Questions tagged [marshmallow-dataclass]
8 questions
2
votes
1 answer
Custom type serialization inside a data class
I have recently discovered python dataclasses, and I am trying to implement a dataclass, which has some 3rd party library type as a field. This member has its own serialisation methods, and special handling should be possible to define in…
user10203644
- 41
- 2
1
vote
0 answers
TypeError when creating a marshmallow schema from dataclass inherited from generic class
I'm trying to create a marshmallow schema from dataclass which is inherited from generic type:
users_schema = marshmallow_dataclass.class_schema(Users)()
This is my code:
from dataclasses import dataclass
from typing import Generic, List,…
Alexander Shpindler
- 811
- 1
- 11
- 31
1
vote
2 answers
marshmallow dataclass serialization: dump field with different name as load using 'data_key' and 'attribute'
I'm having trouble using the attribute field of marshmallow dataclasses (v3.x).
My problem: I get the input keys for schema.load as dict with non-python-valid names e.g. "external.id" and I want the output keys with schema.dump to be different e.g.…
nikitira
- 86
- 7
0
votes
1 answer
Dataclass with Marshmallow Schema failing on schema load method
I'm working with a dataclass which follows a marshmallow Schema, where this is the setup:
from marshmallow_dataclass import dataclass
import datetime
from typing import ClassVar, Type
import marshmallow
class BaseClass:
Schema:…
Steinn Hauser Magnússon
- 1,258
- 1
- 7
- 22
0
votes
1 answer
Set Required=True based on a condition in marshmallow
I was wondering whether there is a way in marshmallow to have a field to be required depending on another value.
Eg:
{ 'name':'Tom' }
{ 'name':'Arthur', 'job':'teacher' }
I'd like to know if there is a way to make the field job required if…
codeplay_
- 31
- 5
0
votes
1 answer
marshmallow NewType can not be turned into a dataclass, python 3.10
I'm in the process of upgrading to python 3.10 and in that context I thought it would be nice to also upgrade packages used. Right now, the problem is with the marshmallow packages and at this point I can't even run their example code for NewType…
myrtille
- 105
- 3
0
votes
1 answer
Can you have a conditional encoding dependent on whether a date time value is None?
Is it possible for the approver_time value to be encoded/ decoded only when the date time value is not set to None?
@dataclass_json(letter_case=LetterCase.CAMEL)
@dataclasses.dataclass
class A:
approver_time: datetime.datetime =…
kev0h1
- 25
- 5
0
votes
1 answer
How to prevent Marshmallow from partial dumping?
I have next data class and schema:
@dataclass
class Period:
id: int
year: int
month: EMonth
closed_at: Optional[datetime]
PeriodSchema = marshmallow_dataclass.class_schema(Period)
The problem is Marshmallow allows a partial dumping…
Denis Sologub
- 7,277
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