[SQLObject] defining 1 to many relationships

[<jo...@cy...>]

Dear Group,

i just started looking at SQLObject and i ahve a question.  I am trying to see if it will work with a database that I already have developed with data in MySQL.  I have two tables images and di (donating investigator) and there is a 1 to many relationship between di and images.  The images table contains a field called source_di which links to the di id field which is also the key for the di table. i defined the table classes like this:

class Images(SQLObject):
    _idName = 'uin'
    _fromDatabase  = True
    sourceDi = ForeignKey('Di')

class Di(SQLObject):
    _fromDatabase = True
    _idName = 'id'
    Images = ForeignKey('Images')


When I try and run

images = Images.select()
for i in images:
    print i.uin

but this does not work, and the error message says that there is no column called imags.source_di_id

am I out of luck unless I want to redesign the database?

Thanks for any and all help

Jose