Resolve marshmallow deprecation warning and support marshmallow 4.0

[kreathon]

Proposal for #116.

[codecov-commenter]

Codecov Report

Merging #117 (0e4606c) into master (0556746) will decrease coverage by 0.14%.
The diff coverage is 84.61%.

❗ Current head 0e4606c differs from pull request most recent head 1790d39. Consider uploading reports for the commit 1790d39 to get more accurate results

@@            Coverage Diff             @@
##           master     #117      +/-   ##
==========================================
- Coverage   98.44%   98.29%   -0.15%     
==========================================
  Files           7        7              
  Lines        1285     1291       +6     
==========================================
+ Hits         1265     1269       +4     
- Misses         20       22       +2     

Impacted Files	Coverage Δ
flask_accepts/utils.py	97.87% <80.00%> (-2.13%)	⬇️
flask_accepts/utils_test.py	100.00% <100.00%> (ø)

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[kreathon]

I am not sure how to handle the test coverage decrease.

Proper testing could involve running multiple tox environments and merging the coverage reports.

[kreathon]

Alternatively, marshmallow could be pinned to <4.0 for now.

[circulon]

@kreathon
did you get this resolved?
I would like to use flask_accepts with marshmallow 4 in my project

The issue looks to be here:

if marshmallow_version >= (3, 13, 0):
    _ma_key_for_fr_example_key = "dump_default"
    _ma_key_for_fr_default_key = "load_default"
else:
    _ma_key_for_fr_example_key = "default"
    _ma_key_for_fr_default_key = "missing"

where the lines after the else look to be ignored?
maybe something like this would work for the code coverage instead?

_ma_key_for_fr_example_key = "dump_default"
_ma_key_for_fr_default_key = "load_default"
if marshmallow_version < (3, 13, 0):
    _ma_key_for_fr_example_key = "default"
    _ma_key_for_fr_default_key = "missing"

I would be interested to know if this works?

@apryor6 can you provide any additional feedback?
Additionally how do we run the code coverage tests locally please?

[kreathon]

@circulon, you can check the .circleci/config.yml to see how to run the code coverage tests locally.

But my fear is that this project is dead (and it is not about coverage)

[circulon]

But my fear is that this project is dead (and it is not about coverage)

Bugger ;(

@kreathon are you working with or know of any other projects that are active and provide similar functionality?

Cheers

[kreathon]

@circulon I don't know. Personally, I am now sticking to plain Marshmallow.