Singleton can't be dumped error
when passing an array of objects to a serializer, I’ve received an error which stated: Singleton can't be dumped
. To fix the issue I’ve created a presenter for a singleton object:
class StateTransitionPresenter
attr_reader :state_transition
def initialize(state_transition)
@state_transition = state_transition
end
def as_json(options = {})
{
state_transition_time: state_transition.time,
state: state_transition.state,
reason: state_transition.reason
}
end
end
and then I used it in the serializer:
order.state_transitions.map{ |state_transition| StateTransitionPresenter.new(state_transition)}.as_json
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