feat: Модуль "Приемка товаров"

## Задачи:

1. Реализовать функционал для приемки товара:

- Проверка товара по количеству, качеству и сроку годности.

- Автоматическое добавление товара на склад, если все параметры соответствуют.

- Создание акта приемки с возможностью указания причин отклонений.

2. Реализовать логику учета состояния товаров (повреждения, не соответствие).

3. Реестор складов хранения товаров.

goods_reception/admin.py

@@ -0,0 +1,8 @@
+from django.contrib import admin
+from .models import GoodsReception
+
+@admin.register(GoodsReception)
+class GoodsReceptionAdmin(admin.ModelAdmin):
+    list_display = ('product', 'quantity', 'quality_check', 'shelf_life_valid', 'is_accepted', 'rejection_reason')
+    search_fields = ('product__name',)
+    list_filter = ('is_accepted', 'quality_check', 'shelf_life_valid')

goods_reception/api_views.py

@@ -0,0 +1,23 @@
+from rest_framework.viewsets import ModelViewSet
+from .models import GoodsReception
+from .serializers import GoodsReceptionSerializer
+from warehouse.models import Stock
+
+class GoodsReceptionViewSet(ModelViewSet):
+    """
+    API для работы с приемкой товаров.
+    """
+    queryset = GoodsReception.objects.all()
+    serializer_class = GoodsReceptionSerializer
+
+    def perform_create(self, serializer):
+        reception = serializer.save()
+        if reception.is_accepted:
+            # Добавление на склад
+            stock, created = Stock.objects.get_or_create(
+                product=reception.product,
+                location="Основной склад",
+                defaults={'quantity': 0},
+            )
+            stock.quantity += reception.quantity
+            stock.save()

goods_reception/apps.py

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

goods_reception/forms.py

@@ -0,0 +1,13 @@
+from django import forms
+from .models import GoodsReception
+
+class GoodsReceptionForm(forms.ModelForm):
+    class Meta:
+        model = GoodsReception
+        fields = '__all__'
+
+    def clean(self):
+        cleaned_data = super().clean()
+        if not cleaned_data.get('quality_check') or not cleaned_data.get('shelf_life_valid'):
+            cleaned_data['is_accepted'] = False
+        return cleaned_data

goods_reception/migrations/0001_initial.py

@@ -0,0 +1,28 @@
+# Generated by Django 5.1.4 on 2025-01-08 14:37
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('product_directory', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='GoodsReception',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('quantity', models.PositiveIntegerField(verbose_name='Количество')),
+                ('quality_check', models.BooleanField(verbose_name='Проверка качества')),
+                ('shelf_life_valid', models.BooleanField(verbose_name='Срок годности соответствует')),
+                ('is_accepted', models.BooleanField(default=False, verbose_name='Принят')),
+                ('rejection_reason', models.TextField(blank=True, null=True, verbose_name='Причина отклонения')),
+                ('product', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='product_directory.product', verbose_name='Товар')),
+            ],
+        ),
+    ]

goods_reception/models.py

@@ -0,0 +1,13 @@
+from django.db import models
+from product_directory.models import Product
+
+class GoodsReception(models.Model):
+    product = models.ForeignKey(Product, on_delete=models.CASCADE, verbose_name="Товар")
+    quantity = models.PositiveIntegerField(verbose_name="Количество")
+    quality_check = models.BooleanField(verbose_name="Проверка качества")
+    shelf_life_valid = models.BooleanField(verbose_name="Срок годности соответствует")
+    is_accepted = models.BooleanField(verbose_name="Принят", default=False)
+    rejection_reason = models.TextField(verbose_name="Причина отклонения", blank=True, null=True)
+
+    def __str__(self):
+        return f"Приемка: {self.product.name}"

goods_reception/serializers.py

@@ -0,0 +1,12 @@
+from rest_framework import serializers
+from .models import GoodsReception
+
+class GoodsReceptionSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = GoodsReception
+        fields = '__all__'
+
+    def validate(self, data):
+        if not data['quality_check'] or not data['shelf_life_valid']:
+            raise serializers.ValidationError("Товар не прошёл проверку качества или срок годности истёк.")
+        return data

