On Wed, Sep 19, 2018 at 5:26 PM Alex Rothberg <agrothb...@gmail.com> wrote: > > Following up on > https://groups.google.com/forum/#!searchin/sqlalchemy/join_depth%7Csort:date/sqlalchemy/WstKKbEFaRo/hL910npaBQAJ > and > https://stackoverflow.com/questions/4381712/how-do-you-dynamically-adjust-the-recursion-depth-for-eager-loading-in-the-sqlal, > is there any way to set the join_depth on the query object rather than on > the relationship? > > Right now I have: > class Geography(db.Model): > id = db.Column(UUID, default=uuid.uuid4, primary_key=True) > name = db.Column(db.String(), nullable=False, unique=True) > parent_geography_id = db.Column(UUID, db.ForeignKey(id)) > children = db.relationship( > lambda: Geography, > lazy="joined", > join_depth=3, > backref=backref("parent", remote_side=[id]), > ) > > however if I would like to customize the join_depth on the query. > > A related issue is that if I then take Geography.query.options(raiseload("*", > sql_only=True)), the join_depth seems to be lost and I just get an exception. > Also printing the query when the options is set shows that the join_depth is > not used.
a loader option supersedes join_depth entirely, because you are setting it directly, e.g. query.options(joinedload(Geography.parent).joinedload(Geography.parent)) > > -- > 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.
