According the book I have added a field to a SQLFORM using the following 
code:

    form_chg_entity = SQLFORM(db.entity, showid=False, record = 
session.sif.id, deletable = False, fields= form_fields )
    option_conversations = [OPTION(conv.subject, _value=conv.id) for conv 
in db((db.conversation.entity==session.sif.id)
                                                                            
    &(db.conversation.community==session.com.id)
                                                                            
    ).select()]
    option_conversations.insert(0, OPTION("", _value=0))
    justify_entity = TR(LABEL('Change based on'),
                       SELECT(_name='conversation', *option_conversations))

    form_chg_entity[0].insert(-1, justify_entity)

However 

     if form_chg_entity.process(formname='change_entity').accepted:
           ....

Gives an error : 
<type 'exceptions.AttributeError'> 'Table' object has no attribute 
'conversation'
What is going wrong?

Richard D

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