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In this article we will cover on how to implement laravel eloquent when condition. i would like to show you laravel eloquent if condition. i explained simply step by step laravel eloquent when example. i explained simply step by step laravel eloquent when where.

Laravel eloquent added new function call when(), using when() you can ignore to write manually if conditional statement. i will give you some example how to use it when and how to write if condition with eloquent query builder. you can also use when() with laravel 6, laravel 7, laravel 8, laravel 9, laravel 10 and laravel 11 version:

let's see some examples and it will help you understand:

Simple When() Example:

Bed Way: If Condition

<?php
  
namespace App\Http\Controllers;
  
use App\Models\Post;
use Illuminate\Http\Request;
  
class PostController extends Controller
{
    /**
     * Write code on Method
     *
     * @return response()
     */
    public function index(Request $request)
    {
        $posts = Post::select("*");
  
        if ($request->has('user_id')) {
            $posts = $posts->where('user_id', $request->user_id);
        }
  
        $posts = $posts->get();
   
        dd($posts);
    }
}

Good Way: using when()

<?php
  
namespace App\Http\Controllers;
  
use App\Models\Post;
use Illuminate\Http\Request;
  
class PostController extends Controller
{
    /**
     * Write code on Method
     *
     * @return response()
     */
    public function index(Request $request)
    {
        $posts = Post::select("*")
                    ->when($request->has('user_id'), function ($query) use ($request) {
                        $query->where('user_id', $request->user_id);
                    })
                    ->get();
  
        dd($posts);
    }
}

When() Else Example:

Bed Way: If Condition

<?php
  
namespace App\Http\Controllers;
  
use App\Models\Post;
use Illuminate\Http\Request;
  
class PostController extends Controller
{
    /**
     * Write code on Method
     *
     * @return response()
     */
    public function index(Request $request)
    {
        $posts = Post::select("*");
  
        if ($request->get('order_by') == "publish_date") {
            $posts = $posts->orderBy('publish_date', 'desc');
        } else {
            $posts = $posts->orderBy('created_at', 'desc');
        }
  
        $posts = $posts->get();
   
        dd($posts);
    }
}

Good Way: using when()

<?php
  
namespace App\Http\Controllers;
  
use App\Models\Post;
use Illuminate\Http\Request;
  
class PostController extends Controller
{
    /**
     * Write code on Method
     *
     * @return response()
     */
    public function index(Request $request)
    {
        $posts = Post::select("*")
                    ->when($request->get('order_by') == "publish_date", function ($query) {
                            return $query->orderBy('publish_date', 'desc');
                        }, function ($query) {
                            return $query->orderBy('created_at', 'desc');
                        })
                        ->get();
   
        dd($posts);
    }
}

Multiple When() Condition Example:

<?php
  
namespace App\Http\Controllers;
  
use App\Models\Post;
use Illuminate\Http\Request;
  
class PostController extends Controller
{
    /**
     * Write code on Method
     *
     * @return response()
     */
    public function index(Request $request)
    {
        $posts = Post::select("*")
                    ->when($request->has('user_id'), function ($query) use ($request) {
                        $query->where('user_id', $request->user_id);
                    })
                    ->when($request->has('category_id'), function ($query) use ($request) {
                        $query->where('category_id', $request->category_id);
                    })
                    ->when($request->has('title'), function ($query) use ($request) {
                        $query->where('title', 'LIKE', '%' . $request->title .'%');
                    })
                    ->get();
   
        dd($posts);
    }
}

I hope it can help you...