ActiveSupport to_json issue with STI
Reported by Greg Campbell | September 29th, 2010 @ 06:50 PM
Rails appears to have problems serializing a DataMapper STI model to JSON. The error is a ActiveSupport::JSON::Encoding::CircularReferenceError. Simple reproduction script (based on the one in ticket #1406) is attached.
Comments and changes to this ticket
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Postmodern September 29th, 2010 @ 10:03 PM
Did you try including "DataMapper::Serializer" into the model?
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Greg Campbell September 30th, 2010 @ 10:55 AM
I've found the problem, and am working on a patch now. The issue is that Discriminator properties have a Model class as their value, which as_json serializes as an array of all the instances of that model, which results in a circular reference. One fix (the current approach I'm taking) would be to explicitly handle Discriminator properties and call to_s on the class.
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Dan Kubb (dkubb) September 30th, 2010 @ 01:33 PM
- State changed from “unconfirmed” to “resolved”
(from [3201e94f64c433579aa99905d0e54c6da613183f]) Serialize Discriminator properties as Strings
Previously, Discriminator properties caused problems for ActiveSupport
to_json, as their values are generally DataMapper::Model instances,
which implement as_json as an array of all the models of that type.
This caused an ActiveSupport::JSON::Encoding::CircularReferenceError.[#1421 state:resolved] http://github.com/datamapper/dm-serializer/commit/3201e94f64c433579...
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Greg Campbell
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Referenced by
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1421
ActiveSupport to_json issue with STI
[#1421 state:resolved]
http://github.com/datamapper/dm-s...