goods_reception/signals.py

@@ -0,0 +1,24 @@
+from django.db.models.signals import post_save
+from django.dispatch import receiver
+from goods_reception.models import GoodsReception
+from warehouse.models import StockOperation, Warehouse, StorageLocation
+
+@receiver(post_save, sender=GoodsReception)
+def handle_goods_reception(sender, instance, created, **kwargs):
+    if created and instance.is_accepted:
+        # операция прихода
+        operation = StockOperation.objects.create(
+            product=instance.product,
+            warehouse=Warehouse.objects.get(name="Основной склад"),
+            storage_location=StorageLocation.objects.filter(warehouse__name="Основной склад").first(),
+            operation_type='Incoming',
+            quantity=instance.quantity,
+            expiration_date=None  # Укажите срок годности, если известно
+        )
+
+        # логика распределения по местам хранения
+        if instance.product.storage_temperature == "+4C":
+            cold_storage = StorageLocation.objects.filter(warehouse=operation.warehouse, temperature_control=True).first()
+            if cold_storage:
+                operation.storage_location = cold_storage
+                operation.save()

goods_reception/templates/goods_reception/reception_report.html

@@ -0,0 +1,19 @@
+<h1>Акт приемки</h1>
+<table>
+    <tr>
+        <th>Товар</th>
+        <th>Количество</th>
+        <th>Качество</th>
+        <th>Срок годности</th>
+        <th>Причина отклонения</th>
+    </tr>
+    {% for reception in receptions %}
+    <tr>
+        <td>{{ reception.product.name }}</td>
+        <td>{{ reception.quantity }}</td>
+        <td>{{ reception.quality_check }}</td>
+        <td>{{ reception.shelf_life_valid }}</td>
+        <td>{{ reception.rejection_reason }}</td>
+    </tr>
+    {% endfor %}
+</table>

goods_reception/tests.py

@@ -0,0 +1,18 @@
+from django.test import TestCase
+from .models import Product
+
+class ProductTestCase(TestCase):
+    def test_product_creation(self):
+        product = Product.objects.create(
+            name="Тестовый товар",
+            barcode="1234567890123",
+            shelf_life_days=365,
+            dimensions="10x10x10",
+            unit_of_measure="шт.",
+            manufacturer="Производитель",
+            category="Food",
+            storage_temperature="+4C",
+            promotion="1+1"
+        )
+        self.assertEqual(Product.objects.count(), 1)
+        self.assertEqual(product.name, "Тестовый товар")

goods_reception/tests/test_api.py

@@ -0,0 +1,36 @@
+from rest_framework.test import APITestCase
+from rest_framework import status
+from .models import GoodsReception
+from product_directory.models import Product
+
+class GoodsReceptionAPITestCase(APITestCase):
+    def setUp(self):
+        self.product = Product.objects.create(
+            name="Тестовый товар",
+            barcode="1234567890123",
+            shelf_life_days=365,
+            dimensions="10x10x10",
+            unit_of_measure="шт.",
+            manufacturer="Производитель",
+            category="Food",
+            storage_temperature="+4C",
+            promotion="1+1"
+        )
+        self.goods_reception_data = {
+            "product": self.product.id,
+            "quantity": 10,
+            "quality_check": True,
+            "shelf_life_valid": True,
+            "is_accepted": True,
+            "rejection_reason": None
+        }
+
+    def test_create_goods_reception(self):
+        response = self.client.post('/goods-reception/api/goods-receptions/', self.goods_reception_data)
+        self.assertEqual(response.status_code, status.HTTP_201_CREATED)
+
+    def test_list_goods_receptions(self):
+        GoodsReception.objects.create(**self.goods_reception_data)
+        response = self.client.get('/goods-reception/api/goods-receptions/')
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertEqual(len(response.data), 1)

