1、刀具物料搜索模型添加编码字段，添加自动计算编码方法；2、完善刀具物料搜索和功能刀具列表注册到cloud的接口；

sf_tool_management/models/maintenance_equipment.py

@@ -104,10 +104,11 @@ class StockLot(models.Model):
     def _compute_tool_material_status(self):
         for record in self:
             if record:
-                if record.quant_ids[-1].location_id.name == '刀具组装位置':
-                    record.tool_material_status = '在用'
-                else:
-                    record.tool_material_status = '可用'
+                if record.quant_ids:
+                    if record.quant_ids[-1].location_id.name == '刀具组装位置':
+                        record.tool_material_status = '在用'
+                    else:
+                        record.tool_material_status = '可用'
 
     @api.model
     def name_search(self, name='', args=None, operator='ilike', limit=100):