I also tried to add unique=True to the column message_id but still fail with the same error
On Tuesday, 7 December 2021 at 22:21:49 UTC Chaozy Z wrote: > Hi there, I just started to learn SQLAlchemy. 0 > <https://stackoverflow.com/posts/70266906/timeline> > > I have a `on_conflict_do_update` command as follows: > > ``` > > insert_stmt = insert(MessageSymbol).values(message_id=12345, symbol_id=1) > > do_update_stmt = insert_stmt.on_conflict_do_update( > index_elements=['message_id'], set_=dict( symbol_id=123 ) ) > > ``` > > and my MessageSymbol is defined as follow: > > ``` > > class MessageSymbol(Base): > > __tablename__ = "message_symbol" > > > message_id = Column(BigInteger, primary_key=True, nullable=False) > > > symbol_id = Column(BigInteger, nullable=False) > > ``` > > When the command is executed it throws the error: > > ``` > > sqlalchemy.exc.ProgrammingError: (psycopg2.errors.InvalidColumnReference) > there is no unique or exclusion constraint matching the ON CONFLICT > specification > > [SQL: INSERT INTO message_symbol (message_id, symbol_id) VALUES > (%(message_id)s, %(symbol_id)s) ON CONFLICT (message_id) DO UPDATE SET > symbol_id = %(param_1)s] > [parameters: {'message_id': 12345, 'symbol_id': 1, 'param_1': 123}] > > ``` > > Since I have defined the `message_id` as the primary key I assume it > should be a unique constraint. I am wondering what else is being missing? > > Chaozy > -- 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/734ae718-fde8-4b54-9de9-b2d81698a0dfn%40googlegroups.com.
