Dynamic Dependent Dropdown In Laravel 10 Using jQuery Ajax

Laravel 10 dynamic dependent dropdown using jQuery ajax; Through this tutorial, i am going to show you how to implement dynamic dependent dropdown in Laravel 10 using jQuery ajax.

In this tutorial, i will create jquery ajax categories and subcategories select dropdown in Laravel 10 app. Or show subcategories according to selected category value in dropdown in Laravel 10 using ajax.

Laravel 10 Dynamic Dependent Dropdown Using jQuery Ajax

Use the below given steps to create laravel, jquery ajax categories and subcategories, select dropdown:

• Step 1 – Installing Laravel 10 Application
• Step 2 – Database Configuration
• Step 3 – Creating Model & Migration
• Step 4 – Make Routes
• Step 5 – Creating Controller
• Step 6 – Create Blade View
• Step 7 – Start Development Server
• Step 8 – Run This App On Browser

Step 1 – Installing Laravel 10 Application

In step 1, open your terminal and navigate to your local web server directory using the following command:

//for windows user
cd xampp/htdocs

//for ubuntu user
cd var/www/html

Then install laravel latest application using the following command:

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

Step 2 – Database Configuration

In step 2, open your downloaded laravel app into any text editor. Then find .env file and configure database detail like following:

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=db name
DB_USERNAME=db user name
DB_PASSWORD=db password

Step 3 – Creating Model & Migration

In step 3, open command prompt and navigate to your project by using the following command:

cd / myApp

Then create model and migration file by using the following command:

php artisan make:model Category -m

The above command will create two files into your Laravel 10 ajax dynamic dropdown tutorial app, which is located inside the following locations:

• /app/Models/Category.php
• /database/migrations/create_categories_table.php

So, find create_events_table.php file inside /database/migrations/ directory. Then open this file and add the following code into function up() on this file:

    public function up()
    {
        Schema::create('categories', function (Blueprint $table) {
            $table->id();
            $table->string('name');
            $table->unsignedInteger('parent_id')->nullable();
            $table->timestamps();
        });
    }

Next navigate to app and open Category.php model file. Then update the following code into your app/Category.php file as follow:

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Category extends Model
{
    protected $guarded = [];
    
    public function subcategories(){
        return $this->hasMany('App\Category', 'parent_id');
    }
}

Now, open again your terminal and type the following command on cmd to create tables into your selected database:

php artisan migrate

Step 4 – Create Routes

In step 4, open your web.php file, which is located inside routes directory. Then add the following routes into web.php file:

<?php

use Illuminate\Support\Facades\Route;
use App\Http\Controllers\FullCalendarController;

Route::get('dynamic-dropdown', [DynamicDropDownController::class, 'index']);
Route::post('fetch', [DynamicDropDownController::class, 'fetch']);

Step 5 – Creating Controller

In step 5, create dynamic dropDown controller by using the following command:

php artisan make:controller DynamicDropDownController

The above command will create DynamicDropDownController.php file, which is located inside /app/Http/Controllers/ directory.

So open DynamicDropDownController.php file and add the following code into it:

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Models\Category;

use response;

class DynamicDropDownController extends Controller
{
    public function index(Request $request)
    {
          
      $cat= Category::where('parent_id',0)->get();
     
      return view('category',["categories" => $cat]);
    }    


    public function fetch(Request $request)
    {
         
        $parent_id = $request->cat_id;
         
        $subcategories = Category::where('id',$parent_id)
                              ->with('subcategories')
                              ->get();
        return response()->json([
            'subcategories' => $subcategories
        ]);
    }   
}

Step 6 – Create Blade View

In step 6, create new blade view file that named category.blade.php inside resources/views directory. And add the following code into category.blade.php file:

<html lang="{{ app()->getLocale() }}">
   <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>Laravel 10 jquery ajax categories and subcategories dropdown</title>
      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
      <link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet">
      <meta name="csrf-token" content="{{ csrf_token() }}" />
   </head>
   <body>
      <div class="container" style="margin-top: 50px; margin-left: 300px">
         <div class="row">
            <div class="col-lg-6">
               <form action="">
                  <h4>Category</h4>
                  <select class="browser-default custom-select" name="category" id="category">
                     <option selected>Select category</option>
                     @foreach ($categoris as $item)
                     <option value="{{ $item->id }}">{{ $item->name }}</option>
                     @endforeach
                  </select>
                  <h4>Subcategory</h4>
                  <select class="browser-default custom-select" name="subcategory" id="subcategory">
                  </select>
               </form>
            </div>
         </div>
      </div>
   </body>
   <script type = "text/javascript" >
    $.ajaxSetup({
        headers: {
            'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
        }
    });
   $(document).ready(function() {
       $('#category').on('change', function(e) {
           var cat_id = e.target.value;
           $.ajax({
               url: "{{ route('subcat') }}",
               type: "POST",
               data: {
                   cat_id: cat_id
               },
               success: function(data) {
                   $('#subcategory').empty();
                   $.each(data.subcategories[0].subcategories, function(index, subcategory) {
                       $('#subcategory').append('<option value="' + subcategory.id + '">' + subcategory.name + '</option>');
                   })
               }
           })
       });
   }); 
</script>
</html>

• The following laravel, jquery ajax code for show subcategories according to select category dropdown:

   $(document).ready(function() {
       $('#category').on('change', function(e) {
           var cat_id = e.target.value;
           $.ajax({
               url: "{{ route('subcat') }}",
               type: "POST",
               data: {
                   cat_id: cat_id
               },
               success: function(data) {
                   $('#subcategory').empty();
                   $.each(data.subcategories[0].subcategories, function(index, subcategory) {
                       $('#subcategory').append('<option value="' + subcategory.id + '">' + subcategory.name + '</option>');
                   })
               }
           })
       });
   }); 

Step 7 – Start Development Server

Finally, open your command prompt again and run the following command to start development server for your Laravel 10 dynamic dependent dropdown app:

php artisan serve

Step 8 – Run This App On Browser

In step 8, open your browser and fire the following url into your browser:

http://127.0.0.1:8000/dynamic-dropdown

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