…elds#66 (comment)

`permission_classes` expects tuple but list was provided

fix a bug: url from swagger_settings.DEFAULT_API_URL is not working

Check for allow_null attribute

This change fixes an `OPTIONS` request to the API page which will return
a successful response, but the `TemplateHTMLRender` will not be prepared
to render it since there is no template name provided in either the view
or response [1].

[1]: https://github.com/encode/django-rest-framework/blob/f0a5b958a134e8cd94e3ef3263e8fa623ac9b82f/rest_framework/renderers.py#L178-L189

fix map source mapping

[readme] Fix missing re_path import

Add utf-8 support for generated formats

Remove universal wheel, python 2 is unsupported

Add prepublish compatibility checks, a composite installation action and explicitly set tox targets

…ering-with-TemplateHTMLRenderer

handle errors rendering with TemplateHTMLRenderer

…one-field

add support for working with pytz object field

Add checker for allow_null attr

url from DEFAULT_API_URL now works axnsan12#681

This commit will make sure that `Django :: 3.2` will show up in the
classifiers list on PyPI: https://pypi.org/project/drf-yasg/

(The magic happens because we parse the README to get supported Django):
https://github.com/DavidCain/drf-yasg/blob/ee29412d3cdb311/setup.py#L36

3.2 support should already exist
================================
A closed pull request, axnsan12#735,
noted support for Django 3.2 in both `tox.ini`, and the README.

That PR was closed in favor of
axnsan12#741, which edited `tox.ini`
and switched to GitHub Actions.

axnsan12#735 (comment)

This project has been testing on Django 3.2 for a long time (about a
year). I think we can declare it supported it the README!

On `zsh` (a popular shell, and the default for macOS), install fails:

    $ pip install -U -e .[validation]
    zsh: no matches found: .[validation]

Quote the arguments so that `bash` or `zsh` will succeed.

Declare Django 3.2 support in README, classifiers

Fix `pip install` command for contributors on zsh

…Only (to hide nested serializer from payload if read_only=True has been set) and description (to show different descriptions for the same ref)