DOC Auto scaffolding has_one relations

silverstripe · Dec 19, 2023 · 1d51771 · 1d51771
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diff --git a/en/04_Changelogs/5.2.0.md b/en/04_Changelogs/5.2.0.md
@@ -157,6 +157,12 @@ Both of these fields include a `setIsLazyLoaded()` method which will load a limi
 
 Note that these are both powered by react components, and are only intended to be used within the CMS. If you want to use them on the front-end of your project you will need to provide your own templates and JavaScript implementation for them.
 
+#### Auto scaffolding of `has_one` relations
+
+A `SearchableDropdownField` will now be used when automatically scaffolding `has_one` relations on a form in the CMS. Previously a `DropdownField` was used, and when there were over 100 items a [`NumericField`](api:SilverStripe\Forms\NumericField) was used which was not user friendly.
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+Previously the [`DBForeignKey.dropdown_field_threshold`](api:SilverStripe\ORM\FieldType\DBForeignKey->dropdown_field_threshold) config property was used as the threshold of the number of options to decide when to switch between auto-scaffolding a `DropdownField` and a `NumericField`. This configuration property is now used as the threshold of the number of options to decide when to start using lazy-loading for the `SearchableDropdownField`.
+
 ### More nuanced permissions for `/dev/*` routes {#dev-route-permissions}
 
 Previously, all `/dev/*` routes registered with [`DevelopmentAdmin`](api:SilverStripe\Dev\DevelopmentAdmin) (for example `/dev/tasks/MyBuildTask`) could only be access by administrator users, and this couldn't be configured.