fiftyone.migrations.runner

FiftyOne migrations runner.

Copyright 2017-2025, Voxel51, Inc.

voxel51.com

Functions:

Version(version)	A packaging.version.Version proxy that excludes things like RC version info.
get_database_revision()	Gets the current revision of the database.
get_dataset_revision(name)	Gets the current revision of the given dataset.
get_datasets_revisions()	Gets the current revision of all datasets.
migrate_all([destination, error_level, verbose])	Migrates the database and all datasets to the specified destination revision.
migrate_database_if_necessary([destination, …])	Migrates the database to the specified revision, if necessary.
needs_migration([name, head, destination])	Determines whether a dataset requires a migration in order to be used in the specified destination revision.
migrate_dataset_if_necessary(name[, …])	Migrates the dataset from its current revision to the specified destination revision.

Classes:

MigrationRunner(head, destination[, …])

Class for running FiftyOne migrations.

fiftyone.migrations.runner.Version(version)

A packaging.version.Version proxy that excludes things like RC version info.

fiftyone.migrations.runner.get_database_revision()

Gets the current revision of the database.

Returns

the database revision string

fiftyone.migrations.runner.get_dataset_revision(name)

Gets the current revision of the given dataset.

Parameters

name – the name of the dataset

Returns

the dataset revision string

fiftyone.migrations.runner.get_datasets_revisions()

Gets the current revision of all datasets.

Returns

a dictionary mapping dataset names to their revision strings

fiftyone.migrations.runner.migrate_all(destination=None, error_level=0, verbose=False)

Migrates the database and all datasets to the specified destination revision.

If fiftyone.config.database_admin is False and no destination is provided, the database and each dataset will only be migrated if their current versions are not compatible with the client’s version.

Parameters

• destination (None) – the destination revision. By default, the fiftyone client version is used

• error_level (0) –

  the error level to use if an individual dataset cannot be migrated. Valid values are:

  • 0: raise error if a dataset cannot be migrated

  • 1: log warning if a dataset cannot be migrated

  • 2: ignore datasets that cannot be migrated

• verbose (False) – whether to log incremental migrations that are run

fiftyone.migrations.runner.migrate_database_if_necessary(destination=None, verbose=False, config=None)

Migrates the database to the specified revision, if necessary.

If fiftyone.config.database_admin is False and no destination is provided, the database will only be migrated if its current version is not compatible with the client’s version.

Parameters

• destination (None) – the destination revision. By default, the fiftyone client version is used

• verbose (False) – whether to log incremental migrations that are run

• config (None) – an optional DatabaseConfigDocument. By default, DB config is pulled from the database.

fiftyone.migrations.runner.needs_migration(name=None, head=None, destination=None)

Determines whether a dataset requires a migration in order to be used in the specified destination revision.

To use this method, specify either the name of an existing dataset or provide the head revision of the dataset.

If fiftyone.config.database_admin is False and no destination is provided, a dataset will be deemed to require no migration if its current version if compatible with the client’s version.

Parameters

• name (None) – the name of the dataset

• head (None) – the current revision of the dataset

• destination (None) – the destination revision. By default, the current database version is used

Returns

True/False

fiftyone.migrations.runner.migrate_dataset_if_necessary(name, destination=None, error_level=0, verbose=False)

Migrates the dataset from its current revision to the specified destination revision.

If fiftyone.config.database_admin is False and no destination is provided, the dataset will only be migrated if its current version is not compatible with the client’s version.

Parameters

• name – the name of the dataset

• destination (None) – the destination revision. By default, the current database version is used

• error_level (0) –

  the error level to use. Valid values are:

  • 0: raise error if the dataset cannot be migrated

  • 1: log warning if the dataset cannot be migrated

  • 2: ignore datasets that cannot be migrated

• verbose (False) – whether to log incremental migrations that are run

class fiftyone.migrations.runner.MigrationRunner(head, destination, _revisions=None, _admin_revisions=None)

Bases: object

Class for running FiftyOne migrations.

Parameters

• head – the current revision

• destination – the destination revision

Attributes:

head	The head revision.
destination	The destination revision.
direction	The direction of the migration runner; one of ("up", "down").
has_revisions	Whether there are any revisions to run.
has_admin_revisions	Whether there are any admin revisions to run.
revisions	The list of revisions that will be run by run().
admin_revisions	The list of admin revisions that will be run by run_admin().

Methods:

run(dataset_name[, verbose])	Runs any required migrations on the specified dataset.
run_admin([verbose])	Runs any required admin revisions.

property head

The head revision.

property destination

The destination revision.

property direction

The direction of the migration runner; one of ("up", "down").

property has_revisions

Whether there are any revisions to run.

property has_admin_revisions

Whether there are any admin revisions to run.

property revisions

The list of revisions that will be run by run().

property admin_revisions

The list of admin revisions that will be run by run_admin().

run(dataset_name, verbose=False)

Runs any required migrations on the specified dataset.

Parameters

• dataset_name – the name of the dataset to migrate

• verbose (False) – whether to log incremental migrations that are run

run_admin(verbose=False)

Runs any required admin revisions.

Parameters

verbose (False) – whether to log incremental migrations that are run