Hints for migration from 1.0 to 2.0

[Alex Rhomberg]

I'm trying to migrate to twig 2.0-RC due to a tiny bug with 1.0.4 with GAE SDK 1.7.5.

Some hints in the Wiki for the migration would be very useful, such as:

• Make sure you depend on guava 10.x, currently guava 11.x or later is not supported. Expection thrown is
  java.lang.IllegalAccessError: tried to access method com.google.common.collect.MapMaker.expireAfterWrite(JLjava/util/concurrent/TimeUnit;)Lcom/google/common/collect/MapMaker; from class com.google.code.twig.standard.StandardCommonFindCommand
• All persisted classes have to be registered using ObjectDatastoreFactory.register(Class<?> clazz). Otherwise an IllegalStateException is thrown. If you want to load the entities written with twig 1.0.4, add an @Entity(kind="old_generated_twig_name") annotation to the classes
• Change annotation @Key to @Id

[John Patterson]

Thanks, I expect to have more time to dedicate to Twig soon and will update the docs.

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[Alex Rhomberg]

Another hint is that you have to set @Index annotation on every field that you ever want to sort or filter.

This wasn't necessary in twig 1.0, right?