goods_reception/urls.py

@@ -0,0 +1,10 @@
+from django.urls import path, include
+from rest_framework.routers import DefaultRouter
+from .api_views import GoodsReceptionViewSet
+
+router = DefaultRouter()
+router.register(r'goods-receptions', GoodsReceptionViewSet, basename='goods-reception')
+
+urlpatterns = [
+    path('api/', include(router.urls)),
+]

goods_reception/views.py

@@ -0,0 +1,17 @@
+from django.shortcuts import render, redirect
+from .forms import GoodsReceptionForm
+from .models import GoodsReception
+
+def goods_reception_list(request):
+    receptions = GoodsReception.objects.all()
+    return render(request, 'goods_reception/goods_reception_list.html', {'receptions': receptions})
+
+def goods_reception_create(request):
+    if request.method == 'POST':
+        form = GoodsReceptionForm(request.POST)
+        if form.is_valid():
+            form.save()
+            return redirect('goods_reception_list')
+    else:
+        form = GoodsReceptionForm()
+    return render(request, 'goods_reception/goods_reception_form.html', {'form': form})

logs.log

@@ -1,2 +1,101 @@
 Watching for file changes with StatReloader
 Watching for file changes with StatReloader
+Watching for file changes with StatReloader
+Not Found: /
+"GET / HTTP/1.1" 404 2456
+Not Found: /goods-reception
+"GET /goods-reception HTTP/1.1" 404 2519
+"GET /goods-reception/api HTTP/1.1" 301 0
+"GET /goods-reception/api/ HTTP/1.1" 200 5454
+"GET /static/rest_framework/css/prettify.css HTTP/1.1" 200 817
+"GET /static/rest_framework/css/bootstrap-tweaks.css HTTP/1.1" 200 3426
+"GET /static/rest_framework/css/default.css HTTP/1.1" 200 1152
+"GET /static/rest_framework/js/ajax-form.js HTTP/1.1" 200 3796
+"GET /static/rest_framework/js/prettify-min.js HTTP/1.1" 200 13632
+"GET /static/rest_framework/css/bootstrap.min.css HTTP/1.1" 200 121457
+"GET /static/rest_framework/js/default.js HTTP/1.1" 200 1268
+"GET /static/rest_framework/js/csrf.js HTTP/1.1" 200 1793
+"GET /static/rest_framework/js/jquery-3.7.1.min.js HTTP/1.1" 200 87533
+"GET /static/rest_framework/js/load-ajax-form.js HTTP/1.1" 200 59
+"GET /static/rest_framework/js/bootstrap.min.js HTTP/1.1" 200 39680
+"GET /static/rest_framework/img/grid.png HTTP/1.1" 200 1458
+"GET /goods-reception/api/ HTTP/1.1" 200 5454
+"OPTIONS /goods-reception/api/ HTTP/1.1" 200 5662
+"GET /goods-reception/api/ HTTP/1.1" 200 5454
+Not Found: /goods-reception/swagger
+"GET /goods-reception/swagger HTTP/1.1" 404 2637
+"GET /api/swagger/ HTTP/1.1" 200 2456
+"GET /api/swagger/?format=openapi HTTP/1.1" 200 21094
+"GET /goods-reception/api/goods-receptions/ HTTP/1.1" 200 2
+"GET /admin/ HTTP/1.1" 200 7189
+/Users/darius/Documents/franchise_store/goods_reception/admin.py changed, reloading.
+Watching for file changes with StatReloader
+"GET /admin/ HTTP/1.1" 200 8161
+"GET /admin/goods_reception/goodsreception/ HTTP/1.1" 200 10520
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /static/admin/img/icon-viewlink.svg HTTP/1.1" 200 581
+"GET /admin/ HTTP/1.1" 200 8161
+"GET /admin/product_directory/product/ HTTP/1.1" 200 11170
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/ HTTP/1.1" 200 8161
+"GET /admin/goods_reception/goodsreception/ HTTP/1.1" 200 10520
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/goods_reception/goodsreception/add/ HTTP/1.1" 200 13670
