Laravel

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Installation

sudo apt install composer

Creating a project named 'code':

composer create-project --prefer-dist laravel/laravel hello
cp .env.example .env
php artisan key:generate
sudo chmod -R 777 storage/

Testing output:

php artisan serve --host 0.0.0.0 --port 8082

Edit hosts file:

sudo nano /etc/hosts
192.168.1.35	hello.dev

Create a new apache conf file:

sudo nano /etc/apache2/sites-available/laravel.conf
<VirtualHost *:80>
    ServerName hello.dev

    ServerAdmin webmaster@localhost
    DocumentRoot /var/www/html/hello/public

    <Directory /var/www/html/hello/public>
        AllowOverride All
    </Directory>

    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
sudo nano /etc/apache2/ports.conf
Listen 80
sudo a2ensite laravel.conf
sudo service apache2 restart

The site should be available now at:

http://hello.dev/

Auth

Enable Authentication

php artisan make:auth


Site Creation

Routes

cd routes/
sudo nano web.php
Route::get('contact', function () {
    return 'Hello from Aman';
});

Route::get('contact/{category}', function ($category) {
    return 'Hello from '.$category. ' Aman';
});

Check resulting pages:

http://192.168.1.35/hello/public/contact/
http://192.168.1.35/hello/public/contact/Test

Views

Create a new View file:

cd ../resources/views/
sudo touch master.blade.php
sudo nano master.blade.php

Paste below contents:

<!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>HELLO</title>

</head>
<body>

	<nav class="navbar navbar-inverse">
	<div class="container-fluid">

	 <div class="navbar-header">
		<a class="navbar-brand" href="{{url('/home')}}">Home</a>
	 </div>

	 <div>
		<ul class="nav navbar-nav">
		<li><a href="{{url('/view')}}">View All</a></li>
		<li><a href="{{url('/new')}}">Add New</a></li>
		<li><a href="{{url('/edit')}}">Edit/Delete</a></li>
		</ul>
	 </div>

	</div>
	</nav>

	<div class="container">
	  @yield('content')
	</div>

<!-- Online Links -->
	<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>
	<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" >

</body>
</html>


Edit Routes for this file:

cd ../../routes/
sudo nano web.php 
Route::get('/home', function () {
    return view('home');
});

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

Route::get('/new', function () {
    return view('new');
});

Route::get('/edit', function () {
    return view('edit');
});

Create above defined VIEW page:

cd ../resources/views/
sudo touch view.blade.php 
sudo nano view.blade.php

Paste below contents:

@extends('master')

@section('content')

VIEW all content goes here

@endsection

Similarly create HOME page:

sudo nano home.blade.php
@extends('master')

@section('content')

HOME all content goes here

@endsection

Similarly create NEW page:

sudo nano new.blade.php
@extends('master')

@section('content')

NEW all content goes here

@endsection

Similarly create EDIT page:

sudo nano edit.blade.php
@extends('master')

@section('content')

EDIT all content goes here

@endsection

Test above page:

http://192.168.1.35/hello/public/home

Controller

  • Routes page can call URLs but this is for small applications only.
  • For industrial applications, use Controllers.

Create a Controller:

sudo php artisan make:controller RecordController

Edit the above generated file:

cd app/Http/Controllers/
sudo nano RecordController.php 

Append below contents:

class RecordController extends Controller
{
  public function showAll()
        {
                return view('view');
        }

  public function showNew()
        {
                return view('new');
        }

  public function showEdit()
        {
                return view('edit');
        }
}

Update the Routes file to use above controllers:

cd ../../routes/
sudo nano web.php

Append below content:

Route::get('/view', 'RecordController@showAll');

Route::get('/new', 'RecordController@showNew');

Route::get('/edit', 'RecordController@showEdit');

Database

  • Easy to create & manage tables with Migrations in large environments.

