Laravel 5 framework learning form, laravel5 framework form_PHP tutorial

Laravel 5 framework learning form, laravel5 framework form

First, let us modify the routing to add the publication of an article.

Copy code The code is as follows:
Route::get('articles/create', 'ArticlesController@create');

Then modify the controller

Copy code The code is as follows:
Public function create() {
         return view('articles.create');
}

We return a view and create a new view. Of course we could create the form directly using HTML, but we have a more functional way. We use an open source library, illuminatehtml developed by Jeffrey Way. Install dependent libraries:

Copy code The code is as follows:
composer require illuminate/html

Laravel’s library needs to be registered in laravel before it can be used. In config/app.php, we can see the provider field provided by laravel, which describes the library functions of laravel. In Laravel Framewirk Service Providers... finally add our new HtmlProvider

Copy code The code is as follows:
'IlluminateHtmlHtmlServiceProvider',

We don’t want to use a long name like IlluminateHtmlFromFacade to introduce it, we need a short name. Find the aliases section in the current app.php and add the alias at the end.

Copy code The code is as follows:
'Form' => 'IlluminateHtmlFormFacade',
'Html' => 'IlluminateHtmlHtmlFacade',

OK, now let’s create the view, views/articles/create.blade.php

@extends('layout')

@section('content')
  <h1>Write a New Article</h1>

  <hr/>

  {{--使用我们添加的 illuminate\html 开源库--}}
  {!! Form::open() !!}

  {!! Form::close() !!}

@stop

Visit /articles/create and see the error, Why? Let’s test to see what went wrong. Make the following changes in the controller:

  public function show($id) {
    dd('show');
    
    $article = Article::findOrFail($id);

    return view('articles.show', compact('article'));
  }

Yes, you read that right, the dd() method is added to the show method. This method simply outputs a message and then dies. Let’s visit /articles/create again. What do you see? You see the output of show .

Why did the route show us when we accessed create? Let’s take a look at the route and see what happened.

Copy code The code is as follows:
Route::get('articles', 'ArticlesController@index');
Route::get('articles/{id}', 'ArticlesController@show');
Route::get('articles/create', 'ArticlesController@create');

The above is our route, notice that articles/{id} means that this is a wildcard, everything after articles/ will match, do you know? Our /articles/create is also matched by him. OMG!

The solution is to adjust the order:

Copy code The code is as follows:
Route::get('articles', 'ArticlesController@index');
Route::get('articles/create', 'ArticlesController@create');
Route::get('articles/{id}', 'ArticlesController@show');

That is, from special to ordinary, you should always pay attention to this issue in future routing settings. Now we are accessing articles/create and everything is fine.

Check the source code in the browser, you will find that not only method and action are generated, but also a hidden _token field is generated as the server verifies the form to avoid forgery attacks by hackers.

Let’s modify our view and add fields:

@extends('layout')

@section('content')
  <h1>Write a New Article</h1>

  <hr/>

  {{--使用我们添加的 illuminate\html 开源库--}}
  {!! Form::open() !!}
    <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::submit('Add Article', ['class' => 'btn btn-primary form-control']) !!}
    </div>

  {!! Form::close() !!}

@stop

When the form is submitted, it is actually submitted to articles/create using the post method. However, according to RESTful habits, we hope to be able to post to /articles. Let's modify the form method of the view and set the submission path.

Copy code The code is as follows:
{!! Form::open(['url' => 'articles']) !!}

Then we handle the form submission event in the route.

Copy code The code is as follows:
Route::post('/articles', 'ArticlesController@store');

Let’s handle the controller

//注意：将下面的 use 语句删除，我们使用 facade 接口中的 Request
//use App\Http\Requests\Request;

//引入下面的命名空间中的 Request
use Illuminate\Support\Facades\Request;

  public function store() {
    //使用 Illuminate\Html\Request 来返回全部的表单输入字段
    $input = Request::all();

    //我们直接返回$input，来看一下
    return $input;
  }

We can directly see the json result of the input form. If you only need the value of the title field, you can use Request::get('titel') .

How to add it to the database? With the help of the model, we can directly adopt the following method,

Article::create($input);

It’s that simple, it’s that willful

If you haven’t forgotten Mass Assignment, we defined the $fillable array in our model to define those fields that can be filled directly during create.

Modify the controller, add it to the model, and store it in the database.

  public function store() {
    $input = Request::all();
    Article::create($input);

    return redirect('articles');
  }

Try adding a record, it’s great. But don't forget. We also have a field called published_at , let's deal with that.

  public function store() {
    $input = Request::all();
    $input['published_at'] = Carbon::now();

    Article::create($input);
    
    return redirect('articles');
  }

Add a new record and test it.

There is another problem. The newly added one should be displayed at the front. Let’s modify the following controller.

 public function index() {
    //倒序获取文章
    //可以这样
    //$articles = Article::orderBy('published_at', 'desc')->get();
    //简单方式，当然还有 oldest()
    $articles = Article::latest('published_at')->get();

    return view('articles.index', compact('articles'));
  }

The above is the entire content of this article. I hope it will be helpful to everyone learning the Laravel5 framework.