As usage for XML serialization declined, it's become less of a core concern of Rails. In Rails 5, this feature will be moved to the activemodel-serializers-xml gem.
If you're still using the XML Serialization feature in your app, you will need to add this to your Gemfile when you upgrade.
That's a wrap
That's all for This week in Rails. As always, there are many more changes than we have room to cover here, but feel free to check them out yourself!
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