修复bug

example/app/category.go

@@ -15,16 +15,16 @@ var categoryCtr = Ctr{
 
 			for _, v := range childData1 {
 				data := that.Db.Get("category", "*", Map{"parent_id": v.GetCeilInt("id")})
+				if data != nil {
 					childData = append(childData, data)
 				}
 
+			}
 
 		} else {
 			childData = that.Db.Select("category", "*", Map{"parent_id": parentId})
 		}
 
-
-
 		for _, v := range childData {
 			v["child"] = that.Db.Select("category", "*", Map{"parent_id": v.GetCeilInt("id")})
 		}