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marshmallow-code

8 indexed repositories · View on GitHub

marshmallow
A lightweight library for converting complex objects to and from simple Python datatypes.

Python · 7238 stars
webargs
A friendly library for parsing HTTP request arguments, with built-in support for popular web frameworks, including Flask, Django, Bottle,...

Python · 1410 stars
apispec
A pluggable API specification generator. Currently supports the OpenAPI Specification (f.k.a. the Swagger specification)..

Python · 1219 stars
flask-marshmallow
Flask + marshmallow for beautiful APIs

Python · 887 stars
flask-smorest
DB agnostic framework to build auto-documented REST APIs with Flask and marshmallow

Python · 717 stars
marshmallow-sqlalchemy
SQLAlchemy integration with marshmallow

Python · 580 stars
marshmallow-oneofschema
marshmallow library extension that allows schema (de)multiplexing

Python · 142 stars
apispec-webframeworks
Web framework plugins for apispec (formally in apispec.ext).

Python · 33 stars

Beginner friendly Everything

Open All

[Bug] Negative POSIX timestamps cannot be deserialized after timestamp serialization Open

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

marshmallow-code/marshmallow#3019 · 2 comments · Opened Aug 13, 2026
DateTime(format="timestamp") generates invalid OpenAPI schema using min instead of minimum Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

marshmallow-code/apispec#1064 · Opened Jul 30, 2026
Improve Falcon parser Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

marshmallow-code/webargs#1079 · 7 comments · 2 reactions · Opened Jul 22, 2026
Inconsistent value type when validating nested schema fields Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

marshmallow-code/marshmallow#2961 · 4 comments · Opened Apr 27, 2026
Dependency Dashboard Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

marshmallow-code/flask-smorest#855 · Opened Apr 16, 2026
Dependency Dashboard Open

Difficulty 1/5 Under an hour Newbie friendliness 30/100

marshmallow-code/apispec#1033 · Opened Apr 14, 2026
Dependency Dashboard Open

Difficulty 2/5 1-3 hours Newbie friendliness 38/100

marshmallow-code/flask-marshmallow#388 · Opened Apr 14, 2026
Dependency Dashboard Open

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

marshmallow-code/marshmallow#2953 · Opened Apr 13, 2026
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

marshmallow-code/webargs#1046 · Opened Apr 13, 2026
Dependency Dashboard Open

Difficulty 1/5 Under an hour Newbie friendliness 45/100

marshmallow-code/marshmallow-sqlalchemy#709 · Opened Apr 13, 2026
Dependency Dashboard Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

marshmallow-code/apispec-webframeworks#187 · Opened Apr 13, 2026
Dependency Dashboard Open

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

marshmallow-code/marshmallow-oneofschema#227 · Opened Apr 13, 2026
`apispec` ignores `oneOf` from `marshmallow-oneofschema` Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

marshmallow-code/apispec#1012 · 6 comments · Opened Feb 12, 2026
Feature - allow inheriting load_default from nested schema populated with from_dict Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

marshmallow-code/marshmallow#2889 · 2 comments · Opened Jan 6, 2026
Child schema's unknown setting in Meta class is ignored Open

Difficulty 3/5 1-2 days Newbie friendliness 50/100

marshmallow-code/marshmallow-oneofschema#216 · Opened Jul 29, 2025
Consistency with allow_none with serialization and deserialization Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

marshmallow-code/marshmallow#2836 · 1 comment · 1 reaction · Opened Jul 16, 2025
SchemaOpts misses partial Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

marshmallow-code/marshmallow#2834 · Opened Jun 24, 2025
'NoneType' object is not subscriptable when serializing fields that do not belong to the database is None Open

question

Difficulty 3/5 1-2 days Newbie friendliness 35/100

marshmallow-code/marshmallow#2833 · 3 comments · Opened Jun 20, 2025
Removing Schema context feels like a bad idea! Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

marshmallow-code/marshmallow#2832 · 3 comments · Opened Jun 20, 2025
Support Overlays standard Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 30/100

marshmallow-code/apispec#981 · 2 comments · Opened Jun 11, 2025
Is there a way to pre-define built-in validators that can be used multiple times? Open

question

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

marshmallow-code/marshmallow#2829 · 2 comments · Opened Jun 3, 2025
Length validation error on Enum fields Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

marshmallow-code/marshmallow-sqlalchemy#673 · 3 comments · 2 reactions · Opened May 20, 2025
It's hard to use a parent schema's data to control a Nested OneOfSchema Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

marshmallow-code/marshmallow-oneofschema#214 · 5 comments · Opened May 12, 2025
Don't set a field as required if it's read-only Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

marshmallow-code/marshmallow-sqlalchemy#672 · Opened May 11, 2025
Extra documentation for new context implementation? Open

polymorphism question

Difficulty 3/5 1-2 days Newbie friendliness 30/100

marshmallow-code/marshmallow#2824 · 21 comments · Opened Apr 24, 2025
TimeDelta misleading 'precision' argument & v4 breaking change Open

