More explicit error when sheets() method doesn't return any sheets

src/Exceptions/NoSheetsFoundException.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace Maatwebsite\Excel\Exceptions;
+
+use LogicException;
+
+class NoSheetsFoundException extends LogicException implements LaravelExcelException
+{
+
+}

src/Jobs/QueueExport.php

@@ -5,6 +5,8 @@
 use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Foundation\Bus\Dispatchable;
 use Maatwebsite\Excel\Concerns\WithMultipleSheets;
+use Maatwebsite\Excel\Exceptions\NoSheetsFoundException;
+use Maatwebsite\Excel\Exceptions\NoTypeDetectedException;
 use Maatwebsite\Excel\Files\TemporaryFile;
 use Maatwebsite\Excel\Jobs\Middleware\LocalizeJob;
 use Maatwebsite\Excel\Writer;
@@ -30,9 +32,9 @@ class QueueExport implements ShouldQueue
     private $temporaryFile;
 
     /**
-     * @param  object  $export
-     * @param  TemporaryFile  $temporaryFile
-     * @param  string  $writerType
+     * @param object        $export
+     * @param TemporaryFile $temporaryFile
+     * @param string        $writerType
      */
     public function __construct($export, TemporaryFile $temporaryFile, string $writerType)
     {
@@ -52,7 +54,7 @@ public function middleware()
     }
 
     /**
-     * @param  Writer  $writer
+     * @param Writer $writer
      *
      * @throws \PhpOffice\PhpSpreadsheet\Exception
      */
@@ -66,6 +68,10 @@ public function handle(Writer $writer)
                 $sheetExports = $this->export->sheets();
             }
 
+            if (count($sheetExports) === 0) {
+                throw new NoSheetsFoundException('Your export did not return any sheet export instances, please make sure your sheets() method always at least returns one instance.');
+            }
+
             // Pre-create the worksheets
             foreach ($sheetExports as $sheetIndex => $sheetExport) {
                 $sheet = $writer->addNewSheet($sheetIndex);
@@ -78,7 +84,7 @@ public function handle(Writer $writer)
     }
 
     /**
-     * @param  Throwable  $e
+     * @param Throwable $e
      */
     public function failed(Throwable $e)
     {