php - Laravel 5，记录模型创建、更新、删除事件

Question

我正在开发 Laravel 5 应用程序。我想在其中使用所有新的或更改的(如果正在更新模型)模型字段记录模型创建、更新和删除事件。我想要简单的可重用解决方案，而无需编写太多代码。

Answer 1

当然，您可以创建如下特征并将其用于您要记录的所有模型。

<?php

namespace App\Traits;

use App\Activity;
use Illuminate\Database\Eloquent\Model;

/**
 * Class ModelEventLogger
 * @package App\Traits
 *
 *  Automatically Log Add, Update, Delete events of Model.
 */
trait ModelEventLogger {

    /**
     * Automatically boot with Model, and register Events handler.
     */
    protected static function bootModelEventLogger()
    {
        foreach (static::getRecordActivityEvents() as $eventName) {
            static::$eventName(function (Model $model) use ($eventName) {
                try {
                    $reflect = new \ReflectionClass($model);
                    return Activity::create([
                        'user_id'     => \Auth::user()->id,
                        'contentId'   => $model->id,
                        'contentType' => get_class($model),
                        'action'      => static::getActionName($eventName),
                        'description' => ucfirst($eventName) . " a " . $reflect->getShortName(),
                        'details'     => json_encode($model->getDirty())
                    ]);
                } catch (\Exception $e) {
                    return true;
                }
            });
        }
    }

    /**
     * Set the default events to be recorded if the $recordEvents
     * property does not exist on the model.
     *
     * @return array
     */
    protected static function getRecordActivityEvents()
    {
        if (isset(static::$recordEvents)) {
            return static::$recordEvents;
        }

        return [
            'created',
            'updated',
            'deleted',
        ];
    }

    /**
     * Return Suitable action name for Supplied Event
     *
     * @param $event
     * @return string
     */
    protected static function getActionName($event)
    {
        switch (strtolower($event)) {
            case 'created':
                return 'create';
                break;
            case 'updated':
                return 'update';
                break;
            case 'deleted':
                return 'delete';
                break;
            default:
                return 'unknown';
        }
    }
} 

现在您可以在任何要为其抛出事件的模型中使用此特征。在您的文章模型中。

<?php namespace App;

use App\Traits\ModelEventLogger;
use Illuminate\Database\Eloquent\Model;

class Test extends Model {

    use ModelEventLogger;

    //Just in case you want specific events to be fired for Article model
    //uncomment following line of code

   // protected static $recordEvents = ['created'];

}

当然，您必须创建“事件”模型和包含相关列的相关表。我希望这会有所帮助。