+++++++++++++++++++
Bug fixes:
* Add ``marshmallow_sqlalchemy.fields.Nested`` field that inherits its session from its schema. This fixes a bug where an exception was raised when using ``Nested`` within a ``ModelSchema`` (:issue:`67`).
Thanks :user:`nickw444` for reporting and thanks :user:`samueljsb` for the PR.
User code should be updated to use marshmallow-sqlalchemy's ``Nested`` instead of ``marshmallow.fields.Nested``.
.. code-block:: python
Before
from marshmallow import fields
from marshmallow_sqlalchemy import ModelSchema
class ArtistSchema(ModelSchema):
class Meta:
model = models.Artist
class AlbumSchema(ModelSchema):
class Meta:
model = models.Album
artist = fields.Nested(ArtistSchema)
After
from marshmallow import fields
from marshmallow_sqlalchemy import ModelSchema
from marshmallow_sqlalchemy.fields import Nested
class ArtistSchema(ModelSchema):
class Meta:
model = models.Artist
class AlbumSchema(ModelSchema):
class Meta:
model = models.Album
artist = Nested(ArtistSchema)