Not possible to configure "any file extension" for File and Media field types.

[nitori]

When using a "File" or "Media" field type in Mask, it's currently not possible to specify the ability to attach any file type with any extension (the way it's configured in pages "media" field).

I suppose it's not as important for the "Media" type, but I'd like it for the "File" type.

When the allowedFileExtensions field is empty, Mask falls back to common-image-types or common-media-types.
If I insert an asterisk * in the field, then it appears to be correct at a glance when creating such a mask element, but when trying to actually add s file and save the element, the file just disappears.

Using * in the field sets the fields config/allowed TCA entry to "*".

The only working way seems to be to completely remove the "allowed" key from the TCA config, but there doesn't seem to be a way through Mask at the moment. Of course I can just remove it using TCA/Overrides.

I'd suggest (to keep some backwards compatibility), that the "allowed" key is only removed, if the special value * is inserted into the allowedFileExtensions field.

Greetings
Nitori

[nhovratov]

Hm, this is a little bit more work. I would rather avoid having this magic with * removes allowed. The proper solution would be to not fall back to common-images-types. However, this is breaking so this needs a migrator which fills all the empty config with allowed: common-image-types.

I'm reaaally unsure if it is worth it. For most people the fallback is great. Allowing any file type is so uncommon. In such a case, as you said, one can use TCA/Overrides.

I'll keep this ticket open for others to see, in case they stumble over this issue. If you want to work on this case, you're of course welcome to help.