Laravel Eloquent：如何在通过 toArray/toJson 序列化时自动获取关系
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Laravel Eloquent: How to automatically fetch relations when serializing through toArray/toJson
提问by Ronni Egeriis Persson
I figures this works for automatically fetching userand replieswhen I am serializing my object to JSON, but is overriding toArrayreally the proper way of doing this?
我认为这适用于自动获取user以及replies当我将对象序列化为 JSON 时，但重写真toArray的是这样做的正确方法吗？
<?php
class Post extends Eloquent
{
protected $table = 'posts';
protected $fillable = array('parent_post_id', 'user_id', 'subject', 'body');
public function user()
{
return $this->belongsTo('User');
}
public function replies()
{
return $this->hasMany('Post', 'parent_post_id', 'id');
}
public function toArray()
{
$this->load('user', 'replies');
return parent::toArray();
}
}
回答by Jake
Instead of overriding toArray()to load user and replies, use $with.
而不是覆盖toArray()加载用户和回复，使用$with.
Here's an example:
下面是一个例子：
<?php
class Post extends Eloquent
{
protected $table = 'posts';
protected $fillable = array('parent_post_id', 'user_id', 'subject', 'body');
protected $with = array('user', 'replies');
public function user()
{
return $this->belongsTo('User');
}
public function replies()
{
return $this->hasMany('Post', 'parent_post_id', 'id');
}
}
Also, you should be using toArray()in your controllers, not your models, like so:
此外，您应该toArray()在控制器中使用，而不是在模型中使用，如下所示：
Post::find($id)->toArray();
Hope this helps!
希望这可以帮助！
回答by PaybackTony
I must submit a new answer since I'm a SO pleb. A more proper way to accomplish this for those finding this on Google like I did would be to avoid using protected $withif you don't have to and instead move that with()call to your retrieval.
我必须提交一个新答案，因为我是一个普通人。对于像我一样在 Google 上发现此问题的人来说，完成此操作的更正确方法是避免使用（protected $with如果您不需要），而是将该with()调用移至您的检索。
<?php
class Post extends Eloquent
{
protected $table = 'posts';
protected $fillable = array('parent_post_id', 'user_id', 'subject', 'body');
public function user()
{
return $this->belongsTo('User');
}
public function replies()
{
return $this->hasMany('Post', 'parent_post_id', 'id');
}
}
And then you could modify the Post call to pre-load as needed:
然后您可以根据需要修改 Post 调用以进行预加载：
Post::with('user','replies')->find($id)->toArray();
This way, you won't be including un-needed data every time you grab a record, if you don't need it.
这样，如果不需要，每次抓取记录时都不会包含不需要的数据。
