改进append方法支持一对一关联的bind设置

library/think/Model.php

@@ -826,7 +826,27 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
                     $relation   = $this->getAttr($key);
                     $item[$key] = $relation->append([$attr])->toArray();
                 } else {
-                    $item[$name] = $this->getAttr($name);
+                    $relation = Loader::parseName($name, 1, false);
+                    if (method_exists($this, $relation)) {
+                        $modelRelation = $this->$relation();
+                        $value         = $this->getRelationData($modelRelation);
+
+                        if (method_exists($modelRelation, 'getBindAttr')) {
+                            $bindAttr = $modelRelation->getBindAttr();
+                            foreach ($bindAttr as $key => $attr) {
+                                $key = is_numeric($key) ? $attr : $key;
+                                if (isset($this->data[$key])) {
+                                    throw new Exception('bind attr has exists:' . $key);
+                                } else {
+                                    $item[$key] = $value ? $value->$attr : null;
+                                }
+                            }
+                        } else {
+                            $item[$name] = $value;
+                        }
+                    } else {
+                        $item[$name] = $this->getAttr($name);
+                    }
                 }
             }
         }

library/think/model/relation/BelongsTo.php

@@ -146,10 +146,10 @@ class BelongsTo extends OneToOne
                 if (!empty($this->bindAttr)) {
                     // 绑定关联属性
                     $this->bindAttr($relationModel, $result, $this->bindAttr);
+                } else {
+                    // 设置关联属性
+                    $result->setRelation($attr, $relationModel);
                 }
-
-                // 设置关联属性
-                $result->setRelation($attr, $relationModel);
             }
         }
     }
@@ -179,9 +179,10 @@ class BelongsTo extends OneToOne
         if (!empty($this->bindAttr)) {
             // 绑定关联属性
             $this->bindAttr($relationModel, $result, $this->bindAttr);
+        } else {
+            // 设置关联属性
+            $result->setRelation(Loader::parseName($relation), $relationModel);
         }
-        // 设置关联属性
-        $result->setRelation(Loader::parseName($relation), $relationModel);
     }
 
     /**

library/think/model/relation/HasOne.php

@@ -147,9 +147,10 @@ class HasOne extends OneToOne
                 if (!empty($this->bindAttr)) {
                     // 绑定关联属性
                     $this->bindAttr($relationModel, $result, $this->bindAttr);
+                } else {
+                    // 设置关联属性
+                    $result->setRelation($attr, $relationModel);
                 }
-                // 设置关联属性
-                $result->setRelation($attr, $relationModel);
             }
         }
     }
@@ -180,9 +181,9 @@ class HasOne extends OneToOne
         if (!empty($this->bindAttr)) {
             // 绑定关联属性
             $this->bindAttr($relationModel, $result, $this->bindAttr);
+        } else {
+            $result->setRelation(Loader::parseName($relation), $relationModel);
         }
-
-        $result->setRelation(Loader::parseName($relation), $relationModel);
     }
 
 }

library/think/model/relation/OneToOne.php

@@ -214,6 +214,16 @@ abstract class OneToOne extends Relation
         return $this;
     }
 
+    /**
+     * 获取绑定属性
+     * @access public
+     * @return array
+     */
+    public function getBindAttr()
+    {
+        return $this->bindAttr;
+    }
+
     /**
      * 关联统计
      * @access public