fix some problems

app/Services/ExportCollection.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Services;
+
+use Maatwebsite\Excel\Concerns\FromCollection;
+
+class ExportCollection implements FromCollection
+{
+
+    protected $data;
+
+    public function __construct( $data)
+    {
+        $this->data = $data;
+    }
+
+    public function collection()
+    {
+        return $this->data;
+    }
+
+}