flowserv.model.database module

Wrapper for database connections. The wrapper is used to open database sessions as well as to create a fresh database.

class flowserv.model.database.DB(connect_url: str, web_app: Optional[bool] = False, echo: Optional[bool] = False)

Bases: object

Wrapper to establish a database connection and create the database schema.

init() → flowserv.model.database.DB

Create all tables in the database model schema. This will also register the default user. The password for the user is a random UUID since the default user is not expected to login (but be used only in open access policies).

session()

Create a new database session instance. The sessoin is wrapped by a context manager to properly manage the session scope.

Return type

flowserv.model.database.SessionScope

flowserv.model.database.SQLITE_DB(dirname: str, filename: Optional[str] = 'test.db')

Get connection Url for a databse file.

class flowserv.model.database.SessionScope(session)

Bases: object

Context manager for providing transactional scope around a series of database operations.

close()

Close the session.

open()

Get a reference to the database session object.

flowserv.model.database.TEST_DB(dirname: str, filename: Optional[str] = 'test.db')

Get connection Url for a databse file.