MongoMapper and ActiveModel Serializers

[Benigno Hernández]

Hi,

I'm building a JSON API with Rails and it's my first time using MongoDB. I've created JSON APIs before using the gem "ActiveModel Serializers" (active_model_serializers). I'm getting the following error when trying to serialize a mongo record to JSON:

"undefined method `read_attribute_for_serialization' for #<MongoMapper::Plugins::Querying::DecoratedPluckyQuery"

Even when I included the following modules in my models:  "include ActiveModel::Serialization; include ActiveModel::SerializerSupport", I can't get rid off the error. I use ActiveModel Serializers because it's very simple to format the JSON responses from Rails.

Does anyone else has experienced this error? Am I doing it wrong trying to "serialize to JSON" a mongo document (that it's stored in JSON)?

Thank you in advance.