So I have a model like so:

class PlacementData
store_in collection: 'events' , database: 'dev'
field :pid, type: Integer
field :eventData, type: Hash
field :primary, type: Hash
....
end

In rails console, the following was working in Mongoid v3
> PlacementData.where(pid: 1).first.eventData
But after updating mongoid to 5.1.1 I get the following error:

Missing attribute

I managed to dirty mix fix it by creating this method:

def eventData
self.attributes['eventData']
end

but Im quite annoyed I cant call eventData on a placement_data instance like I used to. You guys have any idea what could be wrong?