diff --git a/library/think/Model.php b/library/think/Model.php
index 8cd3259d..3b24b135 100644
--- a/library/think/Model.php
+++ b/library/think/Model.php
@@ -56,8 +56,6 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
     protected $pk;
     // 数据表字段信息 留空则自动获取
     protected $field = [];
-    // 关联属性
-    protected $relationAttr = [];
     // 只读字段
     protected $readonly = [];
     // 显示属性
@@ -349,20 +347,23 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
                 // 类型转换
                 $value = $this->writeTransform($value, $this->type[$name]);
             }
-
-            if ($this->isRelationAttr($name)) {
-                $isRelationData = true;
-            }
-
         }
 
         // 设置数据对象属性
-        if (isset($isRelationData)) {
-            $this->relation[$name] = $value;
-        } else {
-            $this->data[$name] = $value;
-        }
+        $this->data[$name] = $value;
+        return $this;
+    }
 
+    /**
+     * 设置关联数据对象值
+     * @access public
+     * @param string $name  属性名
+     * @param mixed  $value 属性值
+     * @return $this
+     */
+    public function setRelation($name, $value)
+    {
+        $this->relation[$name] = $value;
         return $this;
     }
 
@@ -519,8 +520,8 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
                 $value = $this->formatDateTime($value, $this->dateFormat);
             }
         } elseif ($notFound) {
-            $relation = $this->isRelationAttr($name);
-            if ($relation) {
+            $relation = Loader::parseName($name, 1, false);
+            if (method_exists($this, $relation)) {
                 $modelRelation = $this->$relation();
                 // 不存在该字段 获取关联数据
                 $value = $this->getRelationData($modelRelation);
@@ -1075,24 +1076,6 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
         return $data;
     }
 
-    /**
-     * 检查属性是否为关联属性 如果是则返回关联方法名
-     * @access public
-     * @param string $attr 关联属性名
-     * @return string|false
-     */
-    protected function isRelationAttr($attr)
-    {
-        $relation = Loader::parseName($attr, 1, false);
-
-        if (!empty($this->relationAttr) && in_array($attr, $this->relationAttr)) {
-            return $relation;
-        } elseif (method_exists($this, $relation)) {
-            return $relation;
-        }
-        return false;
-    }
-
     /**
      * 保存多个数据到当前数据对象
      * @access public
diff --git a/library/think/model/relation/BelongsTo.php b/library/think/model/relation/BelongsTo.php
index 9a308d23..905ea944 100644
--- a/library/think/model/relation/BelongsTo.php
+++ b/library/think/model/relation/BelongsTo.php
@@ -148,7 +148,7 @@ class BelongsTo extends OneToOne
                     $this->bindAttr($relationModel, $result, $this->bindAttr);
                 }
                 // 设置关联属性
-                $result->setAttr($attr, $relationModel);
+                $result->setRelation($attr, $relationModel);
             }
         }
     }
@@ -180,7 +180,7 @@ class BelongsTo extends OneToOne
             $this->bindAttr($relationModel, $result, $this->bindAttr);
         }
         // 设置关联属性
-        $result->setAttr(Loader::parseName($relation), $relationModel);
+        $result->setRelation(Loader::parseName($relation), $relationModel);
     }
 
     /**
@@ -197,7 +197,7 @@ class BelongsTo extends OneToOne
         $this->parent->setAttr($foreignKey, $model->$pk);
         $this->parent->save();
 
-        return $this->parent->setAttr($this->relation, $model);
+        return $this->parent->setRelation($this->relation, $model);
     }
 
     /**
@@ -212,6 +212,6 @@ class BelongsTo extends OneToOne
         $this->parent->setAttr($foreignKey, null);
         $this->parent->save();
 
-        return $this->parent->setAttr($this->relation, null);
+        return $this->parent->setRelation($this->relation, null);
     }
 }
diff --git a/library/think/model/relation/BelongsToMany.php b/library/think/model/relation/BelongsToMany.php
index 341e0a76..79684fe7 100644
--- a/library/think/model/relation/BelongsToMany.php
+++ b/library/think/model/relation/BelongsToMany.php
@@ -267,7 +267,7 @@ class BelongsToMany extends Relation
                     $data[$result->$pk] = [];
                 }
 
-                $result->setAttr($attr, $this->resultSetBuild($data[$result->$pk]));
+                $result->setRelation($attr, $this->resultSetBuild($data[$result->$pk]));
             }
         }
     }
@@ -293,7 +293,7 @@ class BelongsToMany extends Relation
             if (!isset($data[$pk])) {
                 $data[$pk] = [];
             }
-            $result->setAttr(Loader::parseName($relation), $this->resultSetBuild($data[$pk]));
+            $result->setRelation(Loader::parseName($relation), $this->resultSetBuild($data[$pk]));
         }
     }
 
diff --git a/library/think/model/relation/HasMany.php b/library/think/model/relation/HasMany.php
index 903293f0..9624fc67 100644
--- a/library/think/model/relation/HasMany.php
+++ b/library/think/model/relation/HasMany.php
@@ -95,7 +95,7 @@ class HasMany extends Relation
                     $relationModel->setParent(clone $result);
                 }
 
