There is a "bug" in EntityDescriptor.setup_table in a section of code
which is adding column if polymorphic option is used. In my oppinion,
column shouldn't be added if it is already present. This way I can
manually create column and still use polymorphic.
For example:
if self.polymorphic and \
self.inheritance in ('single', 'multi') and \
self.children and not self.parent:
self.add_column(Column(self.polymorphic,
options.POLYMORPHIC_COL_TYPE))
Should be:
if self.polymorphic and \
self.inheritance in ('single', 'multi') and \
self.children and not self.parent and \
self.get_column(self.polymorphic, False) is None:
self.add_column(Column(self.polymorphic,
options.POLYMORPHIC_COL_TYPE))
Regards,
Tvrtko
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