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"POST /admin/goods_reception/goodsreception/add/ HTTP/1.1" 302 0
+"GET /admin/goods_reception/goodsreception/ HTTP/1.1" 200 13308
+"GET /static/admin/img/icon-no.svg HTTP/1.1" 200 560
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/goods_reception/goodsreception/1/change/ HTTP/1.1" 200 13985
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/goods_reception/goodsreception/ HTTP/1.1" 200 13062
+Watching for file changes with StatReloader
+"GET /admin/ HTTP/1.1" 200 9417
+"GET /admin/ HTTP/1.1" 200 9417
+"GET /admin/warehouse/stock/ HTTP/1.1" 200 10410
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/ HTTP/1.1" 200 9417
+/Users/darius/Documents/franchise_store/warehouse/models.py changed, reloading.
+Watching for file changes with StatReloader
+/Users/darius/Documents/franchise_store/warehouse/models.py changed, reloading.
+Watching for file changes with StatReloader
+/Users/darius/Documents/franchise_store/warehouse/models.py changed, reloading.
+Watching for file changes with StatReloader
+Watching for file changes with StatReloader
+"GET /admin/ HTTP/1.1" 200 10808
+"GET /admin/warehouse/storagelocation/ HTTP/1.1" 200 11604
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/warehouse/storagelocation/add/ HTTP/1.1" 200 13587
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/warehouse/storagelocation/ HTTP/1.1" 200 11604
+"GET /admin/ HTTP/1.1" 200 10808
+"GET /admin/warehouse/warehouse/ HTTP/1.1" 200 10710
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/warehouse/warehouse/add/ HTTP/1.1" 200 12376
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"POST /admin/warehouse/warehouse/add/ HTTP/1.1" 302 0
+"GET /admin/warehouse/warehouse/ HTTP/1.1" 200 12695
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/warehouse/warehouse/1/change/ HTTP/1.1" 200 12651
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/warehouse/storagelocation/ HTTP/1.1" 200 11604
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/warehouse/storagelocation/add/ HTTP/1.1" 200 13632
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"POST /admin/warehouse/storagelocation/add/ HTTP/1.1" 302 0
+"GET /admin/warehouse/storagelocation/ HTTP/1.1" 200 13712
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/warehouse/stockoperation/ HTTP/1.1" 200 12593
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/warehouse/stockoperation/add/ HTTP/1.1" 200 19071
+"GET /static/admin/js/calendar.js HTTP/1.1" 200 9141
+"GET /static/admin/js/admin/DateTimeShortcuts.js HTTP/1.1" 200 19319
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /static/admin/img/icon-calendar.svg HTTP/1.1" 200 1086
+"GET /static/admin/img/calendar-icons.svg HTTP/1.1" 200 2455
+"POST /admin/warehouse/stockoperation/add/ HTTP/1.1" 302 0
+"GET /admin/warehouse/stockoperation/ HTTP/1.1" 200 15070
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/warehouse/stockoperation/1/change/ HTTP/1.1" 200 19394
+"GET /admin/jsi18n/ HTTP/1.1" 200 3342
+"GET /admin/warehouse/stockoperation/ HTTP/1.1" 200 14799

settings/base.py

@@ -56,7 +56,9 @@ INSTALLED_APPS = [
     'django.contrib.staticfiles',
     'rest_framework',
     'inventory',
+    'warehouse',
     'product_directory',
+    'goods_reception',
 ]
 
