Hi,
I'm having trouble implementing a model whose 'id' column needs to be cast
to Integer type. Below is the implementation I've got so far:
class CastToIntegerType(types.TypeDecorator):
'''
Converts stored String values to Integer via CAST operation
'''
impl = types.Numeric
def column_expression(self, col):
return func.cast(col, Integer)
class Person(Base):
__tablename__ = "person"
id = Column('id_string', CastToIntegerType, primary_key=True)
Then when I run the query
>> person = Person.query.get(12345)
I see the following error:
sqlalchemy.exc.ProgrammingError: (ProgrammingError) operator does not
exist: text = integer
LINE 3: WHERE public.person.id_string = 12345
^
HINT: No operator matches the given name and argument type(s). You might
need to add explicit type casts.
Any ideas what I might be doing wrong?
Thanks!
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