php – Laravel – Eager加载多对多,只获取一条记录(不是一个集

我的帖子有图像(多对多,因为图像也可以有其他关系).在我的数据透视表中,我有一个名为’featured’的布尔字段,用于指定该帖子的主图像.我想在帖子索引页面中显示与当前用户关联的所有帖子.我只想从数据库中获取一个图像,这应该是特色图像.目前我只能将精选图像作为一个集合.这样做的原因是,如果用户有很多帖子我不想继续并检索所有帖子的特色图片(N 1),而是使用热切加载获得仅2个查询的特色图像.

Post Model
public function images() {
    return $this->belongsToMany(Image::class);
}

public function image(){
    return $this->images()->where('featured','=',true)->first();
}

public function featured_image(){
    return $this->images()->where('featured',true);
}


Controller

$user = Auth::user();

$posts = $user->posts()->with('image')->get();

// throws error
//Call to undefined method IlluminateDatabaseQueryBuilder::addEagerConstraints()


// if I do this
$posts = $user->posts()->with('featured_image')->get();

// I get all the user's posts,I get the featured image but as a collection even if I only have one record there

我怎样才能做到这一点？

$posts = $user->posts;
$idOfPosts = $posts->pluck('id');
$featuredImages = Image::whereIn('post_id',$idOfPosts)->where('featured',true)->get();