 ROOT_URLCONF = 'urls'

urls.py

@@ -4,4 +4,6 @@ from django.urls import path, include
 urlpatterns = [
     path('admin/', admin.site.urls),
     path('api/', include('inventory.urls')),
+    path('goods-reception/', include('goods_reception.urls')),
+    path('warehouse/', include('warehouse.urls')),
 ]

warehouse/admin.py

@@ -0,0 +1,21 @@
+from django.contrib import admin
+from .models import Warehouse, StorageLocation, StockOperation
+
+@admin.register(Warehouse)
+class WarehouseAdmin(admin.ModelAdmin):
+    list_display = ('name', 'location', 'is_active')
+    search_fields = ('name', 'location')
+
+
+@admin.register(StorageLocation)
+class StorageLocationAdmin(admin.ModelAdmin):
+    list_display = ('name', 'warehouse', 'temperature_control')
+    search_fields = ('name', 'warehouse__name')
+    list_filter = ('temperature_control',)
+
+
+@admin.register(StockOperation)
+class StockOperationAdmin(admin.ModelAdmin):
+    list_display = ('product', 'warehouse', 'operation_type', 'quantity', 'operation_date')
+    search_fields = ('product__name', 'warehouse__name', 'operation_type')
+    list_filter = ('operation_type', 'operation_date')

warehouse/api_views.py

@@ -0,0 +1,11 @@
+from rest_framework.viewsets import ModelViewSet
+from .models import StockOperation
+from .serializers import StockOperationSerializer
+
+class StockOperationViewSet(ModelViewSet):
+    queryset = StockOperation.objects.all()
+    serializer_class = StockOperationSerializer
+
+def handle_goods_reception(sender, instance, created, **kwargs):
+    if created and instance.is_accepted:
+        from warehouse.models import Stock

warehouse/apps.py

@@ -0,0 +1,9 @@
+from django.apps import AppConfig
+
+
+class WarehouseConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'warehouse'
+
+    def ready(self):
+        import goods_reception.signals

warehouse/migrations/0001_initial.py

@@ -0,0 +1,30 @@
+# Generated by Django 5.1.4 on 2025-01-08 15:13
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('product_directory', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Stock',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('quantity', models.PositiveIntegerField(default=0, verbose_name='Количество')),
+                ('location', models.CharField(max_length=255, verbose_name='Место хранения')),
+                ('product', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='product_directory.product', verbose_name='Товар')),
+            ],
+            options={
+                'verbose_name': 'Складская запись',
+                'verbose_name_plural': 'Складские записи',
+                'unique_together': {('product', 'location')},
+            },
+        ),
+    ]

warehouse/migrations/0002_warehouse_alter_stock_options_and_more.py

@@ -0,0 +1,67 @@
+# Generated by Django 5.1.4 on 2025-01-08 15:29
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('product_directory', '0001_initial'),
+        ('warehouse', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Warehouse',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=255, verbose_name='Название склада')),
+                ('location', models.CharField(max_length=255, verbose_name='Расположение склада')),
+                ('is_active', models.BooleanField(default=True, verbose_name='Активен')),
+            ],
+            options={
+                'verbose_name': 'Склад',
+                'verbose_name_plural': 'Склады',
+            },
+        ),
+        migrations.AlterModelOptions(
+            name='stock',
+            options={},
+        ),
+        migrations.AlterUniqueTogether(
+            name='stock',
+            unique_together=set(),
+        ),
+        migrations.CreateModel(
+            name='StorageLocation',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=255, verbose_name='Место хранения')),
+                ('temperature_control', models.BooleanField(default=False, verbose_name='Требуется контроль температуры')),
+                ('warehouse', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='storage_locations', to='warehouse.warehouse', verbose_name='Склад')),
+            ],
+            options={
+                'verbose_name': 'Место хранения',
+                'verbose_name_plural': 'Места хранения',
+            },
+        ),
+        migrations.CreateModel(
+            name='StockOperation',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('operation_type', models.CharField(choices=[('Incoming', 'Приход'), ('Outgoing', 'Расход'), ('Transfer', 'Перемещение'), ('WriteOff', 'Списание')], max_length=50, verbose_name='Тип операции')),
+                ('quantity', models.PositiveIntegerField(verbose_name='Количество')),
+                ('operation_date', models.DateTimeField(auto_now_add=True, verbose_name='Дата операции')),
+                ('expiration_date', models.DateField(blank=True, null=True, verbose_name='Срок годности')),
+                ('reason', models.TextField(blank=True, null=True, verbose_name='Причина (для списания)')),
+                ('product', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='warehouse_stock_operations', to='product_directory.product', verbose_name='Товар')),
+                ('storage_location', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='warehouse.storagelocation', verbose_name='Место хранения')),
+                ('warehouse', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='warehouse.warehouse', verbose_name='Склад')),
+            ],
+            options={
+                'verbose_name': 'Операция с товаром',
+                'verbose_name_plural': 'Операции с товарами',
+            },
+        ),
+    ]

