Laravel Database
1.DB連線設定
2.建立Model(對應實體table)
3.Model的專案分層(Service-->Repository)
4.Repository的CRUD
#名詞說明
Service =Business Logical Layer
Reposiotry =Data Access Layer
- DB連線設定
設定mysql帳號密碼, 修改.env
DB_CONNECTION=mysql
DB_HOST=localhost
DB_PORT=3306
DB_DATABASE=testDB
DB_USERNAME=testID
DB_PASSWORD=testPassword
使用php artisan make:model 自動產生Model檔案
php artisan make:model blog\\Model\\Member
- 產生 app/blog/Model/Member.php
<?php
namespace App\blog\Model;
use Illuminate\Database\Eloquent\Model;
class Member extends Model
{
//手動指定table:,預設無此變數
protected $table = 'member';
//可被指定的屬性
protected $fillable = array('username', 'nickname', 'email');
//$fillable相反:不可被指定的屬性
protected $guarded = array('userID', 'password');
}
- Model的專案分層
Controller ->Model {{
BusinessLogicLayer(Service)->DataAccessLayer(Repository) -->DB
}}
不管專案大小,資料庫的CRUD 建議放在DA層
優點:
1.底層的資料存取可更換且不影響上層View/Controller/Service
有效的強調了,Repository的主要工作
2.Service 業務邏輯封裝了所需的外部資源 (File,外部Servie, Other DB Source..)
有效強調了"業務邏輯" 這個層次的 主要工作,並封裝底層實做
3.Service 與 Repository間的傳遞
- 統一傳遞物件:Class
- 宣告Class繼承Eloquent\Model
Active Record 功能
e.g: product::All()
$product::where('id',3)
Controll Sample:home.php
主要呼叫Service, 並將資料,以陣列的格式 傳送給view
View('index', [$bannerHomeTop: $bannerTop , $bannerHomeProducts:$bannerProducts] );
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use App\blog\Service\BannerService;
class home extends Controller
{
protected $bannerService;
public function __construct(){
$this->bannerService=new BannerService();
}
public function index()
{
$bannersHomeTop=$this->bannerService->getBannerHomeTop();
$bannersHomeProducts=$this->bannerService->getBannerHomeProducts();
$data['bannersHomeTop']=$bannersHomeTop;
$data['bannersHomeProducts']=$bannersHomeProducts;
return view('index',$data);
}
}
View: /resources/views/index.blade.php
<html>
@foreach ($bannerHomeTop as $banner)
<a href="{{banner->url}}" target="_blank" >
<img src="{{banner->img}}">
</a>
@endforeach
</html>
Service : BannerSerivce.php
<?php
namespace App\lytbirdsnest\Service;
use App\lytbirdsnest\Repository\BannerRepository;
class BannerService
{
protected $bannerRepository; //data access layer
public function __construct()
{
$this->bannerRepository =new BannerRepository();
}
public function getBannerHomeTop(){
$bannersTop=$this->bannerRepository->getBannerByDataType('首頁_上');
return $bannersTop;
}
}
- Repository 的CRUD
Repository: BannerRepository
將$this->banner宣告為Model\Banner
可直接操作CRUD:
Create $banner->save();
Read:$this->banner->get();
Update:$banner->save();
Delete:$banner->forcedelete();
<?php
namespace App\blog\Repository;
use Illuminate\Database\Eloquent\Collection;
use App\blog\Model\Banner;
class BannerRepository
{
protected $banner;
public function __construct()
{
$this->banner=new Banner();
}
//Create
public function Create(Banner $banner)
{
$banner->save();
}
//Read
public function getBannerByDataType($dataType)
{
//查詢
return $this->banner
->where('data_type','=',$dataType)
->where('status','=','Y')
->where('start_date','<=',date)
->where('end_date','>=',date)
->orderBy('sn','desc')
->get();
}
//Update
public function Update(Banner $banner)
{
$bannerToUpdate=$this->banner->find($banner->id);
$bannerToUpdate->UpdateDate=date();
$bannerToUpdate->UpdateUser='sys';
//修改
$banner->save();
}
//Delete
public function Delete(Banner $banner)
{
$bannerToDelete=$this->banner->find($banner->id);
//強迫刪除
$bannerToDelete->forceDelete();
}
}
