I've got a simple User model, defined like so:
# models.py
from datetime import datetime
from myapp import db
class User(db.Model):
id = db.Column(db.Integer(), primary_key=True)
email = db.Column(db.String(100), unique=True)
password = db.Column(db.String(100))
date_updated = db.Column(db.DateTime())
def __init__(self, email, password, date_updated=None):
self.email = email
self.password = password
self.date_updated = datetime.utcnow()
When I create a new User object, my date_updated
field gets set to the current time. What I'd like to do is make it so that whenever I save changes to my User object my date_updated
field is set to the current time automatically.
I've scoured the documentation, but for the life of me I can't seem to find any references to this. I'm very new to SQLAlchemy, so I really have no prior experience to draw from.
Would love some feedback, thank you.
Just add server_default
or default
argument to the column fields:
created_on = db.Column(db.DateTime, server_default=db.func.now())
updated_on = db.Column(db.DateTime, server_default=db.func.now(), server_onupdate=db.func.now())
I prefer the {created,updated}_on
column names. ;)
SQLAlchemy docs about column insert/update defaults.
[Edit]: Updated code to use server_default
arguments in the code.
[Edit 2]: Replaced onupdate
with server_onupdate
arguments.