Create a new DB 'hello' using phpmyadmin or below SQL Query:

create database hello;
grant all privileges on hello.* to aman@localhost identified by 'pwd@123';

Update the ENV file with this information:

sudo nano .env
DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=hello
DB_USERNAME=aman
DB_PASSWORD=pwd@123


Create a DB table using Artisan:

sudo php artisan make:migration create_records_table
Created Migration: 2017_09_19_190352_create_records_table

File is created under below location:

cd database/migrations/ && ls
2017_09_19_190352_create_records_table.php

Edit this file with below DB Table information:

sudo nano 2017_09_19_190352_create_records_table.php
    public function up()
    {
        Schema::create('records', function (Blueprint $table) {
            $table->increments('id');
            $table->string('country');
            $table->string('city');
            $table->string('date');
            $table->string('no_of_aliens');
            $table->string('color_of_aliens');
            $table->timestamps();
        });
    }

    public function down()
    {
        Schema::dropIfExists('records');
    }

Create the Tables:

sudo php artisan migrate

You can confirm the Tables created in phpmyadmin.

Eloquent

Create a model named Record

sudo php artisan make:model Record 
cd app/
sudo nano Record.php

Add below information

class Record extends Model
{
    protected $table='records';
    protected $fillable=['id','country','city','date','no_of_aliens','color_of_aliens'];

}

To Feed test data using Seeding, create seed file:

sudo php artisan make:seeder RecordsTableSeeder
cd database/seeds/
sudo nano RecordsTableSeeder.php 

Append below information:

use App\Record;    //to import records.php file

class RecordsTableSeeder extends Seeder
{
  public function run()
    {
       for ($i=0; $i<20; $i++)
        {
           Record::create
            (
                [
                   'country' => "country$i",
                   'city' => "city$i",
                   'date' => "date$i",
                   'no_of_aliens' => "no_of_aliens$i",
                   'color_of_aliens' => "color_of_aliens$i"
                ]
            );
        }
    }
}

Edit the Databse seeder file:

sudo nano DatabaseSeeder.php 
use App\Record;

class DatabaseSeeder extends Seeder
{
    public function run()
    {
        $this->call('RecordsTableSeeder');
    }

}

Now seed the file with dummy data:

sudo php artisan db:seed
Seeding: RecordsTableSeeder

You will be able to see this dummy data in phpmyadmin now.

View DB contents

  • Check all/Debug output from DB for troubleshooting:
sudo nano app/Http/Controllers/RecordController.php 

Append below code into relevant sections:

use App\Record;

class RecordController extends Controller
{
  public function showAll()
        {
        //      return view('view');
                dd(Record::all()) ;
        }

Check the View page, you will find all information there

http://hello.dev/view


  • Getting specific information from DB:
class RecordController extends Controller
{
  public function showAll()
        {
                $records=Record::all();
                return view('view')->with('records',$records);
        //      dd(Record::all()) ;
        }


sudo nano resources/views/view.blade.php
@extends('master')

@section('content')

	<div class="container-fluid">
		<div class="panel panel-default">
			<div class="panel-heading">
				<h3 class="panel-title">All Available Aliens </h3>
			</div>
			<div class="panel-body">
			   <div class="table-responsive">
			      <table class="table table-stripped table-bordered">
			         <thread>
				    <tr>
				       <th>Country</th>
				       <th>City</th>
				       <th>Dates</th>
				       <th>No of Aliens</th>
				       <th>Color of Aliens</th>
				    </tr>
				 </thread>
				 <tbody>
					@foreach($records as $key=>$record)
					 <tr>
					   <td>{{$record->country}}</td>
					   <td>{{$record->city}}</td>
					   <td>{{$record->date}}</td>
					   <td>{{$record->no_of_aliens}}</td>
					   <td>{{$record->color_of_aliens}}</td>
					 </tr>
					@endforeach
				 </tbody>
				</table>
			   </div>
			</div>
		  </div>
		</div>


