如何使moloquent的embedsOne关系工作？
如何使moloquent的embedsOne关系工作？
提问于 2018-08-25 07:24:15
我尝试了文档中的示例。我有两节课：
namespace App;
use Moloquent\Eloquent\Model as Eloquent;
class Author extends Eloquent
{
protected $fillable = [ 'name' ];
}
class Book extends Eloquent
{
public function author()
{
return $this->embedsOne(Author::class);
}
}在修补程序会话中，我创建了一个作者和一本书，并尝试保存链接：
>>> $author = new App\Author(['name'=>'John Doe']);
=> App\Author {#2284
name: "John Doe",
}
>>> $book = new App\Book();
=> App\Book {#2277}
>>> $book->author()->save($author);
=> App\Author {#2284
name: "John Doe",
updated_at: MongoDB\BSON\UTCDateTime {#2296
+"milliseconds": "1534969446023",
},
created_at: MongoDB\BSON\UTCDateTime {#2296},
_id: MongoDB\BSON\ObjectId {#2298
+"oid": "5b7dc6662dab0d03621a1c82",
},
}
>>> $book->save();
=> true然而，这本书中并没有存储作者。
>>> $book
=> App\Book {#2277
updated_at: MongoDB\BSON\UTCDateTime {#2268
+"milliseconds": "1534969455111",
},
created_at: MongoDB\BSON\UTCDateTime {#2268},
_id: MongoDB\BSON\ObjectId {#2294
+"oid": "5b7dc66f2dab0d03621a1c83",
},
}
>>> $book->author
=> null是坏了，还是我做错了？当我使用create()方法时，我得到了一个干净的结果：
>>> $book->author()->create(['name'=>'Jane Doe']);
=> App\Author {#2302
name: "Jane Doe",
updated_at: MongoDB\BSON\UTCDateTime {#2308
+"milliseconds": "1534970275755",
},
created_at: MongoDB\BSON\UTCDateTime {#2308},
_id: MongoDB\BSON\ObjectId {#2317
+"oid": "5b7dc9a32dab0d03621a1c84",
},
}
>>> $book
=> App\Book {#2277
updated_at: MongoDB\BSON\UTCDateTime {#2268
+"milliseconds": "1534969455111",
},
created_at: MongoDB\BSON\UTCDateTime {#2268},
_id: MongoDB\BSON\ObjectId {#2294
+"oid": "5b7dc66f2dab0d03621a1c83",
},
author: App\Author {#2310
name: "Jane Doe",
updated_at: MongoDB\BSON\UTCDateTime {#2308
+"milliseconds": "1534970275755",
},
created_at: MongoDB\BSON\UTCDateTime {#2308},
_id: MongoDB\BSON\ObjectId {#2309
+"oid": "5b7dc9a32dab0d03621a1c84",
},
},
}尝试使用save()方法更改作者仍然不起作用：
>>> $book->author()->save(App\Author::first())
=> App\Author {#2352
_id: MongoDB\BSON\ObjectId {#2342
+"oid": "5b7dcdfd2dab0d03621a1c85",
},
name: "Your Name",
updated_at: MongoDB\BSON\UTCDateTime {#2346
+"milliseconds": "1534971389628",
},
created_at: MongoDB\BSON\UTCDateTime {#2347
+"milliseconds": "1534971389628",
},
}
>>> $book
=> App\Book {#2277
updated_at: MongoDB\BSON\UTCDateTime {#2292
+"milliseconds": "1534970479148",
},
created_at: MongoDB\BSON\UTCDateTime {#2268
+"milliseconds": "1534969455111",
},
_id: MongoDB\BSON\ObjectId {#2294
+"oid": "5b7dc66f2dab0d03621a1c83",
},
author: App\Author {#2310
name: "Jane Doe",
updated_at: MongoDB\BSON\UTCDateTime {#2308
+"milliseconds": "1534970275755",
},
created_at: MongoDB\BSON\UTCDateTime {#2308},
_id: MongoDB\BSON\ObjectId {#2309
+"oid": "5b7dc9a32dab0d03621a1c84",
},
},
}欢迎光临！
伯恩哈德
回答 1
Stack Overflow用户
发布于 2018-08-25 10:05:25
我认为您的错误是在第一行之后：$author = new App\Author(['name'=>'John Doe'])，您没有保存。是的，你创建了一个新的作者，但是你没有保存它，所以当调用$book->author()->save($author)时，会给出一个数据库中没有id的对象，这就是为什么它不会被保存的原因。
试着运行下面这样的代码：
$author = new App\Author(['name'=>'John Doe']);
$author->save();
$book = new App\Book();
$book->autor_id = $author->id;
$book->save();现在应该可以正确地保存作者了！
同样，这也是可行的：$book->author()->create(['name'=>'Jane Doe']);，因为create方法在后台保存，传递数据库上的现有对象。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/52012790
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