feat: big

cost/migrations/0002_costentry_amount_formula_fields.py

@@ -0,0 +1,33 @@
+# Generated by Codex on 2026-06-30
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cost', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='costentry',
+            name='amount',
+            field=models.DecimalField(blank=True, decimal_places=2, max_digits=15, verbose_name='金额'),
+        ),
+        migrations.AddField(
+            model_name='costentry',
+            name='unit_amount',
+            field=models.DecimalField(blank=True, decimal_places=4, max_digits=15, null=True, verbose_name='单价/基数金额'),
+        ),
+        migrations.AddField(
+            model_name='costentry',
+            name='quantity',
+            field=models.DecimalField(blank=True, decimal_places=4, max_digits=12, null=True, verbose_name='数量/倍数'),
+        ),
+        migrations.AddField(
+            model_name='costentry',
+            name='unit_name',
+            field=models.CharField(blank=True, max_length=20, null=True, verbose_name='单位名称'),
+        ),
+    ]