fix: fixed several issue in oneOf/anyOf functions

Fixes rjsf-team#2944, rjsf-team#3236, rjsf-team#2978 and possibly others
- In `@rjsf/utils`, added new `getClosestMatchingOption()`, `getFirstMatchingOption()` and `sanitizeDataForNewSchema()` schema-based utility functions
  - Deprecated `getMatchingOption()` and updated all calls to it in other utility functions to use `getFirstMatchingOption()`
  - Added 100% unit tests for all new functions, renaming the old `getMatchingOptionsTest.ts` file to `getFirstMatchingOptionsTest.ts`
  - Updated `createSchemaUtils()` and it's associated type to add the three new functions
- In `@rjsf/validator-ajv6` and `@rjsf/validator-ajv8`, updated the `schema.tests.ts` to add the new tests for the new schema-based utility functions
- In `@rjsf/core`, updated the `MultiSchemaField` to use the new `getClosestMatchingOption()` and `sanitizeDataForNewSchema()` utility functions
  - Also updated the render to properly pass props to the widget and the schema field
- In `@rjsf/playground`, updated `onFormDataEdited()` to only change the formData in the state if the `JSON.stringify()` of the old and new values are different
  - Also updated the `npm start` command to add the `--force` option to avoid issues where changes made to other packages weren't getting picked up due to `vite` caching
- Updated the `utility-functions.md` file to document the new schema-based functions and to fix up incorrect strike-through caused by the unescaped `<S>` generic
- Updated the `5.x upgrade guide.md` file to document the new utility functions and the deprecation of `getMatchingOption()`

CHANGELOG.md

@@ -15,6 +15,20 @@ it according to semantic versioning. For example, if your PR adds a breaking cha
 should change the heading of the (upcoming) version to include a major version bump.
 
 -->
+# 5.0.0-beta-18
+
+# @rjsf/core
+- Updated `MultiSchemaField` to utilize the new `getClosestMatchingOption()` and `sanitizeDataForNewSchema()` functions, fixing [#2944](https://github.com/rjsf-team/react-jsonschema-form/issues/2944), [#3236](https://github.com/rjsf-team/react-jsonschema-form/issues/3236), [#2978](https://github.com/rjsf-team/react-jsonschema-form/issues/2978), and probably others
+
+# @rjsf/utils
+- Added new `getClosestMatchingOption()`, `getFirstMatchingOption()` and `sanitizeDataForNewSchema()` schema-based utility functions
+  - Deprecated `getMatchingOption()` and updated all calls to it in other utility functions to use `getFirstMatchingOption()`
+
+## Dev / docs / playground
+- Updated the playground to `onFormDataEdited()` to only change the formData in the state if the `JSON.stringify()` of the old and new values are different, partially fixing [#3236](https://github.com/rjsf-team/react-jsonschema-form/issues/3236)
+- Updated the playground `npm start` command to always use the `--force` option to avoid issues where changes made to other packages weren't getting picked up due to `vite` caching
+- Updated the documentation for `utility-functions` and the `5.x upgrade guide` to add the new utility functions and to document the deprecation of `getMatchingOption()`
+
 # 5.0.0-beta-17
 
 ## @rjsf/antd

docs/5.x upgrade guide.md

@@ -27,7 +27,7 @@ Unfortunately, there is required work pending to properly support React 18, so u
 There are four new packages added in RJSF version 5:
 
