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Source code for galaxy.model.migrate.versions.0121_workflow_uuids

Add UUIDs to workflows

import logging

from sqlalchemy import Column, MetaData, Table

from galaxy.model.custom_types import UUIDType

log = logging.getLogger(__name__)
metadata = MetaData()

Because both workflow and job requests can be determined
based the a fixed data structure, their IDs are based on
hashing the data structure
workflow_uuid_column = Column("uuid", UUIDType, nullable=True)

[docs]def upgrade(migrate_engine): print(__doc__) metadata.bind = migrate_engine metadata.reflect() # Add the uuid colum to the workflow table try: workflow_table = Table("workflow", metadata, autoload=True) workflow_uuid_column.create(workflow_table) assert workflow_uuid_column is workflow_table.c.uuid except Exception: log.exception("Adding column 'uuid' to workflow table failed.")
[docs]def downgrade(migrate_engine): metadata.bind = migrate_engine metadata.reflect() # Drop the workflow table's uuid column. try: workflow_table = Table("workflow", metadata, autoload=True) workflow_uuid = workflow_table.c.uuid workflow_uuid.drop() except Exception: log.exception("Dropping 'uuid' column from workflow table failed.")