feat addded fully task 3

.gitignore

@@ -1,3 +1,4 @@
 *.pyc
 __pycache__/*
 inventory/migrations/__pycache__/0001_initial.cpython-310.pyc
+*.log

inventory/migrations/0003_alter_stockoperation_product_alter_inventory_product_and_more.py

@@ -0,0 +1,33 @@
+# Generated by Django 5.1.4 on 2025-01-08 16:17
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('inventory', '0002_contractor_position_truck_employee_supplycontract'),
+        ('product_directory', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='stockoperation',
+            name='product',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='product_directory.product', verbose_name='Товар'),
+        ),
+        migrations.AlterField(
+            model_name='inventory',
+            name='product',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='product_directory.product', verbose_name='Товар'),
+        ),
+        migrations.AlterField(
+            model_name='pricelist',
+            name='product',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='product_directory.product', verbose_name='Товар'),
+        ),
+        migrations.DeleteModel(
+            name='Product',
+        ),
+    ]

logs.log

@@ -133,3 +133,28 @@ Watching for file changes with StatReloader
 "GET /admin/jsi18n/ HTTP/1.1" 200 3342
 "GET /admin/warehouse/stockoperation/statistics/ HTTP/1.1" 200 28103
 "GET /admin/warehouse/stockoperation/ HTTP/1.1" 200 15416
+Watching for file changes with StatReloader
+Not Found: /
+"GET / HTTP/1.1" 404 2782
+"GET /api/pricing/ HTTP/1.1" 200 11324
+"GET /static/rest_framework/css/bootstrap.min.css HTTP/1.1" 304 0
+"GET /static/rest_framework/css/prettify.css HTTP/1.1" 304 0
+"GET /static/rest_framework/css/bootstrap-tweaks.css HTTP/1.1" 304 0
+"GET /static/rest_framework/js/csrf.js HTTP/1.1" 304 0
+"GET /static/rest_framework/js/jquery-3.7.1.min.js HTTP/1.1" 304 0
+"GET /static/rest_framework/css/default.css HTTP/1.1" 304 0
+"GET /static/rest_framework/js/bootstrap.min.js HTTP/1.1" 304 0
+"GET /static/rest_framework/js/ajax-form.js HTTP/1.1" 304 0
+"GET /static/rest_framework/js/prettify-min.js HTTP/1.1" 304 0
+"GET /static/rest_framework/js/default.js HTTP/1.1" 304 0
+"GET /static/rest_framework/js/load-ajax-form.js HTTP/1.1" 304 0
+"GET /static/rest_framework/img/grid.png HTTP/1.1" 304 0
+"GET /api/pricing/swagger/ HTTP/1.1" 200 2245
+"GET /static/drf-yasg/style.css HTTP/1.1" 304 0
+"GET /static/drf-yasg/swagger-ui-dist/swagger-ui.css HTTP/1.1" 304 0
+"GET /static/drf-yasg/swagger-ui-dist/swagger-ui-standalone-preset.js HTTP/1.1" 304 0
+"GET /static/drf-yasg/immutable.min.js HTTP/1.1" 304 0
+"GET /static/drf-yasg/swagger-ui-dist/swagger-ui-bundle.js HTTP/1.1" 304 0
+"GET /static/drf-yasg/insQ.min.js HTTP/1.1" 304 0
+"GET /static/drf-yasg/swagger-ui-init.js HTTP/1.1" 304 0
+"GET /api/pricing/swagger/?format=openapi HTTP/1.1" 200 44272

pricing/models.py

@@ -1,4 +1,7 @@
 from django.db import models
+from io import BytesIO
+from reportlab.lib.pagesizes import letter
+from reportlab.pdfgen import canvas
 
 # Справочник товаров
 class Product(models.Model):
@@ -38,7 +41,6 @@ class PriceList(models.Model):
     constraint_price_change = models.DecimalField(max_digits=5, decimal_places=2, default=90, verbose_name="Лимит на изменение цены (%)")
 
     def save(self, *args, **kwargs):
-        # Логика проверки на изменение цены
         if self.pk:
             old_price = PriceList.objects.get(pk=self.pk).final_price
             price_change_percent = abs((self.final_price - old_price) / old_price) * 100
@@ -82,6 +84,19 @@ class PriceTag(models.Model):
     tag_image = models.ImageField(upload_to='price_tags/', verbose_name="Изображение ценника", blank=True, null=True)
     price_effective_date = models.DateField(verbose_name="Дата вступления в силу ценника")
     
+    def generate_pdf(self):
+        """Генерация ценника в формате PDF."""
+        buffer = BytesIO()
+        c = canvas.Canvas(buffer, pagesize=letter)
+        c.drawString(100, 750, f"Продукт: {self.product.name}")
+        c.drawString(100, 730, f"Тип цены: {self.price_list.price_type.name}")
+        c.drawString(100, 710, f"Входная цена: {self.price_list.entry_price} руб.")
+        c.drawString(100, 690, f"Итоговая цена: {self.price_list.final_price} руб.")
+        c.showPage()
+        c.save()
+        buffer.seek(0)
+        return buffer
+
     def __str__(self):
         return f"Ценник для {self.product.name} - {self.price_effective_date}"
 
@@ -104,5 +119,10 @@ class PriceListWithDiscount(models.Model):
     discount = models.ForeignKey(Discount, on_delete=models.CASCADE, verbose_name="Скидка")
     final_price_after_discount = models.DecimalField(max_digits=10, decimal_places=2, verbose_name="Итоговая цена после скидки")
 
+    def save(self, *args, **kwargs):
+        # Расчёт итоговой цены с учётом скидки
+        self.final_price_after_discount = self.price_list.final_price - (self.price_list.final_price * self.discount.discount_percentage / 100)
+        super().save(*args, **kwargs)
+
     def __str__(self):
         return f"{self.price_list.product.name} - {self.final_price_after_discount} руб. (с учетом скидки)"