 - `@rjsf/utils`: All of the [utility functions](https://react-jsonschema-form.readthedocs.io/en/stable/api-reference/utiltity-functions) previously imported from `@rjsf/core/utils` as well as the Typescript types for RJSF version 5.
-  - The following new utility functions were added: `createSchemaUtils()`, `getInputProps()`, `mergeValidationData()` and `processSelectValue()`
+  - The following new utility functions were added: `ariaDescribedByIds()`, `createSchemaUtils()`, `descriptionId()`, `enumOptionsDeselectValue()`, `enumOptionsSelectValue()`, `errorId()`, `examplesId()`, `getClosestMatchingOption()`, `getFirstMatchingOption()`, `getInputProps()`, `helpId()`, `mergeValidationData()`, `optionId()`, `processSelectValue()`, `sanitizeDataForNewSchema()` and `titleId()`
 - `@rjsf/validator-ajv6`: The [ajv](https://github.com/ajv-validator/ajv)-v6-based validator refactored out of `@rjsf/[email protected]`, that implements the `ValidatorType` interface defined in `@rjsf/utils`.
 - `@rjsf/validator-ajv8`: The [ajv](https://github.com/ajv-validator/ajv)-v8-based validator that is an upgrade of the `@rjsf/validator-ajv6`, that implements the `ValidatorType` interface defined in `@rjsf/utils`. See the ajv 6 to 8 [migration guide](https://ajv.js.org/v6-to-v8-migration.html) for more information.
 - `@rjsf/mui`: Previously `@rjsf/material-ui/v5`, now provided as its own theme.
@@ -231,6 +231,7 @@ render((
 In version 5, all the utility functions that were previously accessed via `import { utils } from '@rjsf/core';` are now available via `import utils from '@rjsf/utils';`.
 Because of the decoupling of validation from `@rjsf/core` there is a breaking change for all the [validator-based utility functions](https://react-jsonschema-form.readthedocs.io/en/stable/api-reference/utiltity-functions#validator-based-utility-functions), since they now require an additional `ValidatorType` parameter.
 More over, one previously exported function `resolveSchema()` is no longer exposed in the `@rjsf/utils`, so use `retrieveSchema()` instead.
+Finally, one previously exported function `getMatchingOption()` has been deprecated in favor of `getFirstMatchingOption()`.
 
 If you have built custom fields or widgets that utilized any of these breaking-change functions, don't worry, there is a quick and easy solution for you.
 The `registry` has a breaking-change which removes the previously deprecated `definitions` property while adding the new `schemaUtils` property.
@@ -259,8 +260,10 @@ import { RJSFSchema, WidgetProps, getUiOptions } from '@rjsf/utils';
 function YourWidget(props: WidgetProps) {
   const { registry, uiSchema } = props;
   const { schemaUtils } = registry;
+// const matchingOption = getMatchingOption({}, options, rootSchema); <- version 4
 // const isMultiSelect = isMultiSelect(schema, rootSchema); <- version 4
 // const newSchema = resolveSchema(schema, formData, rootSchema); <- version 4
+  const matchingOption = schemaUtils.getFirstMatchingOption({}, options);
   const isMultiSelect = schemaUtils.isMultiSelect(schema);
   const newSchema: RJSFSchema = schemaUtils.retrieveSchema(schema, formData);
   const options = getUiOptions(uiSchema);
@@ -399,6 +402,9 @@ From v5, the child fields will correctly use the parent id when generating its o
 
 #### Deprecations added in v5
 
+##### getMatchingOption()
+The utility function `getMatchingOption()` was deprecated in favor of the more aptly named `getFirstMatchingOption()` which has the exact same implementation.
+
 ##### Non-standard `enumNames` property
 
 `enumNames` is a non-standard JSON Schema field that was deprecated in version 5.

docs/api-reference/utility-functions.md

@@ -99,22 +99,22 @@ Return a consistent `id` for the field description element.
 Removes the `value` from the currently `selected` list of values.
 
 #### Parameters
-- value: EnumOptionsType<S>["value"] - The value that should be selected
-- selected: EnumOptionsType<S>["value"][] - The current list of selected values
+- value: EnumOptionsType\<S>["value"] - The value that should be selected
+- selected: EnumOptionsType\<S>["value"][] - The current list of selected values
 
 #### Returns
-- EnumOptionsType<S>["value"][]: The updated `selected` list with the `value` removed from it
+- EnumOptionsType\<S>["value"][]: The xupdated `selected` list with the `value` removed from it
 
 ### enumOptionsSelectValue\<S extends StrictRJSFSchema = RJSFSchema>()
 Add the `value` to the list of `selected` values in the proper order as defined by `allEnumOptions`.
 
