polodev / create-read-update-delete-authentication-pagination-in-laravel-5.6-yt

create read update delete (crud), authentication, pagination in laravel 5.6

create read update delete, authentication and pagination in laravel 5.6

basic mvc structure

route 
 ||
controller <====> model 
 ||
view

software requirements

php, mysql, composer need to be installed in your mac, pc or linux system before creating project in laravel

installing laravel using composer

composer create-project laravel/laravel YourProjectName

file we usually make in laravel

app/Http/Controllers/Yourcontroller.php
app/yourmodel.php 
resoures/views/Yourview.php
database/factories/yourfactory.php
database/migrations/yourmigrationfile.php

file we usually change in laravel

routes/web.php
database/seeds/databaseSeeder.php

factories and seeds only require when we work with dummy/test data

command for making model, controller, factory and migration file

php artisan make:model YourModel
php artisan make:controller YourController
php artisan make:migration create_your_table_name
php artisan make:factory YourModel -m "app\yourmodelname"

here php artisan make:controller YourController will give me basic controller if we add resource flag after this command it will make a resource controller

php artisan make:controller YourController -r

we can make all 4 file using single command by adding a flag

php artisan make:model YourModel -a

connecting with dabase inside .env file . Whenever we change .env file we have to restart our artisan server

DB_DATABASE=blog
DB_USERNAME=root
DB_PASSWORD

---

Remember to always import class name on top of the file when necessary

---

defining default string maximum 191 chracter length inside AppServiceProvider boot method

Schema::defaultStringLength(191);

writing database table structure inside create_posts_table migration file

$table->string('title');
$table->text('content');

migrating table to database

php artisan migrate 

writing dummy data inside PostFactory.php using faker instance

'title' => $faker->sentence,
'content' => $faker->paragraph(6)

calling factory inside DatabaseSeeder.php file

# inside run method
factory(Post::class, 30)->create();

Here I generating 30 dummy post

seeding database with dummy data

php artisan db:seed

resource route in laravel

Route::resource('posts', 'PostController');

+--------+-----------+-------------------+---------------+---------------------------------------------+--------------+
| Domain | Method    | URI               | Name          | Action                                      | Middleware   |
+--------+-----------+-------------------+---------------+---------------------------------------------+--------------+
|        | GET|HEAD  | posts             | posts.index   | App\Http\Controllers\PostController@index   | web          |
|        | POST      | posts             | posts.store   | App\Http\Controllers\PostController@store   | web          |
|        | GET|HEAD  | posts/create      | posts.create  | App\Http\Controllers\PostController@create  | web          |
|        | GET|HEAD  | posts/{post}      | posts.show    | App\Http\Controllers\PostController@show    | web          |
|        | PUT|PATCH | posts/{post}      | posts.update  | App\Http\Controllers\PostController@update  | web          |
|        | DELETE    | posts/{post}      | posts.destroy | App\Http\Controllers\PostController@destroy | web          |
|        | GET|HEAD  | posts/{post}/edit | posts.edit    | App\Http\Controllers\PostController@edit    | web          |
+--------+-----------+-------------------+---------------+---------------------------------------------+--------------+

basic get route in laravel

Route::get('/', 'YourController@method');

showing a view in side a method

 public function index () {
  return view ('posts.index');
  # or
  return view ('posts/index');
 }

passing variable in a view

 $posts = Post::all();

 return view ('posts.index', ['posts' => $posts]);
 # or
 return view ('posts.index', compact('posts'));

validating in laravel

 
$this->validate($request, [
    'title' => 'required|min:3',
    'content' => 'required|min:10'
]);

showing validation error inside view file

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

csrf(cross site request forgery) token and method function inside form

# cross site request forgery   
@csrf 
# for update
@method('put')
# for delete
@method('delete')

yielding in master view for content section

# inside master.blade.php
@yield('content')

extends master in view file and write content inside content section

# inside index.balde.php
@extends('master')
@section('content')

@endsection

iterating variable using blade directives

@foreach($posts as $post)
{{$post->title}}
@endforeach

pagination in laravel

## inside controller 
$posts = Post::orderBy('id', 'desc')->paginate(10);

## inside view 
$posts->links()

redirect in laravel

redirect('/posts');
redirect(route('login'));
redirect()->back();

some model (eloquent) query we are use today

## for fetching posts from db 
$posts = Post::all();
$posts = Post::orderBy('id', 'desc')->paginate(10);

## for creating new record 

Post::create([
  'title' => $request->title,
  'content' => $request->content,
]);

## for deleting 

$post->delete();

built in authentication in laravel

php artisan make:auth   

adding middleware in controller inside construct function

public function __construct () {
    $this->middleware('auth')->except(['index', 'show']);
}

adding login logout inside master.blade.php file

@auth
<form class="d-inline-block float-right" action="{{route('logout')}}" method="post">
  @csrf
  <button class="btn btn-secondary">{{auth()->user()->name}} | Logout</button>
</form>
@else 
  <a href="{{route('login')}}" class="btn btn-secondary">Login</a>
@endauth

access authenticate user data

auth()->user()->name

how to redirect to certain routes after login or register

# RegisterController.php 
# LoginController.php

protected $redirectTo = '/posts';

how to run other people's laravel project in your pc

# installing vendor 
composer install

# clearing old config
php artisan config:clear
php artisan cache:clear

# making .env file 
copy .env.example file to .env file and changed database credentials    

# generating unique key for laravel app
php artisan key:generate

# migrate to database 
php artisan migrate

# seed with dummy data 
php artisan db:seed

# run local development server 
php artisan serve

further reading

https://laravel.com/docs/5.6

watch laracast jeffrey way's tutorial. He is the best web trainer in the planet. You will agree eventually after watching his tutorial.

https://laracasts.com/

Thank You

My name is Shibu deb polo
Thanks for watching
Take care