参考Laravel

Question

刚刚在Laravel（5.4）完成了我的“朋友”系统，我正在研究一个项目。我称之为“连接”。一切都很好，我现在正试图清理一切。

从一开始，按照教程和SO答案，我将每个方法都放在我的User模型中（不是 错误：连接与用户相关）。但我想清理并将与我的连接相关的所有内容放入名为Connection的模型中。

1. User模型是否应该处理与连接相关的所有内容，或者我的清洁愿望是否合理且Connection模型是否合法？
2. 如何实现以下代码？如何引用User现在我不再在课堂上了$this变得毫无意义？

连接模型

namespace App;

use Illuminate\Support\Facades\Auth;
use Illuminate\Foundation\Auth\User as Authenticatable;

class Connection extends Authenticatable
{
    const PENDING = 0;
    const ACCEPTED = 1;
    const REJECTED = 2;
}

用户模型

namespace App;

use Illuminate\Support\Facades\Auth;
use Illuminate\Foundation\Auth\User as Authenticatable;

class User extends Authenticatable
{

    // Get connections the user initiated by himself
    public function connectionsOfOwner() {
        return $this->belongsToMany(User::class, 'connections', 'user_id', 'connection_id')->withPivot('status');
    }

    // Get connections the user has been invited to
    public function connectionsOf() {
        return $this->belongsToMany(User::class, 'connections', 'connection_id', 'user_id')->withPivot('status');
    }

    // Accessor allowing to call $this->connections
    public function getConnectionsAttribute() {
        if (!array_key_exists('connections', $this->relations)) {
            $this->loadConnections();
        }

        return $this->getRelation('connections');
    }

    // Check if a Laravel relation named "connection" exists
    protected function loadConnections() {
        if (!array_key_exists('connections', $this->relations)) {
            $this->setRelation('connections', $this->mergeConnections());
        }
    }

    // Merge "connectionsOfOwner" and "connectionsOf"
    protected function mergeConnections() {
        return $this->connectionsOfOwner->merge($this->connectionsOf);
    }

    // Get pending connections
    public function getPendingConnections() {
        $filtered = $this->connections->filter(function ($value, $key) {
            if ($value->pivot->status == 0) {
                return $value;
            }
        });

        return $filtered;
    }

    // Get accepted connections
    public function getAcceptedConnections() {
        $filtered = $this->connections->filter(function ($value, $key) {
            if ($value->pivot->status == 1) {
                return $value;
            }
        });

        return $filtered;
    }

    // Add a connection
    public function addConnection($user) {
        $this->connectionsOfOwner()->attach($user->id);
    }

    // Accept a connection
    public function acceptConnection($user) {
        $this->connectionsOf()->syncWithoutDetaching([$user->id => ['status' => Connection::ACCEPTED]]);
        $this->connectionsOfOwner()->attach($user->id, ['status' => Connection::ACCEPTED]);
    }

    // Remove a connection
    public function removeConnection($user) {
        $this->connectionsOfOwner()->detach($user->id);
        $this->connectionsOf()->detach($user->id);
    }

}

Answer 1

可能您可以跳过连接模型并将该功能保存在用户模型中使用的特征“HasConnections”中。

Jeffrey Way在Laracon2017中简要介绍了这种方法：https://streamacon.com/video/laracon-us-2017/day-2-jeffrey-way

祝你好运！