我想知道如何序列化嵌套的Schema
的dict。在
天真地说,我希望这样的语法能够起作用:
fields.List(Schema)
fields.Dict(Schema)
或者也许
^{pr2}${cd3> 例如,假设我的对象是这样定义的: 我希望我的对象被序列化为 (问题也讨论了on GitHub。)from marshmallow import Schema, fields, pprint
class AlbumSchema(Schema):
year = fields.Int()
class ArtistSchema(Schema):
name = fields.Str()
# What should I write, here?
# This won't work
albums = fields.Nested(AlbumSchema(), many=True)
# If I write this, AlbumSchema is ignored, so this is equivalent to
albums = fields.Dict(AlbumSchema(), many=True)
# this, which is not satisfying (AlbumSchema unused)
albums = fields.Dict()
# This is not the way either
albums = fields.Dict(fields.Nested(AlbumSchema))
album_1 = dict(year=1971)
album_2 = dict(year=1970)
bowie = dict(name='David Bowie',
albums={
'Hunky Dory': album_1,
'The Man Who Sold the World': album_2
}
)
schema = ArtistSchema()
result = schema.dump(bowie)
pprint(result.data, indent=2)
{ 'albums': { 'Hunky Dory': {'year': 1971},
'The Man Who Sold the World': {'year': 1970}},
'name': 'David Bowie'}
但现在不可能有这样的功能:
它已经在研究:
2017年12月31日:此功能已添加到棉花糖3.0.0b5(https://github.com/marshmallow-code/marshmallow/pull/700)。在
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