Association :through with :source ends up renaming the node

[jifka]

In my model, I have Products and ProductUnits. A product has many ProductUnits associated with it. Since I need some attributes on the relationship, I've created a ProductComponent model which points to a single ProductUnit and associate Products to ProductUnits through the ProductComponent. Here are the associations in the Product class:

has_many :product_components
has_many :units, :through => :product_components, :source => :product_unit

This says that calling someprod.units returns a list of ProductUnit instances and prod.product_components returns a list of ProductComponent instances.

So in RABL, I defined a product like so...

object @prod
attributes :id, :active, :name, :description

child :units do
  attributes :id, :name
end

When I look at the resultant JSON, there's no .units array hanging off the product. So, what does it look like?

{
  id:1, active:true, name:"prodname", description:"this is a product",
  product_units:[
    {id:9, name:"some unit"}
  ]
}

Yes, an association :through, using a :source type, ends up rendering to the source's class name instead of what you've defined in the child node in RABL. But I found that using an alias works...but it looks funny:

child :units => :units do
  ...
end

This workaround....er...works, but it seems unnecessary. I'd think that the association name would be preserved. Am I thinking about this incorrectly?