Polymorphic Models

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Mongo collections can contain documents of different shapes. Polymorphic models implement support for having multiple models in one collection. This comes with the following restrictions:

• The Collection name must be declared on the “root” polymorphic model.
• Each document has a “_type” associated with it that contains the model class name. By enabling the option “qualified_names” the full qualified class names will be used.
• On instantiation the Model tries to create an instance of the respective type (by checking its known subclasses). If no such type exists an error is raised.
• It is an error to mark a submodel of a polymorphic model as polymorphic as well.

Polymorphic models and abstract models can be combined.