Flask-SQLAlchemy: How to change table structure?

I have a table model in a flask application:

class Article(db.Model):
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    title = db.Column(db.String(80), nullable=False)
    body = db.Column(db.Text, nullable=False)
    pubDate = db.Column(db.DateTime, nullable=False, default=datetime.datetime.now())

And I use db.crate_all() and db.add()/db.session to add some data to the above table, work well!

Then I want to update and add some properties of class Article:

class Article(db.Model):
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    title = db.Column(db.String(80), nullable=False)
    body = db.Column(db.Text, nullable=False)
    createDate = db.Column(db.DateTime, nullable=False, default=datetime.datetime.now())
    touchDate = db.Column(db.DateTime, nullable=False, default=datetime.datetime.now())
    publishDate = db.Column(db.DateTime, nullable=False, default=datetime.datetime.now())
    isVisible = db.Column(db.Boolean, nullable=False, default=True)
    isDraft = db.Column(db.Boolean, nullable=False, default=True)

After I update the class Article, I use db.create_all() again. When I run my flask application, I got following error message:

cursor.execute(statement, parameters)
sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) no such column: article.createDate
[SQL: SELECT article.id AS article_id, article.title AS article_title, article.body AS article_body, article."createDate" AS "article_createDate", article."touchDate" AS "article_touchDate", article."publishDate" AS "article_publishDate", article."isVisible" AS "article_isVisible", article."isDraft" AS "article_isDraft" 
FROM article 
WHERE article."isVisible" = 1]

Whenever I change the db.Model subclass, does the table in database sync automatically? What operation is needed after the properties of db.Model subclass change?

For an industrial-strength solution, Flask-Migrate is an extension that handles SQLAlchemy database migrations for Flask applications using Alembic.

Alembic is a database migration tool written by the author of SQLAlchemy. A migrations tool offers the following functionality:

• Can emit ALTER statements to a database in order to change the structure of tables and other constructs
• Provides a system whereby “migration scripts” may be constructed; each script indicates a particular series of steps that can “upgrade” a target database to a new version, and optionally a series of steps that can “downgrade” similarly, doing the same steps in reverse.
• Allows the scripts to execute in some sequential manner.

It is also possible to execute raw SQL ALTER TABLE statements.

See How to execute raw SQL in Flask-SQLAlchemy app