From 7b1865ade25be3494468e801880c6cde34366869 Mon Sep 17 00:00:00 2001
From: Oleg Shatin <mongoose0911@gmail.com>
Date: Mon, 23 Dec 2019 15:06:40 +0300
Subject: [PATCH] NRE for FromQuery fixed

Faced with NRE on `Apply` when some class passes as FromQuery param in controller action. Fixed.
```csharp
//controller
[HttpGet]
public IActionResult TestAction([FromQuery]SomeClass some)
 { return Ok(); }
...
//class
public class SomeClass
{  public string Value { get; set; } }
```
---
 .../Filters/XEnumNamesParameterFilter.cs                      | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Unchase.Swashbuckle.AspNetCore.Extensions/Filters/XEnumNamesParameterFilter.cs b/src/Unchase.Swashbuckle.AspNetCore.Extensions/Filters/XEnumNamesParameterFilter.cs
index afba2e5..eac3ddd 100644
--- a/src/Unchase.Swashbuckle.AspNetCore.Extensions/Filters/XEnumNamesParameterFilter.cs
+++ b/src/Unchase.Swashbuckle.AspNetCore.Extensions/Filters/XEnumNamesParameterFilter.cs
@@ -8,10 +8,10 @@ public class XEnumNamesParameterFilter : IParameterFilter
     {
         public void Apply(IParameter parameter, ParameterFilterContext context)
         {
-            var typeInfo = context.ParameterInfo.ParameterType;
+            var typeInfo = context.ParameterInfo?.ParameterType?? context.PropertyInfo.PropertyType;
             if (typeInfo.IsEnum)
             {
-                var names = Enum.GetNames(context.ParameterInfo.ParameterType);
+                var names = Enum.GetNames(typeInfo);
                 parameter.Extensions.Add("x-enumNames", names);
             }
             else if (typeInfo.IsGenericType && !parameter.Extensions.ContainsKey("x-enumNames"))