feedback welcome

Difficulty 4/5 3-5 days Newbie friendliness 35/100

marshmallow-code/marshmallow#2822 · 3 comments · Opened Apr 21, 2025
Dump converts int or bool to float Open

polymorphism

Difficulty 3/5 1-2 days Newbie friendliness 35/100

marshmallow-code/marshmallow#2816 · 1 comment · Opened Mar 31, 2025
Allowing partial response with return fields specified through a query param Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 28/100

marshmallow-code/flask-smorest#762 · 12 comments · 1 reaction · Opened Mar 25, 2025
I suspect a breaking change related to "include_relationships=True" and schema.load() in version 1.4.1 Open

help wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

marshmallow-code/marshmallow-sqlalchemy#664 · 5 comments · Opened Mar 14, 2025
Remove `only`, `exclude`, `many`, and `unknown` parameters of `Nested` and require callables to return Schema instances Open

backwards incompat feedback welcome

Difficulty 4/5 3-5 days Newbie friendliness 35/100

marshmallow-code/marshmallow#2794 · 1 comment · Opened Jan 19, 2025
Date and DateTime with format argument not rendered correctly Open

Difficulty 2/5 1-3 hours Newbie friendliness 30/100

marshmallow-code/apispec#938 · 1 reaction · Opened Sep 2, 2024
Document "content" parameters Open

backwards incompat feedback welcome

Difficulty 4/5 3-5 days Newbie friendliness 45/100

marshmallow-code/apispec#922 · Opened Jul 10, 2024
Issues in Streaming response from flask-smorest Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

marshmallow-code/flask-smorest#664 · 2 comments · Opened Jul 5, 2024
flask-smorest with subdomains and redoc Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

marshmallow-code/flask-smorest#661 · 2 comments · Opened Jun 30, 2024
File(allow_none=True) is not possible Open

help wanted

Difficulty 3/5 1-2 days Newbie friendliness 45/100

marshmallow-code/flask-marshmallow#319 · 11 comments · Opened Jun 11, 2024
TypeError: Schema.__init__() got an unexpected keyword argument 'include_data' Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

marshmallow-code/flask-marshmallow#316 · 1 comment · Opened Jun 3, 2024
Improving error handlers to satisfy both template and API server use cases Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

marshmallow-code/flask-smorest#640 · 6 comments · Opened Apr 25, 2024
Support for Dictionary Collections (collection=attribute_keyed_dict) Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

marshmallow-code/marshmallow-sqlalchemy#580 · 1 comment · Opened Apr 16, 2024
Inconsistency of return type of OneOfSchema.load Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

marshmallow-code/marshmallow-oneofschema#189 · Opened Mar 28, 2024
Possible redundant assertion in test_validate Open

Difficulty 1/5 Under an hour Newbie friendliness 45/100

marshmallow-code/marshmallow-oneofschema#188 · Opened Mar 28, 2024
Schema validation of mandatory fields on a blueprint with a HTTP PATCH method containing only modified fields Open

question

Difficulty 3/5 1-2 days Newbie friendliness 35/100

marshmallow-code/flask-smorest#628 · 5 comments · Opened Mar 25, 2024
fields.URL validation error should specify "not a valid FQDN" if trying to pass hostname without domain Open

Difficulty 2/5 1-3 hours Newbie friendliness 42/100

marshmallow-code/marshmallow#2243 · 2 comments · Opened Feb 20, 2024
Flask plugin does not gracefully fail when view is None Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

marshmallow-code/apispec-webframeworks#133 · 1 comment · Opened Feb 15, 2024
How to show docs with nginx url prefix set? Open

question

Difficulty 3/5 1-2 days Newbie friendliness 35/100

marshmallow-code/flask-smorest#606 · 1 comment · Opened Feb 15, 2024
Add requestBody component Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

marshmallow-code/apispec#886 · 14 comments · 1 reaction · Opened Feb 15, 2024
Document form data and images Open

question

Difficulty 4/5 3-5 days Newbie friendliness 25/100

marshmallow-code/apispec#874 · Opened Jan 10, 2024
The function decorated by the "post_load" decorator will undergo changes in parameter types as the function name changes. Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

marshmallow-code/flask-marshmallow#276 · Opened Dec 6, 2023
Building docs fails with Sphinx 7.2 and SOURCE_DATE_EPOCH environment variable Open

Difficulty 1/5 Under an hour Newbie friendliness 58/100

marshmallow-code/flask-marshmallow#275 · Opened Nov 10, 2023
Proposal: Allow register_blueprint option to name the Blueprint outside of Flask Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 42/100

marshmallow-code/flask-smorest#567 · 1 comment · Opened Oct 13, 2023
Swagger submitting incorrect format for Model-based form inputs Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

marshmallow-code/flask-smorest#566 · 4 comments · Opened Oct 12, 2023

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