warehouse/models.py

@@ -0,0 +1,64 @@
+from django.db import models
+from product_directory.models import Product
+
+class Warehouse(models.Model):
+    name = models.CharField(max_length=255, verbose_name="Название склада")
+    location = models.CharField(max_length=255, verbose_name="Расположение склада")
+    is_active = models.BooleanField(default=True, verbose_name="Активен")
+
+    class Meta:
+        verbose_name = "Склад"
+        verbose_name_plural = "Склады"
+
+    def __str__(self):
+        return self.name
+
+
+class StorageLocation(models.Model):
+    warehouse = models.ForeignKey(Warehouse, on_delete=models.CASCADE, related_name="storage_locations", verbose_name="Склад")
+    name = models.CharField(max_length=255, verbose_name="Место хранения")
+    temperature_control = models.BooleanField(default=False, verbose_name="Требуется контроль температуры")
+
+    class Meta:
+        verbose_name = "Место хранения"
+        verbose_name_plural = "Места хранения"
+
+    def __str__(self):
+        return f"{self.name} ({self.warehouse.name})"
+
+class Stock(models.Model):
+    product = models.ForeignKey(Product, on_delete=models.CASCADE, verbose_name="Товар")
+    quantity = models.PositiveIntegerField(default=0, verbose_name="Количество")
+    location = models.CharField(max_length=255, verbose_name="Место хранения")
+
+    def __str__(self):
+        return f"{self.product.name} - {self.quantity} шт."
+
+class StockOperation(models.Model):
+    OPERATION_TYPE_CHOICES = [
+        ('Incoming', 'Приход'),
+        ('Outgoing', 'Расход'),
+        ('Transfer', 'Перемещение'),
+        ('WriteOff', 'Списание'),
+    ]
+
+    product = models.ForeignKey(
+        Product,
+        on_delete=models.CASCADE,
+        verbose_name="Товар",
+        related_name="warehouse_stock_operations"
+    )
+    warehouse = models.ForeignKey(Warehouse, on_delete=models.CASCADE, verbose_name="Склад")
+    storage_location = models.ForeignKey(StorageLocation, on_delete=models.CASCADE, verbose_name="Место хранения")
+    operation_type = models.CharField(max_length=50, choices=OPERATION_TYPE_CHOICES, verbose_name="Тип операции")
+    quantity = models.PositiveIntegerField(verbose_name="Количество")
+    operation_date = models.DateTimeField(auto_now_add=True, verbose_name="Дата операции")
+    expiration_date = models.DateField(blank=True, null=True, verbose_name="Срок годности")
+    reason = models.TextField(blank=True, null=True, verbose_name="Причина (для списания)")
+
+    class Meta:
+        verbose_name = "Операция с товаром"
+        verbose_name_plural = "Операции с товарами"
+
+    def __str__(self):
+        return f"{self.operation_type} - {self.product.name} ({self.warehouse.name})"

warehouse/serializers.py

@@ -0,0 +1,7 @@
+from rest_framework import serializers
+from .models import StockOperation
+
+class StockOperationSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = StockOperation
+        fields = '__all__'

