flask-sqlalchemy

How can I update parent timestamp when child table is modified? I would like to use parent table timestamp for checking if my rest client should update it's local version of these tables. class Parent(db.Model): id = db.Column(db.Integer, primary_key=True) version = db.Column(db.Integer) timestamp = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow) childs = db.relationship('Children', backref='parent', lazy='dynamic', cascade="all, delete-orphan") class Children(db.Model): id = db.Column(db.Integer, primary_key=True) version = db.Column(db.Integer) timestamp = db.Column

I'm trying to delete a child object from a many-to-many relationship in sql-alchemy. I keep getting the following error: StaleDataError: DELETE statement on table 'headings_locations' expected to delete 1 row(s); Only 2 were matched. I have looked at a number of the existing stackexchange questions ( SQLAlchemy DELETE Error caused by having a both lazy-load AND a dynamic version of the same relationship , SQLAlchemy StaleDataError on deleting items inserted via ORM sqlalchemy.orm.exc.StaleDataError , SQLAlchemy Attempting to Twice Delete Many to Many Secondary Relationship , Delete from Many

I'd like to run a query that selects all posts, case insensitive, that have titles that match '%' + [some_phrase] + '%' . That is, select all rows that have titles that contain some phrase, case insensitive. From the research I've done, it looks like I need to use Postgres's ILIKE query for it to match case insensitive. How can I execute a query like this with SQLAlchemy? class Post(db.Model): id = db.Column(db.Integer, primary_key = True) title = db.Column(db.String(250)) content = db.Column(db.String(5000)) I think it should work Post.query.filter(Post.title.ilike('%some_phrase%')) http:/