diff --git a/library/think/model/Relation.php b/library/think/model/Relation.php
index 8797cca4..b16d08e4 100644
--- a/library/think/model/Relation.php
+++ b/library/think/model/Relation.php
@@ -21,14 +21,12 @@ abstract class Relation
     protected $parent;
     /** @var  Model 当前关联的模型类 */
     protected $model;
+    // 关联模型查询对象
+    protected $query;
     // 关联表外键
     protected $foreignKey;
     // 关联表主键
     protected $localKey;
-    // 当前关联的JOIN类型
-    protected $joinType;
-    // 关联模型查询对象
-    protected $query;
     // 关联查询条件
     protected $where;
     // 关联查询参数
diff --git a/library/think/model/relation/OneToOne.php b/library/think/model/relation/OneToOne.php
index 549a389a..ea16b92b 100644
--- a/library/think/model/relation/OneToOne.php
+++ b/library/think/model/relation/OneToOne.php
@@ -21,6 +21,8 @@ abstract class OneToOne extends Relation
 {
     // 预载入方式
     protected $eagerlyType = 0;
+    // 当前关联的JOIN类型
+    protected $joinType;
     // 要绑定的属性
     protected $bindAttr = [];