Changed work of shelf books

backend/apps/shelf_books/migrations/0001_initial.py

@@ -0,0 +1,29 @@
+# Generated by Django 6.0.3 on 2026-03-22 12:16
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('books', '0001_initial'),
+        ('shelves', '0002_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ShelfItem',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('quantity', models.PositiveIntegerField(default=0)),
+                ('book', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='shelf_items', to='books.book')),
+                ('shelf', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='book_items', to='shelves.shelf')),
+            ],
+            options={
+                'constraints': [models.UniqueConstraint(fields=('book', 'shelf'), name='unique_book_per_shelf')],
+            },
+        ),
+    ]

backend/apps/shelf_books/migrations/0002_rename_shelfitem_shelfbook.py

@@ -0,0 +1,19 @@
+# Generated by Django 6.0.3 on 2026-03-22 12:53
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('books', '0001_initial'),
+        ('shelf_books', '0001_initial'),
+        ('shelves', '0002_initial'),
+    ]
+
+    operations = [
+        migrations.RenameModel(
+            old_name='ShelfItem',
+            new_name='ShelfBook',
+        ),
+    ]