在laravel中搜索2个模型

// User.php
public function profile()
{
    return $this->hasOne(Profile::class);
}

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

// Article.php
public function comments()
{
    return $this->hasMany(Comment::class);
}

// Comment.php
public function article()
{
    return $this->belongsTo(Article::class);
}

// Student.php
public function courses()
{
    return $this->belongsToMany(Course::class);
}

// Course.php
public function students()
{
    return $this->belongsToMany(Student::class);
}

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

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

$tag = 'Laravel';

$usersWithPosts = User::with(['posts' => function ($query) use ($tag) {
    $query->where('tag', $tag);
}])->get();