Clayton b8d85e0b26 fix: prevent default object re-selection in relation field form (#17313)
Fixes #17111

### Problem
When creating a Relation field, after deselecting the pre-selected
default object (e.g., Company) and selecting a different object (e.g.,
Opportunity), both objects would end up being selected, showing "2
Objects" instead of just the newly selected one.

### Root Cause
The `initialMorphRelationsObjectMetadataIds` array was being recreated
on every component render, causing react-hook-form's `Controller` to
treat the `defaultValue` prop as a new value and re-apply it after user
changes.

### Solution
1. **Memoized the initial value**: Used `useMemo` to ensure
`initialMorphRelationsObjectMetadataIds` has a stable reference across
renders
2. **Added initialization guard**: Used `useEffect` with a `useRef` flag
to ensure the default value is only set once during component mount
3. **Maintained Controller defaultValue**: Kept the `defaultValue` prop
on the Controller, which now works correctly with the stable memoized
value

### Changes
- `SettingsDataModelFieldRelationForm.tsx`: Added memoization and
initialization guard to prevent default value re-application

---------

Co-authored-by: Etienne <45695613+etiennejouan@users.noreply.github.com>
2026-01-30 17:12:43 +00:00
2024-11-06 14:24:07 +01:00
2025-08-07 17:02:12 +02:00
2025-07-08 15:13:02 +02:00

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