fix isMultiple check by adding compare with false (#3811)

Co-authored-by: Nick Grosenbacher <nickgrosenbacher@gmail.com>
rjsf-team · Sep 1, 2023 · b07eda3 · b07eda3
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -21,6 +21,10 @@ should change the heading of the (upcoming) version to include a major version b
 
 - Updated `MultiSchemaField` to only merge top level required field fixing duplicate field and description.
 
+## @rjsf/chakra-ui
+
+- Fixed a faulty check of the `isMultiple` option in `MultiSchemaField`. It no longer offers multiple choice inside a select field in a `oneOf` case in Chakra UI, fixing [#3848](https://github.com/rjsf-team/react-jsonschema-form/issues/3848)
+
 # 5.12.1
 
 ## @rjsf/validator-ajv8

diff --git a/packages/chakra-ui/src/SelectWidget/SelectWidget.tsx b/packages/chakra-ui/src/SelectWidget/SelectWidget.tsx
@@ -73,7 +73,7 @@ export default function SelectWidget<T = any, S extends StrictRJSFSchema = RJSFS
       })
     : [];
 
-  const isMultiple = typeof multiple !== 'undefined' && Boolean(enumOptions);
+  const isMultiple = typeof multiple !== 'undefined' && multiple !== false && Boolean(enumOptions);
   const selectedIndex = enumOptionsIndexForValue<S>(value, enumOptions, isMultiple);
   const formValue: any = isMultiple
     ? ((selectedIndex as string[]) || []).map((i: string) => {