From f2c75ebc9de33dfd46009aa378470ef14333532a Mon Sep 17 00:00:00 2001
From: Thomas Lallement <thomas.lallement@9online.fr>
Date: Thu, 11 Mar 2021 19:06:17 +0100
Subject: [PATCH] Fix Open API doc for DateTime requirements

When using the following requierement:

```
@Rest\QueryParam(name="updatedFrom", strict=true, nullable=true, requirements=@Constraints\DateTime("Y-m-d\TH:i:s"))
```

According to the OpenAPI 3.0 documentation https://swagger.io/specification/, we should have "format": "date-time" rather than "format": "DateTime" in the generated doc
---
 RouteDescriber/FosRestDescriber.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/RouteDescriber/FosRestDescriber.php b/RouteDescriber/FosRestDescriber.php
index 8f3e814..cc07217 100644
--- a/RouteDescriber/FosRestDescriber.php
+++ b/RouteDescriber/FosRestDescriber.php
@@ -18,6 +18,7 @@ use Nelmio\ApiDocBundle\OpenApiPhp\Util;
 use OpenApi\Annotations as OA;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Constraints\DateTime;
 use Symfony\Component\Validator\Constraints\Regex;
 
 final class FosRestDescriber implements RouteDescriberInterface
@@ -104,6 +105,11 @@ final class FosRestDescriber implements RouteDescriberInterface
     private function getFormat($requirements)
     {
         if ($requirements instanceof Constraint && !$requirements instanceof Regex) {
+            
+            if ($requirements instanceof DateTime) {
+                return 'date-time';
+            }
+            
             $reflectionClass = new \ReflectionClass($requirements);
 
             return $reflectionClass->getShortName();