Support nested relational values in conditional fields

Preflight Checklist

• I have completed all [Troubleshooting Steps](
• I'm on [the latest version of Directus](
• There's [no other issue]( that already describes my problem.

Describe the Bug

My test case is, that I want to hide a field if there is a item selected in a m2m relation:




To Reproduce

1. Create Collection A & B
2. Add m2m Relation between both collections
3. Add some items to both collections
4. Add field name to Collection A
5. Add a condition to field name :

6. Select that name should be hidden if the condition matches


What version of Directus are you using?

v9.0.0-rc.93

What version of Node.js are you using?

v14.17.5

What database are you using?

MySQL 8

What browser are you using?

Chrome

What operating system are you using?

Windows

How are you deploying Directus?

Linux VPS