lamindb.core.IsVersioned

class lamindb.core.IsVersioned

Bases: Model

Base class for versioned models.

Attributes

Meta = <class 'lnschema_core.models.IsVersioned.Meta'>

property pk

property stem_uid: str

Universal id characterizing the version family.

The full uid of a record is obtained via concatenating the stem uid and version information:

stem_uid = random_base62(n_char)  # a random base62 sequence of length n_char
version_uid = encode_base62(md5_hash(version))[:4]  # version is, e.g., "1" or "2.1.0" or "2022-03-01"
uid = f"{stem_uid}{version_uid}"  # concatenate the stem_uid & version_uid

property versions: QuerySet

Lists all records of the same version family.

>>> new_artifact = ln.Artifact(df2, revises=artifact)
>>> new_artifact.save()
>>> new_artifact.versions()

Methods

delete(using=None, keep_parents=False)

save(*args, force_insert=False, force_update=False, using=None, update_fields=None)

Save the current instance. Override this in a subclass if you want to control the saving process.

The ‘force_insert’ and ‘force_update’ parameters can be used to insist that the “save” must be an SQL insert or update (or equivalent for non-SQL backends), respectively. Normally, they should not be set.