feat: change segment_size to decimal in Product model

api_v1/tasks.py

@@ -193,9 +193,9 @@ def _upsert_product(product_data, merchant, category):
     pieces_int = _ensure_int(product_data.pieces)
     if pieces_int is not None:
         defaults['pieces'] = pieces_int
-    segment_int = _ensure_int(product_data.segment_size)
-    if segment_int is not None:
-        defaults['segment_size'] = segment_int
+    segment_decimal = _ensure_decimal(product_data.segment_size)
+    if segment_decimal is not None:
+        defaults['segment_size'] = segment_decimal
 
     product_obj, created = basic_models.Product.objects.get_or_create(
         merchant=merchant,

api_v1/test_mingdaoyun_utils.py

@@ -1,4 +1,5 @@
 import asyncio
+from decimal import Decimal
 from unittest.mock import patch
 
 from django.test import SimpleTestCase
@@ -99,7 +100,7 @@ class MingDaoYunParsersTestCase(SimpleTestCase):
         self.assertEqual(product.created_at, "2025-12-01 00:00:00")
         self.assertEqual(product.name, "产品A")
         self.assertEqual(product.pieces, 12)
-        self.assertEqual(product.segment_size, 3)
+        self.assertEqual(product.segment_size, Decimal("3"))
         # width 与 segment_size 当前共用同一个 controlId；保持同步代码现状
         self.assertEqual(product.width, "3")
         self.assertEqual(product.unit, "米")