I was thinking about this overnight.. Do *values* relates specifically to inserts and updates, not selects/deletes perhaps, which would correlate to SQL syntax. If, it would make sense to indicate that in the documentation
On Thursday, 8 February 2018 20:29:45 UTC, Jeremy Flowers wrote: > > I've seen you can do things like this: > fields = ['jobmst_type', 'jobmst_name'] > print(session.query(Jobmst).options(load_only(*fields)).first()) > > But according to the documentation, you should be able to do something > with Query values() > <http://docs.sqlalchemy.org/en/latest/orm/query.html#sqlalchemy.orm.query.Query.values> > > too. > But once again I seem to be dumbfounded by the syntatic sugar. > > What data type does the list of values need? > *Is there a way to introspect that ahead of time?* > > Thought I was onto something with *.base_columns*, but that didn't work > either... > > I ended up with something like an instrumentalAttributes mismatch. > print(session.query(Jobmst) > .values([Jobmst.jobmst_type.base_columns, > Jobmst.jobmst_name.base_columns > ]) > .first() > ) > > sqlalchemy.exc.InvalidRequestError: SQL expression, column, or mapped > entity expected - got '[{Column('jobmst_type', Numeric(scale=0, > asdecimal=False), table=<jobmst>, nullable=False)}, {Column('jobmst_name', > String(length=256), table=<jobmst>, nullable=False)}]' > > BTW: I'm aware of querying with things like query(Jobmst.jobmst_type, > Jobmst.jobmst_name) too - but looking to understand what values expects. > Mike, Can documentation not specify type? > -- 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 sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at https://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
