Thanks a lot Mike! вт, 18 вер. 2018 о 16:07 Mike Bayer <mike...@zzzcomputing.com> пише:
> On Tue, Sep 18, 2018 at 7:07 AM Dmytro Starosud <d.staro...@gmail.com> > wrote: > > > > Hello group > > > > Please help me with the following. Imagine I have: > > > > @event.listens_for(Session, 'before_flush') > > def one(session, flush_context, instances): > > pass > > > > > > @event.listens_for(Session, 'before_flush') > > def two(session, flush_context, instances): > > pass > > > > > > I.e. two handlers for the same target/identifier are registered in a row. > > Will they be executed in the order they registered? > > Is this order actually strictly specified? > > Documentation link would be great, as I failed to find this in docs. > > The handlers are registered in order and are called in the order they > were registered. however it's not quite in the "spirit" of the event > system to rely upon this. For example, someone could someday be > refactoring your code above and then "two" gets placed above "one", > since these are two functions that don't have any obvious relationship > to each other. So I wouldn't recommend that pattern just from a > Python perspective. > > if you have two event handling functions with a dependency between > each other, it's much better to make this explicit in your code, and > do something like: > > @event.listens_for(Session, "before_flush") > def both(...): > one(...) > two(...) > > > > > > > Thanks a lot in advance! > > Best regards > > Dmytro > > > > > > -- > > 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. > -- 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.
