Add relations in tables, add saving states for datatables, minor fixes

app/Repositories/Core/Arrays.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Repositories\Core;
+
+class Arrays
+{
+    public static function changeKeyName($array, $newkey, $oldkey)
+    {
+        foreach ($array as $key => $value) {
+            if (is_array($value)) {
+                $array[$key] = self::changeKeyName($value, $newkey, $oldkey);
+            } else {
+                $array[$newkey] =  $array[$oldkey];    
+            }
+        }
+        unset($array[$oldkey]);
+        return $array;   
+    }
+    
+}