Laravel 9拉拉关联多态关系书签

Question

我有这个Bookmark模型

public function bookmarkable()
{
    return $this->morphTo();
}

public function user()
{
    return $this->belongsTo(User::class);
}

在我的User模型中

public function bookmarks()
{
    return $this->hasMany(Bookmark::class);
}

public function posts()
{
    return $this->hasMany(Post::class);
}

和Post模型

public function bookmarks()
{
    return $this->morphMany(Bookmark::class, 'bookmarkable');
}

public function user()
{
    return $this->belongsTo(User::class);
}

我想要创建一个新的$bookmark，并将一个$post与那个书签相关联。

书签表有bookmarkable_type、bookmarkable_id和user_id列。

Answer 1

因为morphTo扩展了belongsTo

你可以这样用

$post = Post::first()// the post u want add to bookmark
$newBookmark = new Bookmark([]);
$newBookmark->name="lorem ipsum";
$newBookmark->bookmarkable()->associate($post);
$newBookmark->user()->associate($post->user);
$newBookmark->save();

参见类docs：https://laravel.com/api/9.x/Illuminate/Database/Eloquent/Relations/MorphTo.html