0

我尝试了文档中的示例。我有两个课程：

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

但是，没有与图书一起存储的作者。

>>> $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

它坏了，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() 方法更改作者仍然无效：

>>> $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",
       },
     },
   }

问候！

伯恩哈德

4

1 回答 1

0

我认为您的错误是在第一行之后：$author = new App\Author(['name'=>'John Doe'])，您没有保存。是的，您创建了一个新作者，但您没有保存它，所以当$book->author()->save($author)调用它时，会给出一个在数据库中没有 id 的对象，这就是它没有被保存的原因，

尝试运行这样的东西：

$author = new App\Author(['name'=>'John Doe']);
$author->save();
$book = new App\Book();
$book->autor_id = $author->id;
$book->save();

现在应该正确保存作者！

此外，这可行：$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。

于 2018-08-25T02:05:25.077 回答