PHPORM-68 Fix unique validator when the validated value is part of an existing value

Author: GromNaN

src/Validation/DatabasePresenceVerifier.php

@@ -2,6 +2,8 @@
 
 namespace Jenssegers\Mongodb\Validation;
 
+use MongoDB\BSON\Regex;
+
 class DatabasePresenceVerifier extends \Illuminate\Validation\DatabasePresenceVerifier
 {
     /**
@@ -17,7 +19,7 @@ class DatabasePresenceVerifier extends \Illuminate\Validation\DatabasePresenceVe
      */
     public function getCount($collection, $column, $value, $excludeId = null, $idColumn = null, array $extra = [])
     {
-        $query = $this->table($collection)->where($column, 'regex', '/'.preg_quote($value).'/i');
+        $query = $this->table($collection)->where($column, new Regex('^'.preg_quote($value).'$', '/i'));
 
         if ($excludeId !== null && $excludeId != 'NULL') {
             $query->where($idColumn ?: 'id', '<>', $excludeId);

tests/ValidationTest.php

@@ -48,6 +48,12 @@ public function testUnique(): void
         );
         $this->assertFalse($validator->fails());
 
+        $validator = Validator::make(
+            ['name' => 'John'], // Part of an existing value
+            ['name' => 'required|unique:users']
+        );
+        $this->assertFalse($validator->fails());
+
         User::create(['name' => 'Johnny Cash', 'email' => '[email protected]']);
 
         $validator = Validator::make(