Trying to create a simple DocGridEditor based on something we used to do in Umbraco 7

Simple Button Element

I am currently getting this error

Umbraco.Web.Mvc.ModelBindingException: Cannot bind source type 
Test.Infrastructure.DocumentTypes.GeneratedModels.Button to model type 
Umbraco.Core.Models.PublishedContent.IPublishedContent.
 at Umbraco.Web.Mvc.ContentModelBinder.ThrowModelBindingException(Boolean sourceContent, Boolean modelContent, Type sourceType, Type modelType) in d:\a\1\s\src\Umbraco.Web\Mvc\ContentModelBinder.cs:line 156
 at Umbraco.Web.Mvc.ContentModelBinder.BindModel(Object source, Type modelType) in d:\a\1\s\src\Umbraco.Web\Mvc\ContentModelBinder.cs:line 119
 at Umbraco.Web.Mvc.UmbracoViewPage`1.SetViewData(ViewDataDictionary viewData) in d:\a\1\s\src\Umbraco.Web\Mvc\UmbracoViewPageOfTModel.cs:line 152
 at System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance)
 at System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer)
 at Umbraco.Web.Mvc.ProfilingView.Render(ViewContext viewContext, TextWriter writer) in d:\a\1\s\src\Umbraco.Web\Mvc\ProfilingView.cs:line 25
 at System.Web.Mvc.HtmlHelper.RenderPartialInternal(String partialViewName, ViewDataDictionary viewData, Object model, TextWriter writer, ViewEngineCollection viewEngineCollection)
 at System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model, ViewDataDictionary viewData)
 at Our.Umbraco.DocTypeGridEditor.Web.Extensions.HtmlHelperExtensions.RenderDocTypeGridEditorItem(HtmlHelper helper, IPublishedElement content, String editorAlias, String viewPath, String previewViewPath, Boolean isPreview)
 at ASP._Page_app_plugins_doctypegrideditor_render_DocTypeGridEditor_cshtml.Execute() in C:\Projects\Test\src\Presentation\Test.Web\app_plugins\doctypegrideditor\render\DocTypeGridEditor.cshtml:line 28
 at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
 at System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
 at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage)
 at System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance)
 at System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer)
at Umbraco.Web.Mvc.ProfilingView.Render(ViewContext viewContext, TextWriter writer) in d:\a\1\s\src\Umbraco.Web\Mvc\ProfilingView.cs:line 25
at System.Web.Mvc.HtmlHelper.RenderPartialInternal(String partialViewName, ViewDataDictionary viewData, Object model, TextWriter writer, ViewEngineCollection viewEngineCollection)
at System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model, ViewDataDictionary viewData)
at System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model)
at ASP._Page_Views_Partials_grid_editors_Base_cshtml.Execute() in C:\Projects\Test\src\Presentation\Test.Web\Views\Partials\grid\editors\Base.cshtml:line 20

grid.editors.config.js

{
    "name": "Button",
    "alias": "button",
    "view": "/App_Plugins/DocTypeGridEditor/Views/doctypegrideditor.html",
    "render": "/App_Plugins/DocTypeGridEditor/Render/DocTypeGridEditor.cshtml",
    "icon": "icon-link color-blue",
    "config": {
        "allowedDocTypes": ["button"],
        "nameTemplate": "",
        "enablePreview": true,
        "viewPath": "/Views/Partials/Grid/Editors/DocTypeGridEditor/",
        "previewViewPath": "/Views/Partials/Grid/Editors/DocTypeGridEditor/",
        "previewCssFilePath": "",
        "previewJsFilePath": ""
    }
}

Grid/Editors/DocTypeGridEditor/Button

@inherits Umbraco.Web.Mvc.UmbracoViewPage
@{
Layout = "_DefaultDocTypeGridEditorLayout.cshtml";
}

Grid/Editors/DocTypeGridEditor/_DefaultDocTypeGridEditorLayout

@inherits UmbracoViewPage<IPublishedElement>
@{
    Layout = "_DocTypeGridEditorLayout.cshtml";
   }
 @Html.Action("RenderPartial", Model.ContentType.Alias, new { content = Model })@RenderBody()

