我们需要处理编辑文章的问题。当然我们可以手工添加新的路由,就像这样:
代码如下:
Route::get('/articles/{id}/edit', 'ArticleController@edit');
让我们在命令行下使用 artisan 的 route:list 来查看我们当前的路由:
代码如下:
php artisan route:list
在符合 RESTful 的情况下,可能直接使用 laravel 的 resource 路由是一种好的选择,然我们将所有的路由都去掉,只添加唯一的一个:
代码如下:
Route::resource('articles', 'ArticlesController');
再次使用 php artisan route:list 查看路由,哇,一堆的符合我们期望的路由产生了。每一项都仔细查看一下。
现在在控制器中添加方法:
public function edit($id) { $article = Article::findOrFail($id); return view('articles.edit', compact('article')); }
现在创建视图
@extends('layout') @section('content') <h1 id="Edit-article-title">Edit: {!! $article->title !!} </h1> <hr/> ...
好吧,我承认这些代码都是从 create.blade.php 中拷贝出来的,修改了一下,问题是我们需要重复吗?后面我们会处理这个问题,现在来看一下表单的提交问题。在路由中 php artisan route:list ,再看一遍,修改使用了 PATCH 方法,我们来修改视图:
代码如下:
{!! Form::open(['method' => 'PATCH', 'url' => 'articles/' . $article->id]) !!}
在浏览器中访问 /articles/1/edit ,查看一下源代码,发现laravel自动生成了 _method=PATCH 的隐藏字段。
一问题是,我们编辑文章,但是文章的信息并没有显示出来,我们修改一下视图:
代码如下:
{!! Form::model($article, ['method' => 'PATCH', 'url' => 'articles/' . $article->id]) !!}
OK,everything's ok,除了 published_on 字段仍然设置为当前日期,后面我们来处理。
现在在控制器中添加方法:
public function update($id, \Illuminate\Http\Request $request) { $article = Article::findOrFail($id); $article->update($request->all()); return redirect('articles'); }
我们在修改的过程中也需要验证,让我们复用我们的 Request 类,将 CreateArticleRequest 更名为更通用的 ArticleRequest,别忘了修改 store 方法中的参数。
public function update($id, Requests\ArticleRequest $request) { $article = Article::findOrFail($id); $article->update($request->all()); return redirect('articles'); }
现在剩下的问题是我们的新建和编辑使用了大部分相同的代码,比如显示错误,但他们存在两份,我们来修改这个问题。
我们直接在 views/articles 下面新建文件 list.blade.php,并把错误处理代码从 create.blade.php 中拷贝出来:
@if ($errors->any()) <ul class="alert alert-danger"> @foreach($errors->all() as $error) <li>{{ $error }}</li> @endforeach </ul> @endif
在 create.blade.php 只需用下面语句替换错误处理代码即可:
代码如下:
@include('articles.list')
让我们再来处理表单代码,表单代码中除了 form 不大一样和提交按钮有区别,其他都差不多。我们创建一个视图 articles/form_partial.blade.php,将代码拷贝出来
<div class="form-group"> {!! Form::label('title', 'Title:') !!} {!! Form::text('title', null, ['class' => 'form-control']) !!} </div> <div class="form-group"> {!! Form::label('body', 'Body:') !!} {!! Form::textarea('body', null, ['class' => 'form-control']) !!} </div> <div class="form-group"> {!! Form::label('published_at', 'Publish On:') !!} {!! Form::input('date', 'published_at', date('Y-m-d'), ['class' => 'form-control']) !!} </div> <div class="form-group"> {{--这里要设置变量,依据是编辑还是修改来改变,当然也可以不放置在partial中--}} {!! Form::submit($submitButtonText, ['class' => 'btn btn-primary form-control']) !!} </div>
修改 create.blade.php
@extends('layout') @section('content') <h1 id="Write-a-New-Article">Write a New Article</h1> <hr/> @include('articles.list') {{--使用我们添加的 illuminate\html 开源库--}} {!! Form::open(['url' => 'articles']) !!} @include('articles.form_partial', ['submitButtonText' => 'Add Article']) {!! Form::close() !!} @stop
修改 edit.blade.php
@extends('layout') @section('content') <h1 id="Edit-article-title">Edit: {!! $article->title !!} </h1> <hr/> @include('articles.list') {{--使用我们添加的 illuminate\html 开源库--}} {!! Form::model($article, ['method' => 'PATCH', 'url' => 'articles/' . $article->id]) !!} @include('articles.form_partial', ['submitButtonText' => 'Update Article']) {!! Form::close() !!} @stop
以上就是本文给大家介绍的全部内容了,希望能够对大家熟练掌握Laravel5框架有所帮助。

PHP is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.

PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.

PHP is not dead. 1) The PHP community actively solves performance and security issues, and PHP7.x improves performance. 2) PHP is suitable for modern web development and is widely used in large websites. 3) PHP is easy to learn and the server performs well, but the type system is not as strict as static languages. 4) PHP is still important in the fields of content management and e-commerce, and the ecosystem continues to evolve. 5) Optimize performance through OPcache and APC, and use OOP and design patterns to improve code quality.

PHP and Python have their own advantages and disadvantages, and the choice depends on the project requirements. 1) PHP is suitable for web development, easy to learn, rich community resources, but the syntax is not modern enough, and performance and security need to be paid attention to. 2) Python is suitable for data science and machine learning, with concise syntax and easy to learn, but there are bottlenecks in execution speed and memory management.

PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.


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