From ce2be53cc917b6973d0a31d8901908ca6ff847ff Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A1ra=20El-Saig?= <sara.el-saig@lombiq.com>
Date: Fri, 9 Aug 2024 15:04:25 +0200
Subject: [PATCH] Add AddModelError.

---
 .../Contents/BuildEditorContextExtensions.cs             | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Lombiq.HelpfulLibraries.OrchardCore/Contents/BuildEditorContextExtensions.cs b/Lombiq.HelpfulLibraries.OrchardCore/Contents/BuildEditorContextExtensions.cs
index c9d05eff..d88de992 100644
--- a/Lombiq.HelpfulLibraries.OrchardCore/Contents/BuildEditorContextExtensions.cs
+++ b/Lombiq.HelpfulLibraries.OrchardCore/Contents/BuildEditorContextExtensions.cs
@@ -1,6 +1,8 @@
 #nullable enable
 
+using Microsoft.Extensions.Localization;
 using OrchardCore.DisplayManagement.Entities;
+using OrchardCore.DisplayManagement.ModelBinding;
 using System;
 using System.Threading.Tasks;
 
@@ -71,4 +73,11 @@ public static async Task<TViewModel> CreateModelAsync<TViewModel>(this BuildEdit
         await context.Updater.TryUpdateModelAsync(viewModel, prefix);
         return viewModel;
     }
+
+    /// <summary>
+    /// Adds an error message to the <see cref="BuildShapeContext.Updater"/>.<see cref="IUpdateModel.ModelState"/>. The
+    /// <paramref name="message"/> is <see cref="LocalizedString"/>, because it's user-facing data.
+    /// </summary>
+    public static void AddModelError(this BuildEditorContext context, string key, LocalizedString message) =>
+        context.Updater.ModelState.AddModelError(key, message);
 }