导入工料页调整和增加覆盖功能

app/service/material_list.js

@@ -673,7 +673,7 @@ module.exports = app => {
         }
 
         async cover() {
-            return await this.db.delete(this.ctx.service.materialList.tableName, { tid: this.ctx.tender.id, mid: this.ctx.material.id });
+            return await this.db.delete(this.ctx.service.materialList.tableName, { tid: this.ctx.tender.id, mid: this.ctx.material.id, is_self: 0 });
         }
 
         /**