Getting Started with the Laravel 5 Framework (4) Completed Chapter, Laravel Completed Chapter_PHP Tutorial

Laravel 5 Framework Getting Started (4) Finale, Laravel Finale

Page and comments will use the "one-to-many relationship" provided by Eloquent. In the end, we will get the prototype of a personal blog system and assign a large homework for everyone to practice.

1. First introduction to Eloquent

Laravel Eloquent ORM is a very important part of Laravel and one of the reasons why Laravel is so popular. Chinese documentation is at:

1. http://laravel-china.org/docs/5.0/eloquent

2. http://www.golaravel.com/laravel/docs/5.0/eloquent/

The learnlaravel5/app/Page.php that has been created in the previous tutorial is an Eloquent Model class:

<&#63;php namespace App;

use Illuminate\Database\Eloquent\Model;

class Page extends Model {

 //

}

If you want to learn more about Eloquent, it is recommended to read this series of articles: In-depth understanding of Laravel Eloquent

2. Create Comment model

First we need to create a new table to store Comments. Run the command line:

Copy code The code is as follows:
php artisan make:model Comment

After success, modify the corresponding location of the migration file learnlaravel5/database/migrations/***_create_comments_table.php to:

Schema::create('comments', function(Blueprint $table)
{
 $table->increments('id');
 $table->string('nickname');
 $table->string('email')->nullable();
 $table->string('website')->nullable();
 $table->text('content')->nullable();
 $table->integer('page_id');
 $table->timestamps();
});

After

run:

Copy code The code is as follows:
php artisan migrate

Go to the database and take a look. The comments table is already there.

3. Establish a "one-to-many relationship"

Modify Page model:

<&#63;php namespace App;

use Illuminate\Database\Eloquent\Model;

class Page extends Model {

 public function hasManyComments()
 {
  return $this->hasMany('App\Comment', 'page_id', 'id');
 }

}

Done~ The relationship between models in Eloquent is so simple.

Chinese documentation of relationships between models: http://laravel-china.org/docs/5.0/eloquent#relationships

4. Front desk submission function

Modify Comment model:

<&#63;php namespace App;

use Illuminate\Database\Eloquent\Model;

class Comment extends Model {

 protected $fillable = ['nickname', 'email', 'website', 'content', 'page_id'];

}

Add a line of routing:

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

Run the following command to create the CommentsController controller:

Copy code The code is as follows:
php artisan make:controller CommentsController

Modify CommentsController:

<&#63;php namespace App\Http\Controllers;

use App\Http\Requests;
use App\Http\Controllers\Controller;

use Illuminate\Http\Request;

use Redirect, Input;

use App\Comment;

class CommentsController extends Controller {

 public function store()
 {
 if (Comment::create(Input::all())) {
  return Redirect::back();
 } else {
  return Redirect::back()->withInput()->withErrors('评论发表失败！');
 }

 }

}

Modify the view learnlaravel5/resources/views/pages/show.blade.php:

@extends('_layouts.default')

@section('content')
 <h4>
  <a href="/">&#11013;&#65039;返回首页</a>
 </h4>

 <h1 id="page-title">{{ $page->title }}</h1>
 <hr>
 <div id="date" style="text-align: right;">
  {{ $page->updated_at }}
 </div>
 <div id="content" style="padding: 50px;">
  <p>
   {{ $page->body }}
  </p>
 </div>
 <div id="comments" style="margin-bottom: 100px;">

  @if (count($errors) > 0)
   <div class="alert alert-danger">
    <strong>Whoops!</strong> There were some problems with your input.<br><br>
    <ul>
     @foreach ($errors->all() as $error)
      <li>{{ $error }}</li>
     @endforeach
    </ul>
   </div>
  @endif

  <div id="new">
   <form action="{{ URL('comment/store') }}" method="POST">
    <input type="hidden" name="_token" value="{{ csrf_token() }}">
    <input type="hidden" name="page_id" value="{{ $page->id }}">
    <div class="form-group">
     <label>Nickname</label>
     <input type="text" name="nickname" class="form-control" style="width: 300px;" required="required">
    </div>
    <div class="form-group">
     <label>Email address</label>
     <input type="email" name="email" class="form-control" style="width: 300px;">
    </div>
    <div class="form-group">
     <label>Home page</label>
     <input type="text" name="website" class="form-control" style="width: 300px;">
    </div>
    <div class="form-group">
     <label>Content</label>
     <textarea name="content" id="newFormContent" class="form-control" rows="10" required="required"></textarea>
    </div>
    <button type="submit" class="btn btn-lg btn-success col-lg-12">Submit</button>
   </form>
  </div>

