How to delete a record by id in Flask-SQLAlchemy

python flask sqlalchemy flask-sqlalchemy
Sergey picture Sergey · Nov 26, 2014 · Viewed 122.9k times · Source

I have users table in my MySql database. This table has id, name and age fields.

How can I delete some record by id?

Now I use the following code:

user = User.query.get(id)
db.session.delete(user)
db.session.commit()

But I don't want to make any query before delete operation. Is there any way to do this? I know, I can use db.engine.execute("delete from users where id=..."), but I would like to use delete() method.

Answer

adarsh picture adarsh · Nov 26, 2014

You can do this,

User.query.filter_by(id=123).delete()

or

User.query.filter(User.id == 123).delete()

Make sure to commit for delete() to take effect.

Related questions

How to execute raw SQL in Flask-SQLAlchemy app

How do you execute raw SQL in SQLAlchemy? I have a python web app that runs on flask and interfaces to the database through SQLAlchemy. I need a way to run the raw SQL. The query involves multiple table joins …

Read More
jsonify a SQLAlchemy result set in Flask

I'm trying to jsonify a SQLAlchemy result set in Flask/Python. The Flask mailing list suggested the following method http://librelist.com/browser//flask/2011/2/16/jsonify-sqlalchemy-pagination-collection-result/#04a0754b63387f87e59dda564bde426e : return jsonify(json_list = qryresult) However I'm getting …

Read More
unable to create autoincrementing primary key with flask-sqlalchemy

I want my model's primary key to be an autoincrementing integer. Here is how my model looks like class Region(db.Model): __tablename__ = 'regions' id = db.Column(db.Integer, primary_key=True, autoincrement=True) name = db.Column(db.String(100)) parent_…

Read More