TTL

Define a TTL field and use .from_now() to compute epoch timestamps.

Define TTL in Model

class Sessions(db.Table):
    __table_name__ = "sessions"
    pk = PK("session_id")
    ttl = TTL("expires_at")

Usage

sessions = Sessions()
sessions.put(
    session_id="sess_123",
    expires_at=sessions.ttl.from_now(hours=24)
)

# Combine units
sessions.put(
    session_id="sess_456",
    expires_at=sessions.ttl.from_now(days=7, hours=12)
)

# All time units: days=, hours=, minutes=, seconds=

Available Time Units

Unit	Description
days	Number of days
hours	Number of hours
minutes	Number of minutes
seconds	Number of seconds

info

from_now() returns an int (Unix epoch timestamp). DynamoDB will automatically delete the item after the TTL expires (typically within 48 hours of expiration).