I have a table 'test' that defines a column 'col'. I map this table on:

class Mapper(object):
   @property
   def col(self):
     return u"Some read-only value."

passing exclude_properties=('col',).

However, when I save and commit an instance of Mapper, I get:

[snip]

UnmappedColumnError: No column test.col is configured on mapper Mapper...

This is on SQLAlchemy 0.4.6.

\malthe


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