SQLAlchemy update if unique key exists

Question

I\'ve got a class:

class Tag(Base, TimestampMixin):
    \"\"\"Tags\"\"\"
    __tablename__ = \'tags\'
    __table_args__ = {\'mysql_engine\' : \'InnoDB\', \'         


        

Answer 1

You can try this

def get_or_increase_tag(tag_name):
    tag = session.query(Tag).filter_by(tag=tag_name).first()
    if not tag:
       tag = Tag(tag_name)
    else:
       tag.cnt += 1
    return tag

You can check the link https://stackoverflow.com/search?q=Insert+on+duplicate+update+sqlalchemy