Slug isn't being set on self-hosted sites

[malinajirka]

Expected behavior

When I set a slug and update the post, the slug gets uploaded and saved.

Actual behavior

When I set a slug and update the post, the slugs gets cleared as soon as I leave the editor.

Steps to reproduce the behavior

1. Open a published post on a self-hosted site
2. Open Post settings
3. Set a slug
4. Click on Update
5. Open the post again and notice the slag is empty

Tested on [device], Android [version], WPAndroid [version]

Emulator, Android 9

[malinajirka]

We've investigated this issue with @ashiagr. We don't send the slug to the API (wp.editPost action -> it gets lost during the transformation from PostModel to the request here). We've also checked the documentation and it seems slug parameter isn't even supported. However, the documentation mentions string post_name: Encoded URL (slug) so we are wondering if we could use it or if it serves a different purpose.
As a next step I'd suggest checking how iOS handles slugs on self-hosted sites and we'll see where it leads us.

[ashiagr]

Tested on iOS app. Slug was properly saved on a self-hosted site. iOS app is using post_name parameter for the slug.

As discussed, we'll have to support this parameter in the requests for Android app and make changes to the wordpress-mobile/WordPress-FluxC-Android/