I'm trying to use data from a sequence to add columns to a SQLAlchemy table
created declaratively. Here's what I'm doing:
class Sizing(Base):
__tablename__ = 'sizing'
id = Column(Integer, primary_key=True)
[...]
for name in ('column1', 'column2', 'column3', ...):
x = Column(type_=Integer)
x.name = name
Sizing.__table__.append_column(x)
This works as far as creating the table in the database, i.e. viewing the
database shows columns named column1, column2, column3, etc, but code like
getattr(sizing, 'column1') (sizing is an instance of Sizing) is failinging
with a message "'Sizing' object has no attribute 'column1'"
While code like:
Sizing.colum1 = Column(Integer)
works, but
Sizing.__dict__['column1'] = Column(Integer)
or
Sizing.__setattr__(Sizing, 'column1', Column(Integer))
fails
The reason I'm trying to use the sequence to create the colums is that data
from the sequence containing the column names is used in other parts of the
application and I'd like to maintain that data in just one place. It's okay if
I have to rebuild the database when the columns in the sequence change.
Thanks,
Mark
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