-                $result->setAttr($attr, $this->resultSetBuild($data[$result->$localKey]));
+                $result->setRelation($attr, $this->resultSetBuild($data[$result->$localKey]));
             }
         }
     }
@@ -124,7 +124,7 @@ class HasMany extends Relation
                 $relationModel->setParent(clone $result);
             }
 
-            $result->setAttr(Loader::parseName($relation), $this->resultSetBuild($data[$result->$localKey]));
+            $result->setRelation(Loader::parseName($relation), $this->resultSetBuild($data[$result->$localKey]));
         }
     }
 
diff --git a/library/think/model/relation/HasOne.php b/library/think/model/relation/HasOne.php
index e5a557a0..c500c02a 100644
--- a/library/think/model/relation/HasOne.php
+++ b/library/think/model/relation/HasOne.php
@@ -146,7 +146,7 @@ class HasOne extends OneToOne
                     }
                 }
                 // 设置关联属性
-                $result->setAttr($attr, $relationModel);
+                $result->setRelation($attr, $relationModel);
             }
         }
     }
@@ -179,7 +179,7 @@ class HasOne extends OneToOne
             }
         }
 
-        $result->setAttr(Loader::parseName($relation), $relationModel);
+        $result->setRelation(Loader::parseName($relation), $relationModel);
     }
 
 }
diff --git a/library/think/model/relation/MorphMany.php b/library/think/model/relation/MorphMany.php
index a4a2f500..87c2d66c 100644
--- a/library/think/model/relation/MorphMany.php
+++ b/library/think/model/relation/MorphMany.php
@@ -129,7 +129,7 @@ class MorphMany extends Relation
                     $relationModel->setParent(clone $result);
                     $relationModel->isUpdate(true);
                 }
-                $result->setAttr($attr, $this->resultSetBuild($data[$result->$pk]));
+                $result->setRelation($attr, $this->resultSetBuild($data[$result->$pk]));
             }
         }
     }
@@ -161,7 +161,7 @@ class MorphMany extends Relation
                 $relationModel->isUpdate(true);
             }
 
-            $result->setAttr(Loader::parseName($relation), $this->resultSetBuild($data[$result->$pk]));
+            $result->setRelation(Loader::parseName($relation), $this->resultSetBuild($data[$result->$pk]));
         }
     }
 
diff --git a/library/think/model/relation/MorphOne.php b/library/think/model/relation/MorphOne.php
index f8124ee3..4dfd1c0f 100644
--- a/library/think/model/relation/MorphOne.php
+++ b/library/think/model/relation/MorphOne.php
@@ -129,7 +129,7 @@ class MorphOne extends Relation
                     $relationModel->isUpdate(true);
                 }
 
-                $result->setAttr($attr, $relationModel);
+                $result->setRelation($attr, $relationModel);
             }
         }
     }
@@ -161,7 +161,7 @@ class MorphOne extends Relation
                 $relationModel = null;
             }
 
-            $result->setAttr(Loader::parseName($relation), $relationModel);
+            $result->setRelation(Loader::parseName($relation), $relationModel);
         }
     }
 
diff --git a/library/think/model/relation/MorphTo.php b/library/think/model/relation/MorphTo.php
index 7dc22652..df104a90 100644
--- a/library/think/model/relation/MorphTo.php
+++ b/library/think/model/relation/MorphTo.php
@@ -177,7 +177,7 @@ class MorphTo extends Relation
                             $relationModel->setParent(clone $result);
                             $relationModel->isUpdate(true);
 
-                            $result->setAttr($attr, $relationModel);
+                            $result->setRelation($attr, $relationModel);
                         }
                     }
                 }
@@ -232,7 +232,7 @@ class MorphTo extends Relation
             $data->setParent(clone $result);
             $data->isUpdate(true);
         }
-        $result->setAttr(Loader::parseName($relation), $data ?: null);
+        $result->setRelation(Loader::parseName($relation), $data ?: null);
     }
 
     /**
@@ -251,7 +251,7 @@ class MorphTo extends Relation
         $this->parent->setAttr($morphType, get_class($model));
         $this->parent->save();
 
-        return $this->parent->setAttr($this->relation, $model);
+        return $this->parent->setRelation($this->relation, $model);
     }
 
     /**
@@ -268,7 +268,7 @@ class MorphTo extends Relation
         $this->parent->setAttr($morphType, null);
         $this->parent->save();
 
-        return $this->parent->setAttr($this->relation, null);
+        return $this->parent->setRelation($this->relation, null);
     }
 
     /**
@@ -277,6 +277,5 @@ class MorphTo extends Relation
      * @return void
      */
     protected function baseQuery()
-    {
-    }
+    {}
 }
diff --git a/library/think/model/relation/OneToOne.php b/library/think/model/relation/OneToOne.php
index 4368618e..ff066ed3 100644
--- a/library/think/model/relation/OneToOne.php
+++ b/library/think/model/relation/OneToOne.php
@@ -257,7 +257,7 @@ abstract class OneToOne extends Relation
         } else {
             $relationModel = null;
         }
-        $result->setAttr(Loader::parseName($relation), $relationModel);
+        $result->setRelation(Loader::parseName($relation), $relationModel);
     }
 
     /**
@@ -317,6 +317,5 @@ abstract class OneToOne extends Relation
      * @return void
      */
     protected function baseQuery()
-    {
-    }
+    {}
 }