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Laravel 4 初级教程之Pages、表单验证

Jun 06, 2016 pm 08:18 PM
laravel pages form validation

本篇教程是本系列的完结篇,要做的是Pages的详细管理功能,表单验证以及命名空间的深度使用,和一个更好用的通知组件,并且布置一个简单的大作业。

1. 构建Pages管理功能

运行命令:

php artisan generate:controller admin/PagesController

修改PagesController.php 内容:

namespace App\Controllers\Admin;
use Page;
use Input, Notification, Redirect, Sentry, Str;
use App\Services\Validators\PageValidator;
class PagesController extends \BaseController {
    public function index()
    {
        return \View::make('admin.pages.index')->with('pages', Page::all());
    }
    public function show($id)
    {
        return \View::make('admin.pages.show')->with('page', Page::find($id))->withAuthor(Sentry::findUserById(Page::find($id)->user_id)->name);
    }
    public function create()
    {
        return \View::make('admin.pages.create');
    }
    public function store()
    {
        $validation = new PageValidator;
        if ($validation->passes())
        {
      $page          = new Page;
      $page->title   = Input::get('title');
      $page->body    = Input::get('body');
      $page->user_id = Sentry::getUser()->id;
            $page->save();
            Notification::success('新增页面成功!');
            return Redirect::route('admin.pages.edit', $page->id);
        }
        return Redirect::back()->withInput()->withErrors($validation->errors);
    }
    public function edit($id)
    {
        return \View::make('admin.pages.edit')->with('page', Page::find($id));
    }
    public function update($id)
    {
        $validation = new PageValidator;
        if ($validation->passes())
        {
      $page          = Page::find($id);
      $page->title   = Input::get('title');
      $page->body    = Input::get('body');
      $page->user_id = Sentry::getUser()->id;
            $page->save();
            Notification::success('更新页面成功!');
            return Redirect::route('admin.pages.edit', $page->id);
        }
        return Redirect::back()->withInput()->withErrors($validation->errors);
    }
    public function destroy($id)
    {
        $page = Page::find($id);
        $page->delete();
        Notification::success('删除成功!');
        return Redirect::route('admin.pages.index');
    }
}

然后,打开:8000/admin 页面,用之前 seed 进去的账号密码登录,我们会得到一个错误:

Class App\Controllers\Admin\PagesController does not exist

这个文件明明已经有了啊,为什么Laravel报错说没有呢?!原因在第二篇教程里,我在这里直接说了吧。因为这个类不在顶级命名空间下,而我们没有告诉Laravel我们已经新添了一个子命名空间下的类。我们现在来告诉它:

composer dump-autoload

OK,刷新,我们又会得到以下错误:

View [admin.pages.index] not found.

这时候,把我的视图中的整个pages文件夹复制过去吧。

刷新。你会得到以下错误:

Class 'Notification' not found

这是因为我们还没有装这个composer包,edvinaskrucas/notification,请自行安装3.0.1 版(4是为 Laravel 5 准备的),这是第三个小作业。一定要放在 require 里面,require-dev 里面的包只在开发的时候使用。

这里的Notification 就是那个更好用的通知组件。

这个包装好以后,运行:

composer dump-autoload

然后在 config/app.php 里面恰当的位置分别增加下面两行:

'Krucas\Notification\NotificationServiceProvider'
'Notification' => 'Krucas\Notification\Facades\Notification'

恰当的位置很多人不理解,导致很多人出现了错误,解决方式也很简单:请直接参考我的示例代码:https://github.com/johnlui/Learn-Laravel-4/blob/master/app/config/app.php

刷新,如果你看到以下界面:


恭喜你~ Pages的管理页面完成了!

2. 表单验证

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