这篇文章主要介绍了Laravel 5 框架入门的第二篇文章,给大家讲解的是构建 Pages 的管理功能,十分的详细,有需要的小伙伴可以参考下。
我们将改变学习路线,不再像 Laravel 4 教程那样先构建登录系统。在本篇教程中,我们将一起构建 Pages 的管理功能,尝试 Laravel 的路由和 PHP 的命名空间。
1. 路由
Laravel 中的路由,跟其他 PHP 框架一样,作用是把各种请求分流到各个控制器。
在 `learnlaravel5/app/Http/routes.php` 的末尾添加以下代码:
复制代码 代码如下:
Route::group(['prefix' => 'admin', 'namespace' => 'Admin'], function()
{
Route::get('http://www.jb51.net/', 'AdminHomeController@index');
});
这表示创建了一个路由组。
1. `'prefix' => 'admin'` 表示这个路由组的 url 前缀是 /admin,也就是说中间那一行代码 `Route::get('http://www.jb51.net/'` 对应的链接不是 :88/ 而是 :88/admin ,如果这段代码是 `Route::get('fuck'` 的话,那么 URL 就应该是 :88/admin/fuck 。
2. `'namespace' => 'Admin'` 表示下面的 `AdminHomeController@index` 不是在 `\App\Http\Controllers\AdminHomeController@index` 而是在 `\App\Http\Controllers\Admin\AdminHomeController@index`,加上了一个命名空间的前缀。
如果你用过 Laravel 4,会发现 Laravel 5 的命名空间规划比较怪异,这其实是一个非常大的进步。Laravel 4 其实已经全面引入了命名空间这个强大的特性,但是为了“降低学习成本”,把 路由、控制器、模型 的默认命名空间全部设置成了顶级命名空间,这个举动反而让很多人比较轻易地“上手”了 Laravel,但是在用了一段时间以后,还需要翻越一堵高墙,那就是命名空间,,而且有了前面的“容易上手”的印象作为铺垫,后期的学习会更加困难。Laravel 5 把命名空间全部隔开,控制器在 `\App\Http\Controllers`,模型在 `\App`,让我们在刚上手的时候就体验命名空间分离的感觉,总体上其实是会降低学习成本的。
2. 控制器
我们可以使用 Artisan 非常方便地构建控制器:
复制代码 代码如下:
php artisan make:controller Admin/AdminHomeController
得到 `learnlaravel5/app/Http/Controllers/Admin/AdminHomeController.php` 文件。
在 `class AdminHomeController extends Controller {` 上面增加一行:
复制代码 代码如下:
use App\Page;
修改 index() 的代码如下:
复制代码 代码如下:
public function index()
{
return view('AdminHome')->withPages(Page::all());
}
控制器中文文档:
控制器中涉及到了许多的命名空间知识,可以参考 PHP 命名空间 解惑。
3. 视图
新建 `learnlaravel5/resources/views/AdminHome.blade.php`:
@extends('app') @section('content')
@endsection视图的基本用法在此不再赘述,请阅读中文文档:
访问 :88/admin 得到如下页面:
至此,包含 路由 》 控制器 》 模型 》 视图 的整个流程都已经完成。
4. 完成 Pages 管理功能
接下来,我将记录下我实现 Pages 管理功能的过程,不再做过多的阐述。大家有问题可以直接在本文下面留言,我会及时回复。
4.1 修改路由 learnlaravel5/app/Http/routes.php
复制代码 代码如下:
Route::group(['prefix' => 'admin', 'namespace' => 'Admin'], function()
{
Route::get('http://www.jb51.net/', 'AdminHomeController@index');
Route::resource('pages', 'PagesController');
});
此处增加了一条“资源控制器”,中文文档地址:
4.2 创建 learnlaravel5/app/Http/Controllers/Admin/PagesController.php
运行:
复制代码 代码如下:
php artisan make:controller Admin/PagesController
4.3 修改 learnlaravel5/app/Http/Controllers/Admin/PagesController.php 为:
validate($request, [ 'title' => 'required|unique:pages|max:255', 'body' => 'required', ]); $page = new Page; $page->title = Input::get('title'); $page->body = Input::get('body'); $page->user_id = 1;//Auth::user()->id; if ($page->save()) { return Redirect::to('admin'); } else { return Redirect::back()->withInput()->withErrors('保存失败!'); } } /** * Show the form for editing the specified resource. * * @param int $id * @return Response */ public function edit($id) { return view('admin.pages.edit')->withPage(Page::find($id)); } /** * Update the specified resource in storage. * * @param int $id * @return Response */ public function update(Request $request,$id) { $this->validate($request, [ 'title' => 'required|unique:pages,title,'.$id.'|max:255', 'body' => 'required', ]); $page = Page::find($id); $page->title = Input::get('title'); $page->body = Input::get('body'); $page->user_id = 1;//Auth::user()->id; if ($page->save()) { return Redirect::to('admin'); } else { return Redirect::back()->withInput()->withErrors('保存失败!'); } } /** * Remove the specified resource from storage. * * @param int $id * @return Response */ public function destroy($id) { $page = Page::find($id); $page->delete(); return Redirect::to('admin'); } }
4.4 创建视图文件
首先在 learnlaravel5/resources/views 下创建 admin/pages 两级文件夹。
然后创建 learnlaravel5/resources/views/admin/pages/create.blade.php:

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