Extra query parameter is ignore when rendering Glass Link

Question

I have a template that maps to the following Glass model.

[SitecoreType(AutoMap = true)]
public class MyGlassModel
{
    private Link link;

    public virtual Guid Id { get; set; }
    public virtual Link Link
    {
        get { return link; }
        set { link = AddDocumentParameter(value); }
    }

    [SitecoreField("Link text")]
    public virtual string LinkText { get; set; }

    public virtual Guid Document { get; set; }

    private  Link AddDocumentParameter(Link link)
    {
        if (!link.HasValue())
        {
            return link;
        }
        if (link.Query.Contains("doc"))
        {
            return link;
        }
        if (link.Query.Length != 0)
        {
            link.Query += "&";
        }
        link.Query += $"doc={Document}";
        return link;
    }
}

Everything is mapped well, and the doc-parameter is added to the Query property of the Link. Though when I render the link in my view, it's not added.

My view code:

@inherits GlassView<MyGlassModel>
<div class="btn-row">
    @using (BeginRenderLink(cta => cta.Link, isEditable: true, attributes: new { @class = "btn btn-primary" }))
    {
        @Editable(cta => cta.LinkText)
    }
</div>

This is what is being rendered though.
<a class="btn btn-primary scEnabledChrome" href="/nl?test=test" sc-part-of="field">

Why is this, and how can I add the doc-parameter?

---

Edit: This does seem to work, but not in the Experience Editor.
See <a href="/nl?test=test&doc=e39a4342-a209-423a-be1a-0578ec947dff" class="btn btn-primary">test</a>
I guess my question now is, why does this not work in the Experience editor?

Answer 1

I ran into a similar issue and brought it up with Sitecore Support. According to them there was a bug with the save functionality for links that had querystring parameters. I was provided a patch and have not had an issue since.

From Sitecore support: "When a link with ampersands is saved in Experience Editor, the ampersands in the raw value of the field are not encoded. This causes an error when the Insert Link dialog is opened again for this link (both in Content and Experience Editor)."

They provided reference number 87963 to track this issue but I have not looked into it to see if it's been included in newer releases. I was working with 8.1 update 2 (160302) at the time.

I would reach out to support and reference 87963 to see if they can provide a patch for your version, if it is the same issue.