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Source code for tool_shed.webapp.model.migrate.versions.0025_session_timeout

"""
Migration script to add session update time (used for timeouts)
"""

import datetime
import logging

from sqlalchemy import (
    Column,
    DateTime,
    MetaData,
    Table,
)

now = datetime.datetime.utcnow
log = logging.getLogger(__name__)
metadata = MetaData()


[docs]def upgrade(migrate_engine): metadata.bind = migrate_engine print(__doc__) metadata.reflect() lastaction_column = Column("last_action", DateTime) __add_column(lastaction_column, "galaxy_session", metadata)
[docs]def downgrade(migrate_engine): metadata.bind = migrate_engine metadata.reflect() __drop_column("last_action", "galaxy_session", metadata)
def __add_column(column, table_name, metadata, **kwds): try: table = Table(table_name, metadata, autoload=True) column.create(table, **kwds) except Exception: log.exception("Adding column %s failed.", column) def __drop_column(column_name, table_name, metadata): try: table = Table(table_name, metadata, autoload=True) getattr(table.c, column_name).drop() except Exception: log.exception("Dropping column %s failed.", column_name)