Laravel NotFoundHttpException although route exits - laravel

Question

I added a new route as:
Route::post('friendSend/{uid}','FriendController#sendFriendRequest')->name('friends.add');
and called it as a hyperlink to submit form:
<a href="{{route('friends.add',$user->uid)}}"
onclick="event.preventDefault();
document.getElementById('addfriend-form).submit();">
<i class="glyphicon glyphicon-facetime-video" style="color:#F44336;"></i> Add Friend
</a>
<form action="{{route('friends.add',$user->uid)}}" method="post" id="addfriend-form">
{{ csrf_field() }}
</form>
However when I click on the said link, I get redirected to /friendSend with the said error.
the route is visible in:
php artisan route:list
which makes sense since I called it via it's name 'friends.add'. It doesn't even go the controller.
I've already tried the following:
Laravel NotFoundHttpException although route exists
Controller:
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Friend;
use Auth;
class FriendController extends Controller
{
public function __construct()
{
$this->middleware('auth');
}
public function index()
{
return redirect()->route('home');
}
public function sendFriendRequest($id)
{
echo "hello world";
}
}
Update:
Manually entering the url as /friendSend/2 (or any number for that matter) works.

Answer 1

You are missing a ' in the onclick javascript.
<a href="{{route('friends.add',$user->uid)}}"
onclick="event.preventDefault();
document.getElementById('addfriend-form').submit();">
<i class="glyphicon glyphicon-facetime-video" style="color:#F44336;"></i> Add Friend
</a>
<form action="{{route('friends.add',$user->uid)}}" method="post" id="addfriend-form">
{{ csrf_field() }}
</form>
If this doesn't work, what is the href on the generated page? Do you have multiple of these forms on a single page?

Answer 2

I thing you are doing wrong on set the url in form submit.You are adding route like
href="{{route('friends.add',$user->uid)}}"
Just modified it as
href="{{route('friends.add',['uid' => $user->uid])}}"
You can refer Laravel Named Routes