<script>
function reply(a) {
 var nickname = a.parentNode.parentNode.firstChild.nextSibling.getAttribute('data');
 var textArea = document.getElementById('newFormContent');
 textArea.innerHTML = '@'+nickname+' ';
}
</script>

  <div class="conmments" style="margin-top: 100px;">
   @foreach ($page->hasManyComments as $comment)

    <div class="one" style="border-top: solid 20px #efefef; padding: 5px 20px;">
     <div class="nickname" data="{{ $comment->nickname }}">
     @if ($comment->website)
      <a href="{{ $comment->website }}">
       <h3 id="comment-nickname">{{ $comment->nickname }}</h3>
      </a>
     @else
      <h3 id="comment-nickname">{{ $comment->nickname }}</h3>
     @endif
      <h6 id="comment-created-at">{{ $comment->created_at }}</h6>
     </div>
     <div class="content">
      <p style="padding: 20px;">
       {{ $comment->content }}
      </p>
     </div>
     <div class="reply" style="text-align: right; padding: 5px;">
      <a href="#new" onclick="reply(this);">回复</a>
     </div>
    </div>

   @endforeach
  </div>
 </div>
@endsection

The front desk comment function is completed.

View the effect:

5. Backend management function

Modify the base view learnlaravel5/resources/views/app.blade.php to:

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>Laravel</title>

 <link href="/css/app.css" rel="stylesheet">

 <!-- Fonts -->
 <link href='http://fonts.useso.com/css&#63;family=Roboto:400,300' rel='stylesheet' type='text/css'>
</head>
<body>
 <nav class="navbar navbar-default">
 <div class="container-fluid">
  <div class="navbar-header">
  <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
   <span class="sr-only">Toggle Navigation</span>
   <span class="icon-bar"></span>
   <span class="icon-bar"></span>
   <span class="icon-bar"></span>
  </button>
  <a class="navbar-brand" href="#">Learn Laravel 5</a>
  </div>

  <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
  <ul class="nav navbar-nav">
   <li><a href="/admin">后台首页</a></li>
  </ul>
  <ul class="nav navbar-nav">
   <li><a href="/admin/comments">管理评论</a></li>
  </ul>

  <ul class="nav navbar-nav navbar-right">
   @if (Auth::guest())
   <li><a href="/auth/login">Login</a></li>
   <li><a href="/auth/register">Register</a></li>
   @else
   <li class="dropdown">
    <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">{{ Auth::user()->name }} <span class="caret"></span></a>
    <ul class="dropdown-menu" role="menu">
    <li><a href="/auth/logout">Logout</a></li>
    </ul>
   </li>
   @endif
  </ul>
  </div>
 </div>
 </nav>

 @yield('content')

 <!-- Scripts -->
 <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
 <script src="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.1/js/bootstrap.min.js"></script>
</body>
</html>

Modify the background routing group (added a line):

Route::group(['prefix' => 'admin', 'namespace' => 'Admin', 'middleware' => 'auth'], function()
{
 Route::get('/', 'AdminHomeComtroller@index');
 Route::resource('pages', 'PagesController');
 Route::resource('comments', 'CommentsController');
});

Create AdminCommentsController:

Copy code The code is as follows:
php artisan make:controller Admin/CommentsController

Admin/CommentsController must have four interfaces: view all, view single, POST change, and delete:

<&#63;php namespace App\Http\Controllers\Admin;

use App\Http\Requests;
use App\Http\Controllers\Controller;

use Illuminate\Http\Request;

use App\Comment;

use Redirect, Input;

class CommentsController extends Controller {

 public function index()
 {
 return view('admin.comments.index')->withComments(Comment::all());
 }

 public function edit($id)
 {
 return view('admin.comments.edit')->withComment(Comment::find($id));
 }

 public function update(Request $request, $id)
 {
 $this->validate($request, [
  'nickname' => 'required',
  'content' => 'required',
 ]);
 if (Comment::where('id', $id)->update(Input::except(['_method', '_token']))) {
  return Redirect::to('admin/comments');
 } else {
  return Redirect::back()->withInput()->withErrors('更新失败！');
 }
 }

 public function destroy($id)
 {
 $comment = Comment::find($id);
 $comment->delete();

 return Redirect::to('admin/comments');
 }

}

Next create two views:

learnlaravel5/resources/views/admin/comments/index.blade.php：

@extends('app')

