diff --git a/src/MaksIT.Core/Abstractions/Webapi/PatchRequestModelBase.cs b/src/MaksIT.Core/Abstractions/Webapi/PatchRequestModelBase.cs
new file mode 100644
index 0000000..fefe6c5
--- /dev/null
+++ b/src/MaksIT.Core/Abstractions/Webapi/PatchRequestModelBase.cs
@@ -0,0 +1,12 @@
+using System.Reflection;
+using MaksIT.Core.Webapi.Models;
+
+
+namespace MaksIT.Core.Abstractions.Webapi;
+
+public abstract class PatchRequestModelBase : RequestModelBase {
+  public bool HasNonNullPatchField => GetType()
+    .GetProperties(BindingFlags.Public | BindingFlags.Instance)
+    .Where(prop => prop.PropertyType.IsGenericType && prop.PropertyType.GetGenericTypeDefinition() == typeof(PatchField<>))
+    .Any(prop => prop.GetValue(this) != null);
+}
diff --git a/src/MaksIT.Core/MaksIT.Core.csproj b/src/MaksIT.Core/MaksIT.Core.csproj
index ab9b39a..3877777 100644
--- a/src/MaksIT.Core/MaksIT.Core.csproj
+++ b/src/MaksIT.Core/MaksIT.Core.csproj
@@ -8,7 +8,7 @@
 
     <!-- NuGet package metadata -->
     <PackageId>MaksIT.Core</PackageId>
-    <Version>1.1.8</Version>
+    <Version>1.1.9</Version>
     <Authors>Maksym Sadovnychyy</Authors>
     <Company>MAKS-IT</Company>
     <Product>MaksIT.Core</Product>
diff --git a/src/MaksIT.Core/Webapi/Models/PatchOperation.cs b/src/MaksIT.Core/Webapi/Models/PatchOperation.cs
index f1a1925..cd74a68 100644
--- a/src/MaksIT.Core/Webapi/Models/PatchOperation.cs
+++ b/src/MaksIT.Core/Webapi/Models/PatchOperation.cs
@@ -1,8 +1,24 @@
 namespace MaksIT.Core.Webapi.Models;
 
 public enum PatchOperation {
+
+  /// <summary>
+  /// When you need to replace some field, or relpace item in collection
+  /// </summary>
   Replace,
+
+  /// <summary>
+  /// When you need to set some field, or add item to collection
+  /// </summary>
   Add,
+
+  /// <summary>
+  /// When you need to set some field to null, or remove item from collection
+  /// </summary>
   Remove,
-  Clear // for collections
+
+  /// <summary>
+  /// When you need to clear collection
+  /// </summary>
+  Clear
 }