ORM properties can be named differently to the underlying columns: https://docs.sqlalchemy.org/en/13/orm/mapping_columns.html#naming-columns-distinctly-from-attribute-names
You could also create a TypeDecorator which converts to and from the pandas datatypes as the values are retrieved from and saved back to the database: https://docs.sqlalchemy.org/en/13/core/custom_types.html#augmenting-existing-types Hope that helps, Simon On Fri, Sep 13, 2019 at 3:46 PM Gary L <[email protected]> wrote: > > I have a declarative model as below > > > class User(Base): > __tablename__ = 'users' > __table_args__ = { > 'schema':'internal', > 'extend_existing': True, > 'mustexist': True > } > > > The table has a column named 'registration_date'. Since I am working with > pandas I'd like to wrap this in a pandas timestamp when using it. > Ideally something like this would be possible: > > def registration_date(self): > return pd.to_datetime(self.registration_date) > > But this causes a name collision between the mapped column and this new > method so trying to query the column via User.registration_date will not work > as this returns the method instead of the queryable attribute. The natural > solution would be to rename the method but that isn't ideal as I want all my > users to have the same idea of a registration date. Is this possible in > sqlalchemy? > > -- > SQLAlchemy - > The Python SQL Toolkit and Object Relational Mapper > > http://www.sqlalchemy.org/ > > To post example code, please provide an MCVE: Minimal, Complete, and > Verifiable Example. See http://stackoverflow.com/help/mcve for a full > description. > --- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sqlalchemy/b7cd73e2-a69b-44e9-b2fa-bdc302c4b7f6%40googlegroups.com. -- SQLAlchemy - The Python SQL Toolkit and Object Relational Mapper http://www.sqlalchemy.org/ To post example code, please provide an MCVE: Minimal, Complete, and Verifiable Example. See http://stackoverflow.com/help/mcve for a full description. --- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/sqlalchemy/CAFHwexfbmj%3D9zmemNPwXJ5%3DhRuCLRTLP2eP6zxvfqo45EYS6rA%40mail.gmail.com.
