On Tue, Dec 19, 2017 at 3:02 AM, Tom Tanner <dontsendemailher...@gmail.com> wrote: > I'm using SQLAlchemy with the Python library Flask. > > How do I query an object from a database, make a copy of it, and save that > copy to the database? > > Example of querying an object. > someObj = db.session.query(SomeDataTable).filter_by(id=someID).first() > > > I want to save a copy of `someObj` to the table. How do I do this?
OK so "copy" we will take to mean, a new row in the table, with all the same data, *except* for the primary key, as that has to be different. The kind of primary key your object has is important here. Let's say it's a single integer "id" column that is generated from the database. You'd do this: from sqlalchemy.orm import make_transient make_transient(someObj) # someObj is no longer in the session del someObj.id # assume this is the primary key session.add(someObj) session.commit() if OTOH your object has a natural primary key (one that you set in python), then instead of "del someObj.id" you would assign a new primary key value to be used. that's it ! All you do is this: > > -- > 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. -- 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.
