0 +1,28 @@
+from django.contrib import admin
+from .models import Customer, Order, OrderItem
+
+
+class CustomerAdmin(admin.ModelAdmin):
+    list_display = ('first_name', 'last_name', 'email', 'phone', 'created_at')
+    list_filter = ('created_at', 'updated_at')
+    search_fields = ('first_name', 'last_name', 'email')
+    date_hierarchy = 'created_at'
+
+
+class OrderItemInline(admin.TabularInline):
+    model = OrderItem
+    extra = 1
+    readonly_fields = ('snapshot_name', 'snapshot_sku', 'sale_price', 'cost_price')
+
+
+class OrderAdmin(admin.ModelAdmin):
+    list_display = ('id', 'customer', 'status', 'total_price', 'created_at', 'updated_at')
+    list_filter = ('status', 'created_at', 'updated_at')
+    search_fields = ('customer__first_name', 'customer__last_name', 'customer__email', 'id')
+    date_hierarchy = 'created_at'
+    inlines = [OrderItemInline]
+
+
+admin.site.register(Customer, CustomerAdmin)
+admin.site.register(Order, OrderAdmin)
+admin.site.register(OrderItem)

myproject/orders/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class OrdersConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'orders'

myproject/orders/migrations/0001_initial.py

@@ -0,0 +1,89 @@
+# Generated by Django 5.2.7 on 2025-10-21 14:41
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('products', '0001_initial'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Customer',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('first_name', models.CharField(max_length=100, verbose_name='Имя')),
+                ('last_name', models.CharField(max_length=100, verbose_name='Фамилия')),
+                ('email', models.EmailField(max_length=254, unique=True, verbose_name='Email')),
+                ('phone', models.CharField(blank=True, max_length=20, null=True, verbose_name='Телефон')),
+                ('created_at', models.DateTimeField(auto_now_add=True, verbose_name='Дата регистрации')),
+                ('updated_at', models.DateTimeField(auto_now=True, verbose_name='Дата обновления')),
+                ('user', models.OneToOneField(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='customer', to=settings.AUTH_USER_MODEL, verbose_name='Пользователь')),
+            ],
+            options={
+                'verbose_name': 'Покупатель',
+                'verbose_name_plural': 'Покупатели',
+            },
+        ),
+        migrations.CreateModel(
+            name='Order',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('status', models.CharField(choices=[('created', 'Создан'), ('confirmed', 'Подтвержден'), ('assembled', 'Собран'), ('delivered', 'Доставлен'), ('cancelled', 'Отменен')], default='created', max_length=20, verbose_name='Статус')),
+                ('total_price', models.DecimalField(decimal_places=2, max_digits=10, verbose_name='Общая сумма')),
+                ('created_at', models.DateTimeField(auto_now_add=True, verbose_name='Дата создания')),
+                ('updated_at', models.DateTimeField(auto_now=True, verbose_name='Дата обновления')),
+                ('customer', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='orders', to='orders.customer', verbose_name='Клиент')),
+            ],
+            options={
+                'verbose_name': 'Заказ',
+                'verbose_name_plural': 'Заказы',
+            },
+        ),
+        migrations.CreateModel(
+            name='OrderItem',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('quantity', models.DecimalField(decimal_places=3, default=1, max_digits=10, verbose_name='Количество')),
+                ('snapshot_name', models.CharField(max_length=200, verbose_name='Название (на момент заказа)')),
+                ('snapshot_sku', models.CharField(blank=True, max_length=100, null=True, verbose_name='Артикул (на момент заказа)')),
+                ('sale_price', models.DecimalField(decimal_places=2, max_digits=10, verbose_name='Цена продажи')),
+                ('cost_price', models.DecimalField(decimal_places=2, max_digits=10, verbose_name='Себестоимость')),
+                ('composition_snapshot', models.JSONField(blank=True, null=True, verbose_name='Состав комплекта (снапшот)')),
+                ('kit', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='order_items', to='products.productkit', verbose_name='Комплект')),
+                ('order', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='items', to='orders.order', verbose_name='Заказ')),
+                ('product', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='order_items', to='products.product', verbose_name='Товар')),
+            ],
+            options={
+                'verbose_name': 'Позиция заказа',
+                'verbose_name_plural': 'Позиции заказов',
+            },
+        ),
+        migrations.AddIndex(
+            model_name='customer',
+            index=models.Index(fields=['email'], name='orders_cust_email_e97b09_idx'),
+        ),
+        migrations.AddIndex(
+            model_name='order',
+            index=models.Index(fields=['status'], name='orders_orde_status_c6dd84_idx'),
+        ),
+        migrations.AddIndex(
+            model_name='order',
+            index=models.Index(fields=['customer'], name='orders_orde_custome_59b6fb_idx'),
+        ),
+        migrations.AddIndex(
+            model_name='order',
+            index=models.Index(fields=['created_at'], name='orders_orde_created_0e92de_idx'),
+        ),
+        migrations.AddIndex(
+            model_name='orderitem',
+            index=models.Index(fields=['order'], name='orders_orde_order_i_5d347b_idx'),
+        ),
+    ]

