silverstripe RestfulServer Module - get related records with all attributes - rest

Question

Using the Restful Server Module I do this operation:
GET /api/v1/(ClassName)?(Field)=(Val)&(Field)=(Val) - searches for matching database records
The api should get the urls of all images related to a certain product like this:
http://domain.com/api/v1/Product?ArticleID=myID
unfortunately the returned XML does not show the full information of the ProductImages. just the attributes href and id.
here the xml:
<?xml version="1.0" encoding="UTF-8"?>
<ArrayList totalSize="1">
<Product href="http://domain.com/api/v1/Product/9.xml">
<ArticleID>myID</ArticleID>
<ID>9</ID>
<ProductImages linktype="has_many" href="http://domain.com/api/v1/Product/9/ProductImages.xml">
<ProductImage href="http://domain.com/api/v1/ProductImage/265.xml" id="265"/>
<ProductImage href="http://domain.com/api/v1/ProductImage/268.xml" id="268"/>
<ProductImage href="http://domain.com/api/v1/ProductImage/271.xml" id="271"/>
</ProductImages>
</Product>
</ArrayList>
ProductImage has much more attributes actually which are not displayed in the xml. How to make them visible? I can see all ProductImage Attributes when doing e.g. this:
http://domain.com/api/v1/Product/9/ProductImages
I use curl to load the urls.
In the worst case I think I have to take the ProductImage urls from the XML (e.g. http://domain.com/api/v1/ProductImage/271.xml) and do multiple calls.
many thx for any help,
florian

Answer 1

You need to increase the relationDepth inside RestfulServer. You can do that by passing in the relationdepth query string parameter.
As an aside, the reason it works like this is to keep the load low on the server by not having to instantiate all the image objects. It also means bandwidth is slightly lower too.