@endsection

Check the View page, you will find useful information in a table here:

http://hello.dev/view

Entering Data

sudo nano resources/views/new.blade.php
@extends('master')

@section('content')

    <div class="container-fluid">
	<div class="panel panel-default">

	   <div class="panel-heading">
		<h3 class="panel-title">Report New Aliens</h3>
	   </div>
	   <div class="panel-body">
	    <form role="form" method="POST" action="{{url('/info')}}">
	    <input type="hidden" name="_token" value="{{ csrf_token() }}">

			<div class="form-group">
			<label class="col-md-3 control-label">Country:</label>
			<div class="col-md-9">
				<input type="text" class="form-control" name='country' value="{{ old('country') }}"/></br>
			</div>
			</div>
			<div class="form-group">
			<label class="col-md-3 control-label">City:</label>
			<div class="col-md-9">
				<input type="text" class="form-control" name='city' value="{{ old('city') }}"/></br>
			</div>
			</div>
			<div class="form-group">
			<label class="col-md-3 control-label">Date:</label>
			<div class="col-md-9">
				<input type="text" class="form-control" name='date' value="{{ old('date') }}"/></br>
			</div>
			</div>
			<div class="form-group">
			<label class="col-md-3 control-label">No of Aliens:</label>
			<div class="col-md-9">
				<input type="text" class="form-control" name='no_of_aliens' value="{{ old('no_of_aliens') }}"/></br>
			</div>
			</div>
			<div class="form-group">
			<label class="col-md-3 control-label">Color of Aliens:</label>
			<div class="col-md-9">
				<input type="text" class="form-control" name='color_of_aliens' value="{{ old('color_of_aliens') }}"/></br>
			</div>
			</div>
                        <div class="form-group">
                        <div class="col-md-6 col-md-offset-6">
                                <button type="submit" class="btn btn-success btn-block" value='Submit'>Submit</button>
                        </div>
                        </div>

	    </form>
	   </div>
	</div>
    </div>

@endsection


sudo nano routes/web.php
 Route::post('/info', 'RecordController@store');


Now you can see the Form Page:

http://hello.dev/new

Enable store Function to send data to DB

sudo nano app/Http/Controllers/RecordController.php
  public function store(Request $request)
        {
                $Record=new Record;

		$Record->country=$request->get('country');
		$Record->city=$request->get('city');
		$Record->date=$request->get('date');
		$Record->no_of_aliens=$request->get('no_of_aliens');
		$Record->color_of_aliens=$request->get('color_of_aliens');

		$Record->save();

		return redirect()->back(); // this will rediect back to the same page to enter more data
        }

Now you can enter the data from Form Page which will be saved into DB:

http://hello.dev/new

Data entered will be visible here:

http://hello.dev/view

Showing Messages

sudo nano app/Http/Controllers/RecordController.php

Inside this function:

 public function store(Request $request)

Below this file:

$Record->save();

Insert:

$request->session()->flash('flash_message','New record added successfully');


To show above errors/messages:

sudo nano resources/views/master.blade.php

Before this section:

        <div class="container">
          @yield('content')

Paste:

          @if(Session::has('flash_message'))
                <div class="alert alert-success">
                    {{ Session::get('flash_message') }}
                </div>
          @endif

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

Data Validation using Laravel Request

Generate a request file:

cd /var/www/html/hello
sudo php artisan make:request RecordDataRequest


Edit this file:

sudo nano app/Http/Requests/RecordDataRequest.php
    public function authorize()
    {
        return true;
    }


    public function rules()
    {
        return [
            'country'=>'required',
            'city'=>'required',
        ];
    }

Edit this file:

sudo nano app/Http/Controllers/RecordController.php

Append:

use App\Http\Requests\RecordDataRequest;


Edit this file:

sudo nano app/Http/Controllers/RecordController.php

Change:

public function store(Request $request)

To:

public function store(RecordDataRequest $request)

Code to display all error messages is already added in earlier section.



References





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