構建你人生裡的第一個 Laravel 項目

安裝 Laravel 安裝器

composer global require "laravel/installer"

創建項目

laravel new links

檢查是否安裝成功

訪問地址：http://localhost/links/public/。看到歡迎頁面，表示安裝成功。

構建認證系統

執行命令：php artisan make:auth和php artisan migrate。

> php artisan make:auth
Authentication scaffolding generated successfully.
> php artisan migrate
Migration table created successfully.
Migrated: 2014_10_12_000000_create_users_table
Migrated: 2014_10_12_100000_create_password_resets_table

然後，修改文件 resource/views/layouts/app.blade.php。

<link href="{{ asset('css/app.css') }}" rel="stylesheet">

<script src="{{ asset('js/app.js') }}"></script>

現在系統裡就有註冊、登錄功能了。

創建 Model & 插入數據

創建 Model

創建遷移文件

php artisan make:migration create_links_table --create=links

遷移文件內容

Schema::create('links', function (Blueprint $table) {
      $table->increments('id');
      $table->string('title');
      $table->string('url')->unique;
      $table->text('description');
      $table->timestamps;
});

執行遷移

php artisan migrate

創建 Model

php artisan make:model Link

在 ModelFactory.php中為 Link Model 定義工廠方法

$factory->define(App\Link::class, function (Faker\Generator $faker) {
    return [
        'title' => $faker->name,
        'url' => $faker->url,
        'description' => $faker->paragraph,
    ];
});

創建種子文件 LinksTableSeeder.php

php artisan make:seeder LinksTableSeeder

在種子文件中使用工廠方法

public function run
{
    factory(App\Link::class, 10)->create;
}

在 DatabaseSeeder.php中註冊種子文件

$this->call(LinksTableSeeder::class);

執行種子文件[^注一]

php artisan db:seed

路由和視圖

// routes/web.php

Route::get('/', function  {
    $links = \App\Link::all;
    return view('welcome', ['links' => $links]);
});

// resources/views/welcome.blade.php
<div class="links">
     @foreach ($links as $link)
        <a href="{{ $link->url }}">{{ $link->title }}</a>
     @endforeach
</div>

數據提交

路由 link/submit

use Illuminate\Http\Request;

Route::get('link/submit', function  {
    return view('link.submit');
});

Route::post('link/submit', function(Request $request) {
    $validator = Validator::make($request->all, [
        'title' => 'required|max:255',
        'url' => 'required|max:255',
        'description' => 'required|max:255',
    ]);
    if ($validator->fails) {
        return back
 ->withInput
 ->withErrors($validator);
    }
    $link = new \App\Link;
    $link->title = $request->title;
    $link->url = $request->url;
    $link->description = $request->description;
    $link->save;
    return redirect('/');
});

視圖 resources/views/link/submit.blade.php

@extends('layouts.app')

@section('content')
    <div class="container">
        <div class="row">
 <h1>Submit a link</h1>

 @if (count($errors) > 0)
 <div class="alert alert-danger">
 <ul>
 @foreach ($errors->all as $error)
 <li>{{ $error }}</li>
 @endforeach
 </ul>
 </div>
 @endif

 <form action="{{ url('link/submit') }}" method="post">
 {!! csrf_field !!}
 <div class="form-group">
 <label for="title">Title</label>
 <input type="text" class="form-control" id="title" name="title" placeholder="Title" value="{{ old('title') }}">
 </div>
 <div class="form-group">
 <label for="url">Url</label>
 <input type="text" class="form-control" id="url" name="url" placeholder="URL" value="{{ old('url') }}">
 </div>
 <div class="form-group">
 <label for="description">Description</label>
 <textarea class="form-control" id="description" name="description" placeholder="description">{{ old('description') }}</textarea>
 </div>
 <button type="submit" class="btn btn-default">Submit</button>
 </form>
        </div>
    </div>
@endsection

tags: Laravel項目