Question

在我的模型中，我有：

//UserAddress.php

protected $with = ['address'];

public function address()
{
    return $this->morphOne('App\Address', 'addressable');
}

//User.php
public function userAddress()
{
    return $this->hasOne(UserAddress::class);
}

//Address.php
public function addressable() 
{
    return $this->morphTo();
}

但是当我打电话给dd(auth()->user()->userAddress))时，地址真实性未加载。它仍然为空。

#attributes: array:4 [
    "id" => "1"
    "user_id" => "1"
    "created_at" => "2018-11-13 10:11:54"
    "updated_at" => "2018-11-13 10:11:54"
  ]
  #original: array:4 [
    "id" => "1"
    "user_id" => "1"
    "created_at" => "2018-11-13 10:11:54"
    "updated_at" => "2018-11-13 10:11:54"
  ]
  #changes: []
  #casts: []
  #dates: []
  #dateFormat: null
  #appends: []
  #dispatchesEvents: []
  #observables: []
  #relations: array:1 [
    "address" => null
  ]
  #touches: []
  +timestamps: true

但是，对于dd(auth()->user()->userAddress()->get()))，关系是渴望加载的。

出什么问题了？

修改

这太奇怪了。如果我写auth()->user()->userAddress->address，我将得到null（不应该那样）。而当我移除protected $with = ['address']; auth()->user()->userAddress->address后，我便得到了正确的模型。

Answer 1

我在ID字段是字符串的一对一关系中也遇到了同样的问题。一切正常，直到我急于加载连接表（您的情况下为user_address）。

在我的情况下，我忘记了在连接表中定义public $incrementing = false;，并且一旦添加了它，一切都会起作用。

Laravel渴望加载的多态关系为空

1 个答案: