Merge branch 'bug/add_many_referencing_property_object'

Author: Ethan Hann

src/Index.php

@@ -68,7 +68,7 @@ protected function getFields(): array
         $fields = [];
         foreach (get_object_vars($this) as $field) {
             if ($field instanceof FieldInterface) {
-                $fields[$field->getName()] = $field;
+                $fields[$field->getName()] = clone $field;
             }
         }
         return $fields;

tests/RediSearch/IndexTest.php

@@ -502,4 +502,22 @@ public function testSetStopWordsOnCreateIndex()
         $result = $this->subject->search('Jack');
         $this->assertEquals(1, $result->getCount());
     }
+
+    public function testShouldNotChangeOriginalSchemaFieldWhenAddingNewDocument()
+    {
+        $expectedId = 'id1';
+        $expectedTitle = 'Foo';
+        $documents = [];
+        $newDocument = $this->subject->makeDocument();
+        $newDocument->setId($expectedId);
+        $newDocument->title->setValue($expectedTitle);
+        $documents[] = $newDocument;
+
+        $barDocument = $this->subject->makeDocument();
+        $barDocument->setId('id2');
+        $barDocument->title->setValue('Bar');
+
+        $this->assertEquals($expectedId, $documents[0]->getId());
+        $this->assertEquals($expectedTitle, $documents[0]->title->getValue());
+    }
 }