@section('content')
<div class="container">
 <div class="row">
  <div class="col-md-10 col-md-offset-1">
   <div class="panel panel-default">
    <div class="panel-heading">管理评论</div>

    <div class="panel-body">

    <table class="table table-striped">
     <tr class="row">
      <th class="col-lg-4">Content</th>
      <th class="col-lg-2">User</th>
      <th class="col-lg-4">Page</th>
      <th class="col-lg-1">编辑</th>
      <th class="col-lg-1">删除</th>
     </tr>
     @foreach ($comments as $comment)
      <tr class="row">
       <td class="col-lg-6">
        {{ $comment->content }}
       </td>
       <td class="col-lg-2">
        @if ($comment->website)
         <a href="{{ $comment->website }}">
          <h4 id="comment-nickname">{{ $comment->nickname }}</h4>
         </a>
        @else
         <h3 id="comment-nickname">{{ $comment->nickname }}</h3>
        @endif
        {{ $comment->email }}
       </td>
       <td class="col-lg-4">
        <a href="{{ URL('pages/'.$comment->page_id) }}" target="_blank">
         {{ App\Page::find($comment->page_id)->title }}
        </a>
       </td>
       <td class="col-lg-1">
        <a href="{{ URL('admin/comments/'.$comment->id.'/edit') }}" class="btn btn-success">编辑</a>
       </td>
       <td class="col-lg-1">
        <form action="{{ URL('admin/comments/'.$comment->id) }}" method="POST" style="display: inline;">
         <input name="_method" type="hidden" value="DELETE">
         <input type="hidden" name="_token" value="{{ csrf_token() }}">
         <button type="submit" class="btn btn-danger">删除</button>
        </form>
       </td>
      </tr>
     @endforeach
    </table>


    </div>
   </div>
  </div>
 </div>
</div>
@endsection

learnlaravel5/resources/views/admin/comments/edit.blade.php：

@extends('app')

@section('content')
<div class="container">
 <div class="row">
  <div class="col-md-10 col-md-offset-1">
   <div class="panel panel-default">
    <div class="panel-heading">编辑评论</div>

    <div class="panel-body">

     @if (count($errors) > 0)
      <div class="alert alert-danger">
       <strong>Whoops!</strong> There were some problems with your input.<br><br>
       <ul>
        @foreach ($errors->all() as $error)
         <li>{{ $error }}</li>
        @endforeach
       </ul>
      </div>
     @endif

     <form action="{{ URL('admin/comments/'.$comment->id) }}" method="POST">
      <input name="_method" type="hidden" value="PUT">
      <input type="hidden" name="_token" value="{{ csrf_token() }}">
      <input type="hidden" name="page_id" value="{{ $comment->page_id }}">
      Nickname: <input type="text" name="nickname" class="form-control" required="required" value="{{ $comment->nickname }}">
      <br>
      Email:
      <input type="text" name="email" class="form-control" required="required" value="{{ $comment->email }}">
      <br>
      Website:
      <input type="text" name="website" class="form-control" required="required" value="{{ $comment->website }}">
      <br>
      Content:
      <textarea name="content" rows="10" class="form-control" required="required">{{ $comment->content }}</textarea>
      <br>
      <button class="btn btn-lg btn-info">提交修改</button>
     </form>

    </div>
   </div>
  </div>
 </div>
</div>
@endsection

The background management function is completed, check the effect:

6. Big homework
The comment functions that rely on Page have been completed, and the prototype of the personal blog system was born. At the end of this series of tutorials, a big assignment is assigned: build the front and backend of Article, add a one-to-many relationship between Article and Comment, and add comments and comment management functions. In the process of doing this big assignment, you will go back to the previous tutorials repeatedly, read the Chinese documentation repeatedly, and read my code carefully. By the time you complete the big assignment, you will really get started with Laravel 5~~

The above is the entire content of this article, I hope you all like it.

http://www.bkjia.com/PHPjc/981345.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/981345.htmlTechArticleLaravel 5 Framework Getting Started (4) Finale, Laravel Finale Page and comments will use the "pair" provided by Eloquent Many relationships”. Finally, we will get the prototype of a personal blog system...