Rails - Dec 2010 - ActiveRecord serialize field and SerializationTypeMismatch

Hello.

In one of my ActiveRecord models I specified a a serialize field:
serialize :settings MyModelSettings

If I understand the documentation correctly this restricts settings to
the class MyModelSettings. The problem is that this is so restrictive
that I even don''t know how to initialize the field.

MyModel.new
or even
MyModel.new(:settings => MyModelSettings)

everything I do leads to

ActiveRecord::SerializationTypeMismatch: settings was supposed to be a
MyModelSettings, but was a String

Where is the correct place to initialize the settings (preferable
inside my model)?

Regards,
Kai

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