## Problem
GraphQL join fields nested inside tabs and collapsibles return empty
results due to missing `collectionSlug` parameter propagation in the
tabs and collapsible resolver.
## Root Cause
The `tabs` resolver in `fieldToSchemaMap.ts` doesn't pass
`collectionSlug` to nested field resolvers, causing polymorphic
relationship queries to fail when constructing MongoDB filters.
## Solution
- Added `collectionSlug` parameter to tabs resolver function signature
- Pass `collectionSlug` to `buildObjectType` for named tabs
- Pass `collectionSlug` to `addSubField` for unnamed tabs
## Testing
- [x] Verified join fields work correctly in tab-nested scenarios
- [x] Tested with multiple collection types
- [x] Confirmed no breaking changes to existing functionality
Fixes#13345
We have got this running successfully in production and are looking
forward for this to get merged so we do not have to patch the core
anymore :)
---------
Co-authored-by: Alessio Gravili <alessio@gravili.de>
e52b7572c5