This PR was merged into the 2.3 branch.
Discussion
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[Form] fix form handling with OPTIONS request method
| Q | A
| ------------- | ---
| Bug fix? | yes
| New feature? | no
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets | #8282
| License | MIT
| Doc PR | -
The OPTIONS request is just handled as any other request method. And accoring to the spec, an options request can also contain a request body like a POST. This only applied when using the deprecated form processing with `$form->submit($request)`. The change also makes the handling consistent with the `handleRequest` behavior via https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Form/Extension/HttpFoundation/HttpFoundationRequestHandler.php
Commits
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28eabd8 [Form] fix form handling with unconventional request methods like OPTIONS