warehouse/services.py

@@ -0,0 +1,53 @@
+from . import models
+from .models import StockOperation
+
+def register_incoming_stock(product, quantity, warehouse, expiration_date=None):
+    operation = StockOperation.objects.create(
+        product=product,
+        quantity=quantity,
+        warehouse=warehouse,
+        operation_type='Incoming',
+        expiration_date=expiration_date
+    )
+
+    # Распределение по местам хранения
+    if product.storage_temperature:
+        storage_location = "Холодильник" if product.storage_temperature == "+4C" else "Полка"
+        operation.storage_location = storage_location
+        operation.save()
+    return operation
+
+def transfer_stock(product, quantity, from_warehouse, to_location):
+    total_stock = StockOperation.objects.filter(
+        product=product, warehouse=from_warehouse, operation_type='Incoming'
+    ).aggregate(total=models.Sum('quantity'))['total'] or 0
+
+    if total_stock < quantity:
+        raise ValueError("Недостаточно товара на складе для перемещения.")
+
+    transfer_operation = StockOperation.objects.create(
+        product=product,
+        quantity=quantity,
+        warehouse=from_warehouse,
+        storage_location=to_location,
+        operation_type='Transfer'
+    )
+    return transfer_operation
+
+
+def write_off_stock(product, quantity, warehouse, reason):
+    total_stock = StockOperation.objects.filter(
+        product=product, warehouse=warehouse, operation_type='Incoming'
+    ).aggregate(total=models.Sum('quantity'))['total'] or 0
+
+    if total_stock < quantity:
+        raise ValueError("Недостаточно товара на складе для списания.")
+
+    write_off_operation = StockOperation.objects.create(
+        product=product,
+        quantity=quantity,
+        warehouse=warehouse,
+        operation_type='WriteOff',
+        reason=reason
+    )
+    return write_off_operation

warehouse/tests.py

@@ -0,0 +1,57 @@
+from django.test import TestCase
+from product_directory.models import Product
+from .models import Stock, Warehouse, StorageLocation, StockOperation
+
+
+class StockTestCase(TestCase):
+    def setUp(self):
+        self.product = Product.objects.create(
+            name="Тестовый товар",
+            barcode="1234567890123",
+            shelf_life_days=365,
+            dimensions="10x10x10",
+            unit_of_measure="шт.",
+            manufacturer="Производитель",
+            category="Food",
+            storage_temperature="+4C",
+            promotion="1+1"
+        )
+        self.stock = Stock.objects.create(
+            product=self.product,
+            quantity=100,
+            location="Основной склад"
+        )
+
+    def test_stock_creation(self):
+        self.assertEqual(self.stock.quantity, 100)
+
+    def test_stock_update(self):
+        self.stock.quantity += 50
+        self.stock.save()
+        self.assertEqual(self.stock.quantity, 150)
+
+class StockOperationTestCase(TestCase):
+    def setUp(self):
+        self.warehouse = Warehouse.objects.create(name="Основной склад", location="Москва")
+        self.storage = StorageLocation.objects.create(warehouse=self.warehouse, name="Холодильник", temperature_control=True)
+        self.product = Product.objects.create(
+            name="Тестовый товар",
+            barcode="1234567890123",
+            shelf_life_days=365,
+            dimensions="10x10x10",
+            unit_of_measure="шт.",
+            manufacturer="Производитель",
+            category="Food",
+            storage_temperature="+4C",
+            promotion="1+1"
+        )
+
+    def test_incoming_operation(self):
+        operation = StockOperation.objects.create(
+            product=self.product,
+            warehouse=self.warehouse,
+            storage_location=self.storage,
+            operation_type="Incoming",
+            quantity=100
+        )
+        self.assertEqual(operation.quantity, 100)

warehouse/urls.py

@@ -0,0 +1,10 @@
+from django.urls import path, include
+from rest_framework.routers import DefaultRouter
+from .api_views import StockOperationViewSet
+
+router = DefaultRouter()
+router.register(r'stock-operations', StockOperationViewSet, basename='stock-operation')
+
+urlpatterns = [
+    path('api/', include(router.urls)),
+]

warehouse/views.py

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