Flask SQLAlchemy multiple column unique constraint

models.py

class ComponentCommit(db.Model):
    __tablename__ = 'component_version'
    __table_args__ = (
        db.UniqueConstraint('component_id', 'commit_id', name='unique_component_commit'),
    )
    id = db.Column(db.Integer, primary_key=True)
    component_id = db.Column(db.Integer, db.ForeignKey("component.id"))
    commit_id = db.Column(db.String)
    branch = db.Column(db.String)
    dependencies = db.Column(db.Text)
    created_date = db.Column(db.DateTime, default=datetime.datetime.utcnow)
    updated_date = db.Column(db.DateTime)