Try to prevent foreign key erros in ReleaseFile model

Author: DariusIII

Changelog

@@ -1,4 +1,5 @@
 2018-09-19 DariusIII
+	* Chg: Try to prevent foreign key erros in ReleaseFile model
 	* Chg: Use dirape/token to generate tokens and passwords for users
 2018-09-18 DariusIII
 	* Chg: Update laravel/framework to version 5.7.4

app/Models/ReleaseFile.php

@@ -107,9 +107,13 @@ public static function deleteReleaseFiles($id)
      */
     public static function addReleaseFiles($id, $name, $hash = '', $size, $createdTime, $hasPassword): int
     {
+        // Check if we already have this data in table
         $duplicateCheck = self::query()->where('releases_id', $id)->where('name', utf8_encode($name))->first();
 
-        if ($duplicateCheck === null) {
+        // Check if the release exists in releases table to prevent foreign key error
+        $releaseCheck = Release::query()->where('id', $id)->first();
+
+        if ($duplicateCheck === null && $releaseCheck !== null) {
             try {
                 $insert = self::create([
                         'releases_id' => $id,