Filter in Sitecore Children in Sitecore

Question

I have this tree structure:

Page1
  PageA
    PageX
    PageY
  PageB
Page2

I want Page1 and Page2 as well as all child pages. I have created two classes. In one class using sitecore query

[SitecoreQuery("../*[@@templateid={GUID}]", IsRelative = true)]
public virtual IEnumerable<ItemModel> Links { get; set; }

In other ItemModel class getting child pages

public class ItemModel
{
    [SitecoreId]
    public Guid Id { get; set; }

    [SitecoreChildren]
    public IEnumerable<SideMenuModel> Children { get; set; }
}

This is working fine but now I want to get only those child pages who have some specific template. Please provide me some solution.

Answer 1

It looks like you have most of the code correct but you need to also apply restrictions to the Children property on the ItemModel class.

You can use a SitecoreQuery on the like you have on the parent model:

public class ItemModel
{
    [SitecoreId]
    public Guid Id { get; set; }

    [SitecoreQuery("./*[@@templateid={SideMenuModel-GUID}]", IsRelative = true)]
    public virtual IEnumerable<SideMenuModel> ChildItems { get; set; }
}

Or you can use the EnforceTemplate attribute on your SideMenuModel class:

[SitecoreType(TemplateId = "GUID", EnforceTemplate = SitecoreEnforceTemplate.Template)]
public class SideMenuModel
{
    [SitecoreId]
    public Guid Id { get; set; }
}

public class ItemModel
{
    [SitecoreId]
    public Guid Id { get; set; }

    [SitecoreChildren]
    public virtual IEnumerable<SideMenuModel> ChildItems { get; set; }
}

Since you have set EnforceTemplate then using the [SitecoreChildren] attribute means that only items matching the template id will be returned, otherwise they will be skipped.

If you need children of children mapped then you should add [SitecoreChildren] property on your SideMenuModel class as well (or refactor your code so the class references itself) or you could use a "get all descendants query (.//*[@@templateid={SideMenuModel-GUID}]) although I would recommend that you ur he Content Search API at this point instead.

You can read more in the blog post about Getting child items with Glass.