feat: replace color field with colors ManyToManyField in items model

- Updated `Item` model to use a ManyToManyField for colors, replacing the old ForeignKey relationship
- Modified templates to handle multiple color swatches in product details
- Updated admin for managing colors with `filter_horizontal`
- Adjusted views to prefetch related `colors` data for items
- Added migration to apply database changes

items/admin.py

@@ -59,7 +59,8 @@ class ItemAdmin(admin.ModelAdmin):
     form = ItemAdminForm
     save_as = True
     list_display = ('name', 'category', 'subcategory', 'price', 'discount_price', 'is_new', 'is_available', 'created_at')
-    list_filter = ('is_available', 'is_new', 'color', 'category', 'subcategory', 'created_at')
+    list_filter = ('is_available', 'is_new', 'colors', 'category', 'subcategory', 'created_at')
+    filter_horizontal = ('colors',)
     prepopulated_fields = {'slug': ('name',)}
     inlines = (ItemImageInline,)
 

items/migrations/0005_remove_item_color_item_colors.py

@@ -0,0 +1,22 @@
+# Generated by Django 6.0.5 on 2026-05-25 22:17
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('items', '0004_color_item_discount_price_item_is_new_item_color'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='item',
+            name='color',
+        ),
+        migrations.AddField(
+            model_name='item',
+            name='colors',
+            field=models.ManyToManyField(blank=True, related_name='items', to='items.color', verbose_name='Цвета'),
+        ),
+    ]

items/models.py

@@ -75,12 +75,11 @@ class Item(models.Model):
     )
     is_available = models.BooleanField(default=True, verbose_name='В наличии')
     is_new = models.BooleanField(default=False, verbose_name='Новинка')
-    color = models.ForeignKey(
+    colors = models.ManyToManyField(
         'Color',
-        on_delete=models.SET_NULL,
-        null=True, blank=True,
+        blank=True,
         related_name='items',
-        verbose_name='Цвет',
+        verbose_name='Цвета',
     )
     created_at = models.DateTimeField(auto_now_add=True, verbose_name='Дата создания')
     updated_at = models.DateTimeField(auto_now=True, verbose_name='Дата обновления')

items/views.py

@@ -260,8 +260,8 @@ def index(request: HttpRequest, category: str | None = None) -> HttpResponse:
 def detail(request: HttpRequest, category: str, slug: str) -> HttpResponse:
     try:
         item = (
-            Item.objects.select_related('category', 'subcategory', 'color')
-            .prefetch_related('images')
+            Item.objects.select_related('category', 'subcategory')
+            .prefetch_related('images', 'colors')
             .get(category__slug=category.lower(), slug=slug)
         )
     except Item.DoesNotExist: