AttributeError: 'SQLAlchemy' object has no attribute 'datetime'

Question

Im following a youtube tutorial on using Flask and when i run this code by using python -m flask run it shows this AttributeError: 'SQLAlchemy' object has no attribute 'datetime'. How can I fix it?

from flask import Flask, render_template, url_for
from flask_sqlalchemy import SQLAlchemy

from datetime import datetime as dt

app = Flask(__name__)
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///test.db'
db = SQLAlchemy(app)

class Todo(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    content = db.Column(db.String(200), nullable=False)
    date_created = db.Column(db.datetime, default=datetime.utcnow)

    def __repr__(self):
        return '<Task %r' % self.id

@app.route('/')
def index():
    return render_template('index.html')

if __name__ == "__main__":
    app.run(debug=True)

Answer 1

Column types are classes and capitalized. Try this:

db.Column(db.DateTime, default=datetime.utcnow)

Notice DateTime, not datetime.