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Laravel使用Observer（觀察者）實現日志管理模塊

寫在前面：

這里實現日志管理寫了兩篇，第一篇是簡單的模型增刪改監聽并記錄日志。第二篇主要介紹的是通過導入文件進行批量數據處理無法很好的被監聽處理到，這一部分的數據處理邏輯如何被記錄下來。詳細請看Laravel日志管理記錄導入文件后的數據變化。

1、創建observer文件，我這里是要記錄倉庫庫存模塊的操作日志，所以執行下面的語句，會在app/Observers下面創建WarehouseInventoryObserver文件。

php artisan make:observer WarehouseInventoryObserver --model=WarehouseInventory

由于模型都是放在app/Models下面，所以要指定路徑。

php artisan make:observer WarehouseInventoryObserver --model=Models/WarehouseInventory

在App\Providers\AppServiceProvider下面開啟observer

public function boot()
{
    WarehouseInventory::observe(WarehouseInventoryObserver::class);
}

2、監聽該模塊下的增刪改操作，這里使用Repository當然也可以直接使用model。created、updated、deleted分別監聽WarehouseInventory模型的新增、更新和刪除的操作。

<?php
namespace App\Observers;

use App\Models\Warehouse;
use App\Models\WarehouseInventory;
use App\Repositories\ActionLogRepository;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\Auth;

class WarehouseInventoryObserver
{
    protected $user_id;
 
    protected $warehouse;
 
    protected $actionLogRepository;
 
    public function __construct(
        Warehouse $warehouse,
        ActionLogRepository $actionLogRepository
    )
    {
        $this->user_id = Auth::user() ? Auth::user()->id : null;
        $this->warehouse = $warehouse->pluck('name', 'id');
        $this->actionLogRepository = $actionLogRepository;
    }
 
    //創建
    public function created(WarehouseInventory $warehouseInventory)
    {
        if (!empty($this->user_id)) {
            $attributes = $warehouseInventory->getAttributes();
            $attributes = Arr::only($attributes, ['warehouse_id', 'seller_sku', 'quantity', 'box']);
            $warehouse = $this->warehouse->get($attributes['warehouse_id']);
            //拼接數據
            $data = [
                'module' => 'warehouse_inventory',
                'user_id' => $this->user_id,
                'type' => 'create',
                'content' => [
                    'warehouse' => $warehouse,
                    'seller_sku' => $attributes['seller_sku'],
                    'original_quantity' => 0,
                    'current_quantity' => $attributes['quantity'],
                    'box' => $attributes['box']
                ]
            ];
 
            $this->actionLogRepository->makeModel()->create($data);
        }
    }
 
    //更新
    public function updated(WarehouseInventory $warehouseInventory)
    {
        if (!empty($this->user_id)) {
            $original = $warehouseInventory->getOriginal();
            $dirty = $warehouseInventory->getDirty();
            $dirty = Arr::except($dirty, ['remark', 'updated_at']);
            if (count($dirty)) {
                if (Arr::has($dirty, 'warehouse_id')) {
                    $warehouse = $this->warehouse->get($dirty['warehouse_id']);
                } else {
                    $warehouse = $this->warehouse->get($original['warehouse_id']);
                }
                //拼接數據
                $data = [
                    'module' => 'warehouse_inventory',
                    'user_id' => $this->user_id,
                    'type' => 'update',
                    'content' => [
                        'warehouse' => $warehouse,
                        'seller_sku' => $original['seller_sku'],
                        'original_quantity' => $original['quantity'],
                        'current_quantity' => $dirty['quantity'],
                        'box' => (Arr::has($dirty, 'box')) ? $dirty['box'] : $original['box']
                    ]
                ];
 
                $this->actionLogRepository->makeModel()->create($data);
            }
        }
    }
 
    //刪除
    public function deleted(WarehouseInventory $warehouseInventory)
    {
        if (!empty($this->user_id)) {
 
            $original = $warehouseInventory->getOriginal();
            $warehouse = $this->warehouse->get($original['warehouse_id']);
            //拼接數據
            $data = [
                'module' => 'warehouse_inventory',
                'user_id' => $this->user_id,
                'type' => 'delete',
                'content' => [
                    'warehouse' => $warehouse,
                    'seller_sku' => $original['seller_sku'],
                    'original_quantity' => $original['quantity'],
                    'current_quantity' => 0,
                    'box' => $original['box']
                ]
            ];
 
            $this->actionLogRepository->makeModel()->create($data);
        }
    }
}

3、數據庫