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Co-authored-by: aider (openai/DeepSeek-V3.2-Thinking) <aider@aider.chat>

inventory-backend/app/services/bom_service.py

@@ -11,6 +11,10 @@ class BomService:
         保存/更新父件的BOM子件关系
         child_list: [{"child_id": int, "dosage": float, "remark": str}, ...]
         """
+        # 校验父件不能与子件相同
+        for item in child_list:
+            if item['child_id'] == parent_id:
+                raise ValueError('父件与子件不能是同一物料')
         # 删除该父件原有的BOM记录
         BomTable.query.filter_by(parent_id=parent_id).delete()
         # 插入新的