Can't use child alias with conditional

[jfeust]

The following works as it should with the conditional:

collection @publish_times
child(:task, :if => lambda { |publish_time| publish_time.task_id.present? }) do
    extends "api/tasks/task"
end

But as soon as I try to alias the child object it throws an error:

# remove the alias (:todo) or the conditional (:if) and this works
collection @publish_times
child(:task => :todo, :if => lambda { |publish_time| publish_time.task_id.present? }) do
    extends "api/tasks/task"
end

Error:

ActionView::Template::Error (undefined method `card_image' for :task:Symbol):

Where "card_image" is a method call on the task in _task.json.rabl

[roelbondoc]

This should work (wrap the child and alias in braces):

child({:task => :todo}, :if => lambda { |publish_time| publish_time.task_id.present? }) do
    extends "api/tasks/task"
end