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GET parameter
  request()->query->remove('key');
POST parameter
  request()->request->remove('key');

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wget https://dl.pstmn.io/download/latest/linux64 -O postman.tar.gz
sudo tar -xzf postman.tar.gz -C /opt
rm postman.tar.gz
sudo ln -s /opt/Postman/Postman /usr/bin/postman

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//this is example how to return a relationship instance in laravel if u have some logic to get it or troubles

public function user()
    {
    $id = ///some code to get $id
        return $this->hasOne(User::class, 'id', 'id') // this just for new hasOne instance
            ->orWhere('id', $id); //get your niddle instanse
    }

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//Client model
private $notSaleSections = ['ТПМ-УПП', 'ТПМ-МДФ'];
public function saleParams()
    {
        return $this->hasMany(ClientParameter::class, 'customer', 'id')
            ->whereHas('param', function ($q) {
                $q->where('section', null);
                
                foreach ($this->notSaleSections as $s){
                    $q->orWhere('section', '!=', $s);

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//Kernel
'permission' => \App\Http\Middleware\Permissions::class,
//Middleware\Permissions
public function handle($request, Closure $next, $permission = '')
    {
        if (!$request->user() || !$request->user()->hasPermission($permission)) {
            return redirect('/');
        }

        return $next($request);

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 sudo npm --global install yarn@1.12.3

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curl -sSL https://raw.githubusercontent.com/DefaultValue/ubuntu_post_install_scripts/master/ubuntu_18.04.sh | sh

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<?php

namespace App\Providers;


use App\Permission;
use Cache;
use Illuminate\Contracts\Auth\Access\Gate as GateContract;
use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;

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//Controller Category - ['id', 'parent_id', 'name']
$categories = Category::all();
//menu.balde.php
<div class="dropdown">
                <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenu2" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                    Catalog
                </button>
                <div class="dropdown-menu mainMenu" aria-labelledby="dropdownMenu2">
                    </ul>
                    <div class="childMenu">

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$products = null;
Category::whereId($category_id)->with([
'products' => function ($q) use (&$products, $search) {
$products = $q->where('active', true)
->search($search) //Scope
->get()
->unique();
},
'childrens.products' => function ($q) use (&$products, $search) {