feat: BOM 子件展示自制件 BOM 版本号——子件列表与出库/借库 BOM 清单打印均显示

inventory-backend/app/services/bom_service.py

@@ -320,13 +320,28 @@ class BomService:
         parent_material = MaterialBase.query.get(parent_id)
 
         children = []
+
+        # ★ 子件若本身是"自制件"（也是某 BOM 的父件），带出它的 BOM 编号与最新版本号（仅展示识别用）
+        child_self_bom = {}
+        self_ids = [bom.child_id for bom, _, _ in rows if bom.child_id]
+        if self_ids:
+            _self_q = (db.session.query(BomTable.parent_id, BomTable.bom_no, BomTable.version)
+                       .filter(BomTable.parent_id.in_(self_ids))
+                       .order_by(BomTable.parent_id, BomTable.id.desc()).all())
+            for _pid, _no, _ver in _self_q:
+                if _pid not in child_self_bom:
+                    child_self_bom[_pid] = {'bom_no': _no, 'version': _ver}
+
         for bom, child_name, child_spec in rows:
+            _ref = child_self_bom.get(bom.child_id) or {}
             children.append({
                 'child_id': bom.child_id,
                 'child_name': child_name or '[已删除物料]',
                 'child_spec': child_spec or '',
                 'dosage': float(bom.dosage) if bom.dosage else 0.0,
-                'remark': bom.remark or ''
+                'remark': bom.remark or '',
+                'child_bom_no': _ref.get('bom_no', ''),
+                'child_bom_version': _ref.get('version', '')
             })
 
         result = {