So i'm trying to insert an array of jsonb values into my database but I 
can't seem to format it right, here's my code:

    updated_old_passwords = []
    updated_old_passwords.append({"index": 1, "password": hashed_password})
    user.old_passwords = updated_old_passwords
    user.last_password_reset = datetime.datetime.utcnow()
    db.session.commit()

And here's the error:

    ProgrammingError: (psycopg2.ProgrammingError) column "old_passwords" is 
of type jsonb[] but expression is of type text[]
    LINE 1: ...-01-05T06:18:24.992968'::timestamp, 
old_passwords=ARRAY['"\"...
                                                                 ^
    HINT:  You will need to rewrite or cast the expression.
     [SQL: 'UPDATE users SET password=%(password)s, 
last_password_reset=%(last_password_reset)s, 
old_passwords=%(old_passwords)s WHERE users.id = %(users_id)s'] 
[parameters: {'users_id': 1, 'password': 
'$6$rounds=656000$b.LVoVb7T0WNbT.n$l9uUb1a1qk2Z5ugfpI7B.3D02sUVqhES5VhM1TvwUnMd/iZZL3gn4/zExB47/ZQYPcTMRxO1iaL4/yjXda2.P1',
 
'last_password_reset': datetime.datetime(2017, 1, 5, 6, 18, 24, 992968), 
'old_passwords': ['"\\"{\\\\\\"index\\\\\\": 1, \\\\\\"password\\\\\\": 
hashed_password}\\""']}]

Any idea how I format my insert for this to work?

Here's my db table

    from sqlalchemy.dialects.postgresql import JSONB, ARRAY
    
    class User(db.Model):
        __tablename__ = 'users'
        id = db.Column(db.Integer, primary_key = True)
        email = db.Column(db.String(255), index = True)
        password = db.Column(db.String(255))
        last_password_reset = db.Column(db.DateTime())
        old_passwords = db.Column(ARRAY(JSONB))


I also tried this:

    updated_old_passwords.append(cast('{"index": 1, "password": 
hashed_password}', JSONB))

but got the error

    StatementError: (exceptions.TypeError) <sqlalchemy.sql.elements.Cast 
object at 0x10f3ed150> is not JSON serializable [SQL: u'UPDATE users SET 
password=%(password)s, last_password_reset=%(last_password_reset)s, 
old_passwords=%(old_passwords)s WHERE users.id = %(users_id)s'] 
[parameters: [{'users_id': 1, 'password': 
'$6$rounds=656000$WYOiWMAYDSag9QIX$YSDtZle6Bd7Kz.cy7ejWq1NqgME.xUPiDHfV31FKobGu2umxoX34.ZP2MrUDxyym0X4fyzZNEIO//yS6UTPoC.',
 
'last_password_reset': datetime.datetime(2017, 1, 5, 6, 26, 35, 610703), 
'old_passwords': [<sqlalchemy.sql.elements.Cast object at 0x10f3ed150>]}]]

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http://www.sqlalchemy.org/

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