fail to show allert " No data" when data is does not in database - laravel

Question

i am using laravel 5.4 ,, i use filter by serial number, i want to when the serial number is not save in database, show the allert "no data" , but when i filter data serial number is not save to database, the page is not show the allert,,
this is my blade..
#extends('layouts.master')
#section('content')
......................................
<div class="panel panel-default">
#if (!$instrumentType->instruments->isEmpty())
<table class="table">
#foreach ($instruments as $instrument)
<tr>
<td>
Serial Number : {{ $instrument->serial_number }}
#if($instrument->customer !== NULL)
<div class="text-muted"><i class="fa fa-hospital-o" aria-hidden="true"></i> {{ $instrument->customer->name }}</div>
#endif
#if($instrument->contractType !== NULL)
<div class="text-muted"><i class="fa fa-compress" aria-hidden="true"></i> {{ $instrument->contractType->name }}</div>
#endif
</td>
<td>
<div class="pull-right">
<a type="button" href="{{ route('instrument.edit', ['instrumentType' => $instrumentType->id, 'instrument' => $instrument->id]) }}"
class="btn btn-success ">
<i class="fa fa-pencil"></i> Edit
</a>
#if($instrument->customer == NULL || $instrument->contractType == NULL)
<a href="{{ route('instrument.destroy', ['instrumentType' => $instrumentType->id, 'instrument' => $instrument->id]) }}"
data-method="delete" data-confirm="" class="btn btn-danger">
<i class="fa fa-trash"></i> <span class="hidden-xs">Delete</span>
</a>
#endif
</div>
</td>
</tr>
#endforeach
</table>
<div class="paginator text-center">{{ $instruments->links() }}</div>
#else
<div class="panel-body">
<div class="alert alert-warning text-center">No data.</div>
</div>
#endif
</div>
#endsection
.

Answer 1

you can get count of array with :
count($instrumentType->instruments)
add this code as your statement :
#if(count($instrumentType->instruments))
//
#else
//
#endif