show error while fetch username - laravel

Question

show error : Missing argument 1 for App\Http\Controllers\AdminLoginController::name()
public function name($username) {
$user = AdminLogin::find($username);
return response()->json($user);
}
AdminLoginController: Its a adminlogin controller code
class AdminLoginController extends Controller{
public function show(){
$res ="Hello world!";
return response()->json($res);
}
public function log() {
$users = AdminLogin::all();
return response()->json($users);
}
public function name($username) {
$user = AdminLogin::where('username',$username)->first();
return response()->json($user);
}
RouteLoginController: Its a adminlogin controller code :
<?php
$app->get('/', function () use ($app) {
return $app->version();
});
$app->group(['prefix' => 'api/v1'], function ($app)
{
$app->get('adminlogin', 'AdminLoginController#show'); //get single route
$app->get('user', 'AdminLoginController#log'); //get single route
$app->get('username', 'AdminLoginController#name'); //get single route
$app->post('adminlogin', 'AdminLoginController#login'); //get single route
});
Error :
(1/1) ErrorException
Missing argument 1 for App\Http\Controllers\AdminLoginController::name()

Answer 1

Your controller method is taking the username param but the route binding is not passing one. Change your route
$app->get('username', 'AdminLoginController#name');
to
$app->get('user/{username}', 'AdminLoginController#name');
If you don't want to change your route, change your controller function signature to the below (as shown in the other answers), and make sure you are passing the 'username' as request param while invoking the url.
public function name(\Illuminate\Http\Request $request) {
$user = AdminLogin::where('username',$request->username)->first();
return response()->json(['user' => $user]);
}

Answer 2

You are probably calling this function using an ajax request and putting the name in the query string. In this case, the name parameter will not be sent as an attribute of the function but will be part of the request object.
You can solve this like so:
public function name(\Illuminate\Http\Request $request) {
$user = AdminLogin::find($request->username);
return response()->json($user);
}

Answer 3

You should try this :
public function name($username) {
$user = AdminLogin::where('username',$username)->first();
return response()->json(['user' => $user]);
}
OR
public function name(\Illuminate\Http\Request $request) {
$user = AdminLogin::where('username',$request->username)->first();
return response()->json(['user' => $user]);
}