myproject/orders/models.py

@@ -0,0 +1,135 @@
+from django.db import models
+from accounts.models import CustomUser
+from products.models import Product, ProductKit
+
+
+class Customer(models.Model):
+    """
+    Модель покупателя.
+    """
+    user = models.OneToOneField(CustomUser, on_delete=models.CASCADE, null=True, blank=True,
+                               related_name='customer', verbose_name="Пользователь")
+    first_name = models.CharField(max_length=100, verbose_name="Имя")
+    last_name = models.CharField(max_length=100, verbose_name="Фамилия")
+    email = models.EmailField(unique=True, verbose_name="Email")
+    phone = models.CharField(max_length=20, blank=True, null=True, verbose_name="Телефон")
+    created_at = models.DateTimeField(auto_now_add=True, verbose_name="Дата регистрации")
+    updated_at = models.DateTimeField(auto_now=True, verbose_name="Дата обновления")
+
+    class Meta:
+        verbose_name = "Покупатель"
+        verbose_name_plural = "Покупатели"
+        indexes = [
+            models.Index(fields=['email']),
+        ]
+
+    def __str__(self):
+        return f"{self.first_name} {self.last_name} ({self.email})"
+
+
+class Order(models.Model):
+    """
+    Заказ клиента.
+    """
+    STATUS_CHOICES = [
+        ('created', 'Создан'),
+        ('confirmed', 'Подтвержден'),
+        ('assembled', 'Собран'),
+        ('delivered', 'Доставлен'),
+        ('cancelled', 'Отменен'),
+    ]
+
+    customer = models.ForeignKey(Customer, on_delete=models.CASCADE, 
+                                related_name='orders', verbose_name="Клиент")
+    status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='created',
+                              verbose_name="Статус")
+    total_price = models.DecimalField(max_digits=10, decimal_places=2, verbose_name="Общая сумма")
+    created_at = models.DateTimeField(auto_now_add=True, verbose_name="Дата создания")
+    updated_at = models.DateTimeField(auto_now=True, verbose_name="Дата обновления")
+
+    class Meta:
+        verbose_name = "Заказ"
+        verbose_name_plural = "Заказы"
+        indexes = [
+            models.Index(fields=['status']),
+            models.Index(fields=['customer']),
+            models.Index(fields=['created_at']),
+        ]
+
+    def __str__(self):
+        return f"Заказ #{self.id} - {self.customer}"
+
+
+class OrderItem(models.Model):
+    """
+    Строка заказа — может быть простым товаром или комплектом.
+    """
+    order = models.ForeignKey(Order, on_delete=models.CASCADE, 
+                             related_name='items', verbose_name="Заказ")
+    product = models.ForeignKey(Product, on_delete=models.CASCADE, null=True, blank=True,
+                               related_name='order_items', verbose_name="Товар")
+    kit = models.ForeignKey(ProductKit, on_delete=models.CASCADE, null=True, blank=True,
+                           related_name='order_items', verbose_name="Комплект")
+    quantity = models.DecimalField(max_digits=10, decimal_places=3, default=1,
+                                  verbose_name="Количество")
+
+    # Снапшот-поля (для истории и отчётов)
+    snapshot_name = models.CharField(max_length=200, verbose_name="Название (на момент заказа)")
+    snapshot_sku = models.CharField(max_length=100, blank=True, null=True,
+                                   verbose_name="Артикул (на момент заказа)")
+    sale_price = models.DecimalField(max_digits=10, decimal_places=2, verbose_name="Цена продажи")
+    cost_price = models.DecimalField(max_digits=10, decimal_places=2, verbose_name="Себестоимость")
+    composition_snapshot = models.JSONField(null=True, blank=True,
+                                           verbose_name="Состав комплекта (снапшот)")
+
+    class Meta:
+        verbose_name = "Позиция заказа"
+        verbose_name_plural = "Позиции заказов"
+        indexes = [
+            models.Index(fields=['order']),
+        ]
+
+    def save(self, *args, **kwargs):
+        # Валидация: либо product, либо kit, но не оба
+        if self.product and self.kit:
+            raise ValueError("Нельзя одновременно указать товар и комплект")
+        if not self.product and not self.kit:
+            raise ValueError("Необходимо указать либо товар, либо комплект")
+
+        # Заполнение снапшот-полей
+        if self.product:
+            if not self.snapshot_name:
+                self.snapshot_name = self.product.name
+            if not self.snapshot_sku:
+                self.snapshot_sku = self.product.sku
+            if not self.sale_price:
+                self.sale_price = self.product.sale_price
+            if not self.cost_price:
+                self.cost_price = self.product.cost_price
+        elif self.kit:
+            if not self.snapshot_name:
+                self.snapshot_name = self.kit.name
+            if not self.sale_price or not self.cost_price:
+                # Здесь можно реализовать логику подсчета цены комплекта
+                # в зависимости от метода ценообразования
+                if self.kit.pricing_method == 'fixed' and self.kit.fixed_price:
+                    self.sale_price = self.kit.fixed_price
+                # В реальном приложении нужно реализовать все методы ценообразования
+            if self.kit.pricing_method != 'fixed' and not self.composition_snapshot:
+                # Формирование снапшота состава комплекта
+                composition = []
+                for item in self.kit.kit_items.all():
+                    composition.append({
+                        "product_id": item.product.id,
+                        "name": item.product.name,
+                        "sku": item.product.sku,
+                        "quantity": float(item.quantity),
+                        "cost_price": float(item.product.cost_price),
+                        "sale_price": float(item.product.sale_price)
+                    })
+                self.composition_snapshot = composition
+
+        super().save(*args, **kwargs)
+
+    def __str__(self):
+        return f"{self.snapshot_name} x{self.quantity} в заказе #{self.order.id}"

myproject/orders/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

myproject/orders/views.py

@@ -0,0 +1,3 @@
+from django.shortcuts import render
+
+# Create your views here.