Second cascading dropdown id not picking up correct selected Id for the third one

[DoomerDGR8]

Hi!

I have the following setup:

CsHtml:

	<div class="row mt-3">
		<div class="col-lg-4">
			@(Html.Kendo().DropDownListFor(m => m.CategoryHeadId)
			      .Size(ComponentSize.Medium)
				  .Rounded(Rounded.Medium)
				  .FillMode(FillMode.Solid)
				  .OptionLabel("Select head category...")
				  .HtmlAttributes(new { style = "width: 100%" })
				  .DataTextField("Name")
				  .DataValueField("Id")
				  .DataSource(source =>
				  {
					  source.Read(read =>
					  {
						  read.Action("GetLookupCategoriesHead", "Api");
					  });
				  })
				)
		</div>
		<div class="col-lg-4">
			@(Html.Kendo().DropDownListFor(m => m.CategoryMainId)
			      .Size(ComponentSize.Medium)
				.Rounded(Rounded.Medium)
				.FillMode(FillMode.Solid)
				.OptionLabel("Select main category...")
				.HtmlAttributes(new { style = "width: 100%" })
				.DataTextField("Name")
				.DataValueField("Id")
				.DataSource(source =>
				{
					source.Read(read =>
					{
						read.Action("GetLookupCategoriesMain", "Api")
						    .Data("filterMainCategories");
					})
					.ServerFiltering(true);
				})
				.Enable(false)
				.AutoBind(false)
				.CascadeFrom("CategoryHeadId")
				)
		</div>
		<div class="col-lg-4">
			@(Html.Kendo().DropDownListFor(m => m.CategorySubId)
				.Size(ComponentSize.Medium)
				.Rounded(Rounded.Medium)
				.FillMode(FillMode.Solid)
				.OptionLabel("Select sub-category...")
				.HtmlAttributes(new { style = "width: 100%" })
				.DataTextField("Name")
				.DataValueField("Id")
				.DataSource(source =>
				{
					source.Read(read =>
					{
						read.Action("GetLookupCategoriesSub", "Api")
						    .Data("filterSubCategories");
					})
					.ServerFiltering(true);
				})
				.Enable(false)
				.AutoBind(false)
				.CascadeFrom("CategoryMainId")
				)
		</div>
	</div>

Script:

@section Scripts {
	<script>
		function filterMainCategories() {
			return {
				headId: $("#CategoryHeadId").val()
			};
		}

		function filterSubCategories() {
			return {
				headId: $("#CategoryHeadId").val(),
				mainId: $("#CategoryMainId").val()
			};
		}
	</script>
}

Controller:

    public async Task<JsonResult> GetLookupCategoriesHead()
    {
        var result = await serviceLookUps.GetAllCategoriesHeadAsync();
        return new JsonResult(result);
    }

    public async Task<JsonResult> GetLookupCategoriesMain(int headId)
    {
        var result = await serviceLookUps.GetAllCategoriesMainAsync(headId);
        return new JsonResult(result);
    }

    public async Task<JsonResult> GetLookupCategoriesSub(int headId, int mainId)
    {
        var result = await serviceLookUps.GetAllCategoriesSubAsync(headId, mainId);
        return new JsonResult(result);
    }

Model:

[DebuggerDisplay($"{nameof(Id)}: {{{nameof(Id)},nq}}, {nameof(Name)}: {{{nameof(Name)}}}, {nameof(Active)}: {{{nameof(Active)}}}")]
public class LookupCategoryHeadModel
{
    public int    Id     { get; set; }
    public string Name   { get; set; } = string.Empty;
    public bool   Active { get; set; }
}

[DebuggerDisplay($"{nameof(Id)}: {{{nameof(Id)},nq}}, {nameof(Name)}: {{{nameof(Name)}}}, {nameof(Active)}: {{{nameof(Active)}}}")]
public class LookupCategoryMainModel
{
    public int    Id     { get; set; }
    public int    HeadId { get; set; }
    public string Name   { get; set; } = string.Empty;
    public bool   Active { get; set; }
}

[DebuggerDisplay($"{nameof(Id)}: {{{nameof(Id)},nq}}, {nameof(Name)}: {{{nameof(Name)}}}, {nameof(Active)}: {{{nameof(Active)}}}")]
public class LookupCategorySubModel
{
    public int    Id     { get; set; }
    public int    HeadId { get; set; }
    public int    MainId { get; set; }
    public string Name   { get; set; } = string.Empty;
    public bool   Active { get; set; }
}

Issue:

I have tested the API methods separately through tests and ensured they are returning values. The only issue is, when I make a selection in the second dropdown, on the API, the second parameter is received as 0 instead of a correct selected value. This doesn't cause any console errors so the UI continues to work. I can cascade from dropdown one to dropdown two but dropdown two sends a 0 for mainId from its filtering operation in filterSubCategories()

[DoomerDGR8]

Hold up!

There is an error in the data coming from my staging API. THis is not an issue.