Hi all.

Using Umbraco CMS 10.5.1, we are getting html from a Content node, using ITemplateRenderer.RenderAsync to validate the html.

It fails if we are using a custom controller inherited by RenderController with a custom entity inherited by PublishedContentWrapped.

It does not initiate the RenderController at all. It's like its looking at the view and decide it cannot bind the models.

using (var stringWriter = new StringWriter())
{
    await _templateRenderer.RenderAsync(pageId: 1010, altTemplateId: null, writer: stringWriter);
    return stringWriter.ToString();
}

public class ListViewModel : PublishedContentWrapped
{
    public ListViewModel(IPublishedContent content, IPublishedValueFallback publishedValueFallback) : base(content, publishedValueFallback) { }

    public List<IPublishedContent>? Results { get; set; }

    public string? Query { get; set; }

    public IHtmlContent? Pagination { get; set; }
}

@inherits Umbraco.Cms.Web.Common.Views.UmbracoViewPage<ListViewModel>
@{
    Layout = "layout.cshtml";
}

<section>
    <div>
        @await Html.PartialAsync("results", Model)
        @if (Model.Pagination != null)
        {
            @Model.Pagination
        }
    </div>
</section>

The error we are getting is:

Umbraco.Cms.Web.Common.ModelBinders.ModelBindingException: 'Cannot bind source content type Umbraco.Cms.Web.Common.PublishedModels.PublicationsArea to model type xxx.xxx.xxx.ListViewModel. 
The source is a ModelsBuilder type, but the view model is not. The application is in an unstable state and should be restarted.'

Then if we disable the ModelsBuilder, then we get this error:

Umbraco.Cms.Web.Common.ModelBinders.ModelBindingException: 'Cannot bind source content type Umbraco.Cms.Infrastructure.PublishedCache.PublishedContent to model type xxx.xxx.xxx.ListViewModel.'

What are we missing?