Exception using SitecoreQuery to map children of a specific template

[Kyle Heon]

I used Tutorial 7 as a guide for this. I have the Sitecore Query syntax correctly working in the XPath Builder but when I add to my property and navigate to the page where I use this model I get the following error:

Could not find a data mapper to handle property AbstractPropertyConfiguration Property: Applications Type: Data.Models.Sitecore.Templates.UserDefined.Pages.SolutionPage Assembly: Data, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: Glass.Mapper.MapperException: Could not find a data mapper to handle property AbstractPropertyConfiguration Property: Applications Type: Data.Models.Sitecore.Templates.UserDefined.Pages.SolutionPage Assembly: Data, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null

My model class looks like this:

public partial class SolutionPage

{

    [SitecoreField(FieldName = ISectionPageConstants.PageAssetFieldName)]

    public MediaFile PageAssetMedia { get; set; }

    [SitecoreQuery("./*/*", IsRelative = true)]

    public IEnumerable<ICategoryPage> Categories { get; set; }

    [SitecoreQuery("./*/*[@@templatename='ApplicationPage']", IsRelative = true)]

    public List<ApplicationPage> Applications { get; set; }

    [SitecoreQuery("./*/*[@@templatename='ProductLinePage']", IsRelative = true)]

    public List<ProductLinePage> ProductLines { get; set; }

}

View code looks like this:

<h3>Applications</h3>

<ul>

    @foreach (var item in Model.Applications)

    {

        <li>@item.NavigationTitle</li>

    }

</ul> 

Anyone have some advise on what I'm doing wrong? Thanks!

-K 

[Michael Edwards]

Your return types are List<T> and not IEnumerable<T>, change them to IEnumerable<T>.

Mike

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[Kyle Heon]

Mike,

Funny you suggested that, I'd already made that change after posting this and still couldn't get it working. I tried with the interface and the concrete implementation within the IEnumerable.

I did manage to get this working but not via the attribute. This is working for me, not sure why the attribute won't but at least I have the data I need:

public partial interface ISolutionPage

{

    IEnumerable<IApplicationPage> Applications { get; set; }

    IEnumerable<IProductLinePage> ProductLines { get; set; }

}

public partial class SolutionPage

{

    [SitecoreField(FieldName = ISectionPageConstants.PageAssetFieldName)]

    public MediaFile PageAssetMedia { get; set; }

    [SitecoreQuery("./*/*", IsRelative = true)]

    public IEnumerable<ICategoryPage> Categories { get; set; }

    public IEnumerable<IApplicationPage> Applications { get; set; }

    public IEnumerable<IProductLinePage> ProductLines { get; set; }

    public SolutionPage()

    {

        var context = new SitecoreContext();

        Applications =

            context.QueryRelative<IApplicationPage>("./*/*[@@templateid='{533670B4-BA56-4AD9-9840-7E34E1E0ED94}']",

                                                    true, true);

        ProductLines =

            context.QueryRelative<IProductLinePage>("./*/*[@@templateid='{F183AD73-9DE6-4035-99EE-446166D94A6D}']",

                                                    true, true);

    }

}

Thanks! 

[Michael Edwards]

So the Categories property works ok but the other two don't?

You need to ensure also that you mark your properties as virtual.

Mike

[Kyle Heon]

Aha! I bet it was the missing virtual because this is working for me now:

public partial interface ISolutionPage

{

    [SitecoreQuery("./*/*[@@templateid='{533670B4-BA56-4AD9-9840-7E34E1E0ED94}']", InferType = true, IsLazy = true,

        IsRelative = true)]

    IEnumerable<IApplicationPage> Applications { get; set; }

    [SitecoreQuery("./*/*[@@templateid='{F183AD73-9DE6-4035-99EE-446166D94A6D}']", InferType = true, IsLazy = true,

        IsRelative = true)]

    IEnumerable<IProductLinePage> ProductLines { get; set; }

}

public partial class SolutionPage

{

    [SitecoreField(FieldName = ISectionPageConstants.PageAssetFieldName)]

    public MediaFile PageAssetMedia { get; set; }

    [SitecoreQuery("./*/*", IsRelative = true)]

    public IEnumerable<ICategoryPage> Categories { get; set; }

    [SitecoreQuery("./*/*[@@templateid='{533670B4-BA56-4AD9-9840-7E34E1E0ED94}']", InferType = true, IsLazy = true,

        IsRelative = true)]

    public virtual IEnumerable<IApplicationPage> Applications { get; set; }

    [SitecoreQuery("./*/*[@@templateid='{F183AD73-9DE6-4035-99EE-446166D94A6D}']", InferType = true, IsLazy = true,

        IsRelative = true)]

    public virtual IEnumerable<IProductLinePage> ProductLines { get; set; }

}

Thanks Mike, I knew it was something small I was missing.

-K