Store types implemented. OpenStruct store type implemented.

[Antiarchitect]

I think OpenStruct fits for serialization pretty well. So I've implemented support of store type generally and OpenStruct store type case.

[josevalim]

Thanks for the pull request. However instead of adding clauses to the current code, we should just assume that [] and []= is the API that one needs to implement in order to use Store. So while adding :type as an option is fine, the remaining changes are just adding conditions that should actually be simply using duck typing.

[Antiarchitect]

How about this approach? Have I understand you correctly?

[josevalim]

Yeah, you got me correctly. :) But I don't think we (Rails) should monkey patch OpenStruct. You can probably do that in your apps though. :)

[Antiarchitect]

Ok :) But OpenStruct is good for serialization anyway :)

[tenderlove]

This would probably be better as a third party gem for now. Thanks.

[jeremy]

Check out ActiveSupport::OrderedOptions for an OpenStruct-like hash.

[Antiarchitect]

Probably found a bug with OrderedHash and OrderedOptions deserialization type mismatch:

ActiveRecord::SerializationTypeMismatch: Attribute was supposed to be a ActiveSupport::OrderedOptions, but was a Psych::Omap

Look here #4072