feat: added n-to-1 relation between sales_order_item and printing_job model

flower/utils.py

@@ -226,6 +226,18 @@ def pick_product(fields: dict) -> Product:
     从字段字典中提取产品信息
     """
     data = {k: fields.get(v, '') for k, v in product_type_map.items()}
+
+    def _to_int(value):
+        if value in ('', None):
+            return None
+        try:
+            return int(value)
+        except (TypeError, ValueError):
+            return None
+
+    data['pieces'] = _to_int(data.get('pieces'))
+    data['segment_size'] = _to_int(data.get('segment_size'))
+
     return Product(**data)