On Tue, Apr 11, 2023, at 9:17 PM, Luis Del Rio IV wrote: > The sql query itself returns several rows, as it should. But when trying to > combine the max using sqlalchemy the rows return as the following. > > Received incompatible instance \"(<server.db.models.Data object at > 0x7f2c6cfd6670>, '2021-04-10 18', Decimal('7294.00000'))\".",
that's not a SQLAlchemy error. I would again suggest you get help from the maintainers of the library you're using. > > Here I am able to get the max for that row group, but am unable to pass it > into the DataModel object > > On Tuesday, April 11, 2023 at 4:59:15 PM UTC-7 S Mahabl wrote: >> Do you get many rows? >> >> SELECT date_format(data.timestamp, "%Y-%m-%d %H"), max(data.value) AS >> data_value >> from data >> GROUP BY date_format(data.timestamp, "%Y-%m-%d %H") >> On Tue, Apr 11, 2023 at 4:24 PM Luis Del Rio IV <lu...@colovore.com> wrote: >>> Hello, >>> >>> I am currently using the following sqlalchemy code, >>> >>> _query = super().get_query(model, info, sort, **args) >>> query = _query.group_by( >>> func.date_format(DataModel.timestamp, "%Y-%m-%d %H") >>> ) >>> return query >>> >>> I am trying to aggregate the the max value of a field from DataModel.value >>> utilizing the group by clause. >>> >>> In simple sql, you would do the following. >>> >>> SELECT max(data.value) AS data_value >>> from data >>> GROUP BY date_format(data.timestamp, "%Y-%m-%d %H") >>> >>> What would the proper way to express this? The various methods I have tried >>> somehow overwrite the original query and do not map to our attributes. >>> >>> >>> -- >>> 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+...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/sqlalchemy/a73c1830-8c64-437a-8ea7-a171767e2223n%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/sqlalchemy/a73c1830-8c64-437a-8ea7-a171767e2223n%40googlegroups.com?utm_medium=email&utm_source=footer>. > > > -- > 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 view this discussion on the web visit > https://groups.google.com/d/msgid/sqlalchemy/3eeda16b-9c36-4ca5-91b5-cba325343fban%40googlegroups.com > > <https://groups.google.com/d/msgid/sqlalchemy/3eeda16b-9c36-4ca5-91b5-cba325343fban%40googlegroups.com?utm_medium=email&utm_source=footer>. -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/sqlalchemy/ee62e370-b0c1-4656-95e2-4ecbcf4791e7%40app.fastmail.com.