Difference between revisions of "Basic Laravel Training (for CV)"

Revision as of 23:27, 14 March 2019

Reference

Laravel Documentation

https://laravel.com/docs/5.8

Installation

Requirements

PHP >= 7.1.3
OpenSSL PHP Extension
PDO PHP Extension
Mbstring PHP Extension
Tokenizer PHP Extension
XML PHP Extension
Ctype PHP Extension
JSON PHP Extension
BCMath PHP Extension

Steps

Install LAMP Stack (ie. XAMPP) อย่าลืมจำ mysql root password!!
Install Composer
https://getcomposer.org/doc/00-intro.md#installation-linux-unix-macos

หมายเหตุ: เวลาเรียกใช้งาน composer อาจจะต้องใช้ ./composer.phar แทนที่ composer ถ้าทำการ Install composer เป็น local

สร้าง Laravel Project โดยใช้ composer

composer create-project --prefer-dist laravel/laravel PROJECT_NAME

Run Local Development Server

php artisan serve # for running on localhost:8000

or

php artisan serve --port=8888 # for running on localhost:8888

Basic Tutorial

Important directory / file

app Where the models are
- Http
  - Controllers
  - Middleware
config
database
public Where the public files (ie. css, js)
resources
- views
routes
- api.php
- web.php
vendor Where the additional libraries store
.env all environment variables (ie. DB username/password)

Intro

Controller & Route

Let's make a controller: page_controller
```
php artisan make:controller CONTROLLER_NAME
```
จะมีไฟล์ app/Http/Controllers/page_controller.php ปรากฎ

ในไฟล์จะมี code เหล่านี้

 1 <?php
 2 
 3 namespace App\Http\Controllers;
 4 
 5 use Illuminate\Http\Request;
 6 
 7 class page_controller extends Controller
 8 {
 9     //
10 }

ลองสร้าง method index

1     public function index(){
2         $menu = array("Home", "My course", "Setting");
3         return $menu;
4     }

เพิ่ม Route ใน routes/web.php

1 Route::get('home','page_controller@index');

ลองทดสอบเรียก url
```
http://localhost:8000/home
```
ปกติแล้วสิ่งที่ controller คืนมักจะไม่ใช่ array หรือ object ธรรมดา ยกเว้นกรณีที่กำลังเขียน api .. หากเป็นกรณี webpage มักจะคืนเป็น view
ลองสร้าง view (การสร้าง view จะไม่สามารถเรียกผ่าน artisan ได้ จะต้องสร้างด้วยตัวเอง ใน resources/views โดยให้สร้าง view ชื่อว่า home.blade.php

ใน controller method index จะเปลี่ยนแปลงการ return ให้ return view แทน

1     public function index(){
2         $menu = array("Home", "My course", "Setting");
3         return view("home")->with('menu',$menu);
4     }

ใน home.blade.php ให้ลองเขียน html เพื่อแสดง menu เป็น unordered list

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 6     <meta http-equiv="X-UA-Compatible" content="ie=edge">
 7     <title>Document</title>
 8 </head>
 9 <body>
10     <ul>
11         @foreach($menu as $eachmenu)
12             <li>{{$eachmenu}}</li>
13         @endforeach
14     </ul>
15 </body>
16 </html>

View (Blade Template)

<meta name="csrf-token" content="Template:Csrf token()">
Template:Config('app.name', 'Laravel')
@include('inc.messages')
@yield('content')
@extends('layouts.app')
@section('content')
@endsection
@if
@for
@foreach
@csrf
{{}}
{!! !!}

Database

Preparation

สร้าง database (สมมติว่าชื่อ laravel_training)

แก้ไข .env

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=laravel_training
DB_USERNAME=USERNAME
DB_PASSWORD=PASSWORD

แก้ไข file app/Providers/AppServiceProvider.php ข้างบนสุดเพิ่ม
```
use Illuminate\Support\Facades\Schema;
```
แก้ไข file app/Providers/AppServiceProvider.php function boot เพิ่ม
```
Schema::defaultStringLength(191);
```
ลอง migrate default script
```
php artisan migrate
```

Model & DB

php artisan make:model MODEL_NAME --migration
php artisan make:migration MIGRATION_NAME

Eloquent

new item

$course = new course();
$course->number = "2110221";
$course->title = "Computer Engineering Essentials";
$course->year = 2018;
$course->semester = 2;
$course->save();

fetch item

$allcourses = course::all();
$findcourse = course::find(1);
$findcourse = course::where(number,"2110221")->get();

// ->where("title","like","%".$keyword."%")
// ->orderBy('created_at','desc')
// ->paginate(10);
// In view show page numbers: {{$items->links()}}

edit item

$course = course::find(1);
$course->title = "NEW NAME";
$course->save();

delete item

$course = course::find(1);
$course->delete();

Handle CRUD

php artisan make:controller CONTROLLER_NAME --resource
method: get, post, patch, delete
Route::resource('ROUTE', 'CONTROLLER');
php artisan route:list

Handle request

$name = $request->input('name', 'Default'); 
$name = $request->name;

Validation --> See Doc

$request->validate([
    'title' => 'required|max:255',
    'body' => 'required',
]);

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

Relationship

one to one

Defining relationship
return $this->hasOne('App\Phone', 'foreign_key', 'local_key');
Defining inverse relationship
return $this->belongsTo('App\User', 'foreign_key', 'other_key');

one to many

Defining relationship
return $this->hasMany('App\Comment', 'foreign_key', 'local_key');
Defining inverse relationship
return $this->belongsTo('App\Post', 'foreign_key', 'other_key');

many to many

Defining relationship
return $this->belongsToMany('App\Role', 'role_user', 'user_id', 'role_id');

return $this->belongsToMany('Model','Intermediate table name','fk of current model','fk of another model')
Defining inverse relationship
return $this->belongsToMany('App\User', 'role_user', 'role_id', 'user_id');

return $this->belongsToMany('Model','Intermediate table name','fk of current model','fk of another model')

Authentication

User System

Access Control

Difference between revisions of "Basic Laravel Training (for CV)"

Revision as of 23:27, 14 March 2019

Contents