Grid/Editors/DocTypeGridEditor/_DocTypeGridEditorLayout

@using System.Web.Configuration
@using Test.Infrastructure.DocumentTypes.GeneratedModels

@using Umbraco.Core.Logging
@inherits UmbracoViewPage<IPublishedElement>

@{
var compilationSection = System.Configuration.ConfigurationManager
    .GetSection(@"system.web/compilation") as CompilationSection;
var isDebugEnabled = compilationSection?.Debug
                     ?? false;
}

@if (Request.QueryString["dtgePreview"] == "1")
{

var blockCssScope = Model.ContentType.Alias;

<div class="umbraco-backend-scope @blockCssScope">
    @RenderBody()
</div>

<script>
    // unwraps the noscripts to display the images.        
    $(".umbraco-backend-scope.@blockCssScope noscript")
        .each(function(){
            var noScript = $(this);
            noScript.replaceWith(noScript.text());
        });

    // Set the iFrame src as the data-src, this was done to allow cookiebot to work properly!
    $("[email protected] iFrame")
        .each(function(){
            var iFrame = $(this);
            var dataSrc = iFrame.attr("data-src");
            if(dataSrc)
                iFrame.attr("src", dataSrc);
        });
</script>
}
else
{
try
{
    @RenderBody()
}
catch (Exception e)
{


    if (isDebugEnabled)
    {
        throw;
    }
}

}

Views/Partials/Button

@model Test.Feature.Blocks.Button.ButtonModel

@{
     var test = Model.CurrentPage as Button;

  }

 @if (test.ButtonLink !=null)
 {
<div class="section full-width">
    <div class="container-fluid">
        <div class="row">
            <div class="general-link-promo-container">
                @Html.SafeAnchor(test.ButtonLink, innerText:test.ButtonText, @class: "btn")
            </div>
        </div>
    </div>
</div>
}

ButtonController

public class ButtonController : DocTypeGridEditorSurfaceController
{
    public ActionResult RenderPartial(Button content)
    {
        var model = new ButtonModel(content)

        return PartialView("~/Views/Partials/Blocks/Button.cshtml", model);
    }
}

ButtonModel Derives from PublishedElementModel

Generated Button Model

namespace Test.DocumentTypes.GeneratedModels
{
/// <summary>Button</summary>
[PublishedModel("button")]
public partial class Button : PublishedElementModel
{
    // helpers
  #pragma warning disable 0109 // new is redundant
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Umbraco.ModelsBuilder", "8.1.0")]
    public new const string ModelTypeAlias = "button";
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Umbraco.ModelsBuilder", "8.1.0")]
    public new const PublishedItemType ModelItemType = PublishedItemType.Content;
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Umbraco.ModelsBuilder", "8.1.0")]
    public new static IPublishedContentType GetModelContentType()
        => PublishedModelUtility.GetModelContentType(ModelItemType, ModelTypeAlias);
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Umbraco.ModelsBuilder", "8.1.0")]
    public static IPublishedPropertyType GetModelPropertyType<TValue>(Expression<Func<Button, TValue>> selector)
        => PublishedModelUtility.GetModelPropertyType(GetModelContentType(), selector);
#pragma warning restore 0109

    // ctor
    public Button(IPublishedElement content)
        : base(content)
    { }

    // properties

    ///<summary>
    /// Button Link
    ///</summary>
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Umbraco.ModelsBuilder", "8.1.0")]
    [ImplementPropertyType("buttonLink")]
    public Umbraco.Web.Models.Link ButtonLink => this.Value<Umbraco.Web.Models.Link>("buttonLink");

    ///<summary>
    /// Button Text
    ///</summary>
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Umbraco.ModelsBuilder", "8.1.0")]
    [ImplementPropertyType("buttonText")]
    public string ButtonText => this.Value<string>("buttonText");
}
}