Laravel追随者/以下关系 [英] Laravel follower/following relationships

问题描述

我试图在laravel中创建一个简单的关注者/关注者系统，没什么特别的，只需单击一个按钮即可关注或取消关注，并显示关注者或关注您的人.

I am trying to make a simple follower/following system in laravel, nothing special, just click a button to follow or unfollow, and display the followers or the people following you.

我的麻烦是我不知道如何在模型之间建立关系.

My trouble is I can't figure out how to make the relationships between the models.

这些是迁移:

-用户迁移:

Schema::create('users', function (Blueprint $table) {
        $table->increments('id');
        $table->timestamps();
        $table->string('email');
        $table->string('first_name');
        $table->string('last_name');
        $table->string('password');
        $table->string('gender');
        $table->date('dob');
        $table->rememberToken();
    });

-跟随迁移:

Schema::create('followers', function (Blueprint $table) {

        $table->increments('id');
        $table->integer('follower_id')->unsigned();
        $table->integer('following_id')->unsigned();
        $table->timestamps();        
    });
}

这是模型:

-用户模型:

   class User extends Model implements Authenticatable
{
    use \Illuminate\Auth\Authenticatable;
    public function posts()
    {
        return $this->hasMany('App\Post');
    }

    public function followers()
    {
        return $this->hasMany('App\Followers');
    }

}

-跟随者模型基本上是空的，这就是我被困住的地方

-And the followers model is basically empty, this is where I got stuck

我尝试过这样的事情:

class Followers extends Model
{
    public function user()
    {
        return $this->belongsTo('App\User');
    }
}

但是没有用.

此外，我想问一下您能否告诉我如何编写关注"和显示关注者/关注"功能.我已经阅读了所有可以找到但没有用的教程.我似乎听不懂.

Also, I'd like to ask if you could tell me how to write the "follow" and "display followers/following" functions. I've read every tutorial I could find but to no use. I can't seem to understand.

推荐答案

您需要意识到跟随者"也是App\User.因此，您只需要使用以下两种方法的一个模型App\User:

You need to realize that the "follower" is also a App\User. So you only need one model App\User with these two methods:

// users that are followed by this user
public function following() {
    return $this->belongsToMany(User::class, 'followers', 'follower_id', 'following_id');
}

// users that follow this user
public function followers() {
    return $this->belongsToMany(User::class, 'followers', 'following_id', 'follower_id');
}

---

用户$a要关注用户$b:

---

User $a wants to follow user $b:

$a->following()->attach($b);

用户$a想要停止关注用户$b:

User $a wants to stop following user $b:

$a->following()->detach($b);

---

获取用户$a的所有关注者:

---

Get all followers of user $a:

$a_followers = $a->followers()->get();

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