Fix: #3924 by preventing an undefined schema for fixed array items (#…

…3929)

Fixes #3924 by defaulting to an empty object for the `itemSchema` when undefined
Fixes #3927 by fixing `getSnapshotBeforeUpdate()` added for the fix #1794
- In `@rjsf/core` updated `ArrayField`'s `renderFixedArray()` to default the `itemSchema` to an empty object if it is falsy
  - Updated the tests for `ArrayField` to verify the fix
  - Updated the `getSnapshotBeforeUpdate()` to diff the old and new props and to set the `shouldUpdate` prop if the old and new state differs
- Updated `CHANGELOG.md` accordingly
  - Also added entry for the fix for #3919

CHANGELOG.md

@@ -17,13 +17,19 @@ should change the heading of the (upcoming) version to include a major version b
 -->
 # 5.13.3
 
-## @rjsf/utils
+## @rjsf/antd
 
-- Updated `toPathSchemaInternal()` util to generate correct path schemas for fixed arrays by picking up individual schemas in the `items` array, fixing [#3909](https://github.com/rjsf-team/react-jsonschema-form/issues/3909)
+- Fixed the `SelectWidget` so that filtering works by reworking how `options` are passed to the underlying `Select`
 
 ## @rjsf/core
 
 - Replaced the deprecated `UNSAFE_componentWillReceiveProps()` method in the Form.tsx component with an improved solution utilizing the React lifecycle methods: `getSnapshotBeforeUpdate()` and `componentDidUpdate()`. Fixing [#1794](https://github.com/rjsf-team/react-jsonschema-form/issues/1794)
+- Fixed the `ArrayField` implementation to never pass an undefined schema for fixed arrays to other methods, fixing [#3924](https://github.com/rjsf-team/react-jsonschema-form/issues/3924)
+- Fixed a refresh issue in `getSnapshotBeforeUpdate()` and `componentDidUpdate()` caused by the fix for #1794, fixing [#3927](https://github.com/rjsf-team/react-jsonschema-form/issues/3927)
+
+## @rjsf/utils
+
+- Updated `toPathSchemaInternal()` util to generate correct path schemas for fixed arrays by picking up individual schemas in the `items` array, fixing [#3909](https://github.com/rjsf-team/react-jsonschema-form/issues/3909)
 
 # 5.13.2
 

packages/core/src/components/Form.tsx

@@ -281,35 +281,45 @@ export default class Form<
   }
 
   /**
-   * `getSnapshotBeforeUpdate` is a React lifecycle method that is invoked right before the most recently rendered output is committed to the DOM.
-   * It enables your component to capture current values (e.g., scroll position) before they are potentially changed.
+   * `getSnapshotBeforeUpdate` is a React lifecycle method that is invoked right before the most recently rendered
+   * output is committed to the DOM. It enables your component to capture current values (e.g., scroll position) before
+   * they are potentially changed.
    *
-   * In this case, it checks if the `formData` prop has changed since the last render. If it has, it computes the next state of the component
-   * using `getStateFromProps` method and returns it along with a `shouldUpdate` flag set to `true`. This ensures that we have the most up-to-date
+   * In this case, it checks if the props have changed since the last render. If they have, it computes the next state
+   * of the component using `getStateFromProps` method and returns it along with a `shouldUpdate` flag set to `true` IF
+   * the `nextState` and `prevState` are different, otherwise `false`. This ensures that we have the most up-to-date
    * state ready to be applied in `componentDidUpdate`.
    *
-   * If `formData` hasn't changed, it simply returns an object with `shouldUpdate` set to `false`, indicating that a state update is not necessary.
+   * If `formData` hasn't changed, it simply returns an object with `shouldUpdate` set to `false`, indicating that a
+   * state update is not necessary.
    *
    * @param prevProps - The previous set of props before the update.
-   * @returns Either an object containing the next state and a flag indicating that an update should occur, or an object with a flag indicating that an update is not necessary.
+   * @param prevState - The previous state before the update.
+   * @returns Either an object containing the next state and a flag indicating that an update should occur, or an object
+   *        with a flag indicating that an update is not necessary.
    */
   getSnapshotBeforeUpdate(
-    prevProps: FormProps<T, S, F>
+    prevProps: FormProps<T, S, F>,
+    prevState: FormState<T, S, F>
   ): { nextState: FormState<T, S, F>; shouldUpdate: true } | { shouldUpdate: false } {
-    if (!deepEquals(this.props.formData, prevProps.formData)) {
+    if (!deepEquals(this.props, prevProps)) {
       const nextState = this.getStateFromProps(this.props, this.props.formData);
-      return { nextState, shouldUpdate: true };
+      const shouldUpdate = !deepEquals(nextState, prevState);
+      return { nextState, shouldUpdate };
     }
     return { shouldUpdate: false };
   }
 
   /**
-   * `componentDidUpdate` is a React lifecycle method that is invoked immediately after updating occurs. This method is not called for the initial render.
+   * `componentDidUpdate` is a React lifecycle method that is invoked immediately after updating occurs. This method is
+   * not called for the initial render.
    *
-   * Here, it checks if an update is necessary based on the `shouldUpdate` flag received from `getSnapshotBeforeUpdate`. If an update is required,
-   * it applies the next state and, if needed, triggers the `onChange` handler to inform about changes.
+   * Here, it checks if an update is necessary based on the `shouldUpdate` flag received from `getSnapshotBeforeUpdate`.
+   * If an update is required, it applies the next state and, if needed, triggers the `onChange` handler to inform about
+   * changes.
    *
-   * This method effectively replaces the deprecated `UNSAFE_componentWillReceiveProps`, providing a safer alternative to handle prop changes and state updates.
+   * This method effectively replaces the deprecated `UNSAFE_componentWillReceiveProps`, providing a safer alternative
+   * to handle prop changes and state updates.
    *
    * @param _ - The previous set of props.
    * @param prevState - The previous state of the component before the update.

packages/core/src/components/fields/ArrayField.tsx

@@ -743,9 +743,9 @@ class ArrayField<T = any, S extends StrictRJSFSchema = RJSFSchema, F extends For
         const itemCast = item as unknown as T[];
         const additional = index >= itemSchemas.length;
         const itemSchema =
-          additional && isObject(schema.additionalItems)
+          (additional && isObject(schema.additionalItems)
             ? schemaUtils.retrieveSchema(schema.additionalItems as S, itemCast)
-            : itemSchemas[index];
+            : itemSchemas[index]) || {};
         const itemIdPrefix = idSchema.$id + idSeparator + index;
         const itemIdSchema = schemaUtils.toIdSchema(itemSchema, itemIdPrefix, itemCast, idPrefix, idSeparator);
         const itemUiSchema = additional

packages/core/test/ArrayField.test.jsx

@@ -1985,6 +1985,29 @@ describe('ArrayField', () => {
       expect(node.querySelectorAll('textarea').length).to.eql(2);
     });
 
+    it('[fixed] should silently handle additional formData not covered by fixed array', () => {
+      const { node, onSubmit } = createFormComponent({
+        schema: {
+          type: 'array',
+          items: [
+            {
+              type: 'string',
+            },
+            {
+              type: 'string',
+            },
+          ],
+        },
+        formData: ['foo', 'bar', 'baz'],
+      });
+      expect(node.querySelectorAll('input').length).to.eql(2);
+      submitForm(node);
+
+      sinon.assert.calledWithMatch(onSubmit.lastCall, {
+        formData: ['foo', 'bar', 'baz'],
+      });
+    });
+
     describe('operations for additional items', () => {
       const { node, onChange } = createFormComponent({
         schema: schemaAdditional,