The second option looks perfect. Will try it! Thank you so much, Simon! On Friday, July 30, 2021 at 1:32:42 PM UTC-4 Simon King wrote:
> I can think of a couple of options: > > 1. Create a TypeDecorator for String and Text columns that raises an > error if it sees a bytestring. This will only flag the error when the > session is flushed. > 2. Listen for mapper_configured events, iterate over the mapper > properties and add an "AttributeEvents.set" listener for each one. > This should flag the error when a bytestring is assigned to a mapped > attribute. > > Hope that helps, > > Simon > > On Fri, Jul 30, 2021 at 5:10 PM 'Jonathan Vanasco' via sqlalchemy > <sqlal...@googlegroups.com> wrote: > > > > Mike, thanks for replying but go back to vacation. > > > > Anyone else: I am thinking more about an event that can be used to > catch, perhaps log, all bytes that go in. I only use a few column classes > that expect bytestrings, but many that do not. I've gotten every known bug > so far, but I'd like to make sure I'm not just lucky. > > > > On Thursday, July 29, 2021 at 6:05:03 PM UTC-4 Mike Bayer wrote: > >> > >> The Unicode datatype will emit a warning if you pass it a bytestring. > you can use that instead of String, or use a datatype with your own > assertions based on > https://docs.sqlalchemy.org/en/14/core/custom_types.html#coercing-encoded-strings-to-unicode > >> > >> > >> > >> On Thu, Jul 29, 2021, at 5:17 PM, 'Jonathan Vanasco' via sqlalchemy > wrote: > >> > >> I am finally at the tail end of migrating my largest (and hopefully > last) Python2 application to Python3. > >> > >> An issue that has popped up a lot during this transition, is when a py3 > bytestring gets submitted into SqlAlchemy. > >> > >> When that happens, it looks like SqlAlchemy just passes the value into > psycopg2, which wraps it in an object, and I get a psycopg exception that > bubbles up to SqlAlchemy: > >> > >> > sqlalchemy.exc.ProgrammingError: (psycopg2.errors.UndefinedFunction) > operator does not exist: character varying = bytea > >> > LINE 3: WHERE foo = '\x626337323133... > >> > HINT: No operator matches the given name and argument type(s). You > might need to add explicit type casts. > >> > .... > >> > WHERE foo = %(foo)s > >> > LIMIT %(param_1)s] > >> > [parameters: {'foo': <psycopg2.extensions.Binary object at > 0x10fe99060>, 'param_1': 1}] > >> > (Background on this error at: http://sqlalche.me/e/13/f405) > >> > >> Is there an easy way to catch this in SQLAlchemy *before* sending this > to the driver and executing it on the server? I'd like to ensure I'm > catching everything I should, and nothing is working just by-chance. > >> > >> > >> > >> > >> -- > >> 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/f70bf020-d120-46fb-96d1-d5509ff9b3c3n%40googlegroups.com > . > >> > >> > > -- > > 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/d6f8d50c-9465-41bc-a293-d8295c35ecc1n%40googlegroups.com > . > -- 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/51d32a79-136c-4ec3-9075-b3d1f098d629n%40googlegroups.com.
