Drools guided editor gives error "Note: No model has been defined." How to define one?

I'm trying to follow along with the examples in the book "JBoss Drools Business Rules" (which, like most other Packt Publishing books, is a poorly edited mess of misspellings, bad edits, and errors).

The Drools UI has advanced a bit since this book was writt开发者_开发技巧en, so I can't follow along exactly.

I've uploaded a model as a jar file, and now want to define some rules.

I navigate to packages->models and find my model

Then, on the left hand side, I say "create new->New Rule->Business Rule (guided editor)"

I create the rule, then try to modify the "when" condition, and I get that error

Note: No model has been defined. Tip: You will want to import or define a model for this user interface to work !

and since it doesn't know about the model, this guided interface doesn't really do much good.

Does anyone out there know how this is supposed to work?

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Ok! I think I got it

If you select your package from the Guvnor UI LHS and click on it, you'll get a configuration menu that lets you select what uploaded jars to make available to things defined in that package.

I added the model jar I uploaded, and the rules editor stopped complaining....