adding optional_field in Serializermutation to enfore some fields to be optional

[mahmoudmostafa0]

i want to use rest_framework Serializermutation and i want to force some fields to be optional

[mahmoudmostafa0]

this was available in v2 however i found it removed in v3

[kiendang]

Thanks @mahmoudmostafa0. There's a small typo there. Also could you run the linting as well (tox -e pre-commit)?

[mahmoudmostafa0]

thanks @kiendang for reviewing I`ve tried out the linting and this is the final results I got :

check for merge conflicts................................................Passed
check json...............................................................Passed
check yaml...............................................................Passed
debug statements (python)................................................Passed
fix end of files.........................................................Passed
pretty format json.......................................................Passed
trim trailing whitespace.................................................Passed
black....................................................................Passed
ruff.....................................................................Passed
pre-commit: OK (6.86=setup[0.05]+cmd[6.81] seconds)
congratulations :) (9.61 seconds)

[kiendang]

LGTM. Need another set of eyes though.

This is the same as #1080 which was merged into v2.