 #### Parameters
-- value: EnumOptionsType<S>["value"] - The value that should be selected
-- selected: EnumOptionsType<S>["value"][] - The current list of selected values
-- allEnumOptions: EnumOptionsType<S>[] - The list of all the known enumOptions
+- value: EnumOptionsType\<S>["value"] - The value that should be selected
+- selected: EnumOptionsType\<S>["value"][] - The current list of selected values
+- allEnumOptions: EnumOptionsType\<S>[] - The list of all the known enumOptions
 
 #### Returns
-- EnumOptionsType<S>["value"][]: The updated list of selected enum values with `value` added to it in the proper location
+- EnumOptionsType\<S>["value"][]: The updated list of selected enum values with `value` added to it in the proper location
 
 ### errorId<T = any>()
 Return a consistent `id` for the field error element.
@@ -344,7 +344,7 @@ Return a consistent `id` for the `option`s of a `Radio` or `Checkboxes` widget
 
 #### Parameters
 - id: string - The id of the parent component for the option
-- option: EnumOptionsType<S> - The option for which the id is desired
+- option: EnumOptionsType\<S> - The option for which the id is desired
 
 #### Returns
 - string: An id for the option based on the parent `id`
@@ -517,8 +517,46 @@ Determines whether the combination of `schema` and `uiSchema` properties indicat
 #### Returns
 - boolean: True if the label should be displayed or false if it should not
 
+### getClosestMatchingOption<T = any, S extends StrictRJSFSchema = RJSFSchema, F extends FormContextType = any>()
+Determines which of the given `options` provided most closely matches the `formData`. Using
+`getFirstMatchingOption()` to match two schemas that differ only by the readOnly, default or const value of a field
+based on the `formData` and returns 0 when there is no match. Rather than passing in all the `options` at once to
+this utility, instead an array of valid option indexes is created by iterating over the list of options, call
+`getFirstMatchingOptions` with a list of one junk option and one good option, seeing if the good option is considered
+matched.
+
+Once the list of valid indexes is created, if there is only one valid index, just return it. Otherwise, if there are
+no valid indexes, then fill the valid indexes array with the indexes of all the options. Next, the index of the
+option with the highest score is determined by iterating over the list of valid options, calling
+`calculateIndexScore()` on each, comparing it against the current best score, and returning the index of the one that
+eventually has the best score.
+
+#### Parameters
+- validator: ValidatorType<T, S, F> - An implementation of the `ValidatorType` interface that will be used when necessary
+- rootSchema: S - The root schema, used to primarily to look up `$ref`s
+- formData: T - The current formData, if any, used to figure out a match
+- options: S[] - The list of options to find a matching options from
+- [selectedOption=-1]: number - The index of the currently selected option, defaulted to -1 if not specified
+
+#### Returns
+- number: The index of the option that is the closest match to the `formData` or the `selectedOption` if no match
+
+### getFirstMatchingOption<T = any, S extends StrictRJSFSchema = RJSFSchema, F extends FormContextType = any>()
+Given the `formData` and list of `options`, attempts to find the index of the first option that matches the data.
+Always returns the first option if there is nothing that matches.
+
+#### Parameters
+- validator: ValidatorType<T, S, F> - An implementation of the `ValidatorType` interface that will be used when necessary
+- formData: T | undefined - The current formData, if any, used to figure out a match
+- options: S[] - The list of options to find a matching options from
+- rootSchema: S - The root schema, used to primarily to look up `$ref`s
+
+#### Returns
+- number: The index of the first matched option or 0 if none is available
+
 ### getMatchingOption<T = any, S extends StrictRJSFSchema = RJSFSchema, F extends FormContextType = any>()
 Given the `formData` and list of `options`, attempts to find the index of the option that best matches the data.
+Deprecated, use `getFirstMatchingOption()` instead.
 
 #### Parameters
 - validator: ValidatorType<T, S, F> - An implementation of the `ValidatorType` interface that will be used when necessary
@@ -589,6 +627,22 @@ potentially recursive resolution.
 #### Returns
 - RJSFSchema: The schema having its conditions, additional properties, references and dependencies resolved
 
+### sanitizeDataForNewSchema<T = any, S extends StrictRJSFSchema = RJSFSchema, F extends FormContextType = any>()
+Sanitize the `data` associated with the `oldSchema` so it is considered appropriate for the `newSchema`.
+If the new schema does not contain any properties, then `undefined` is returned to clear all the form data.
+Due to the nature of schemas, this sanitization happens recursively for nested objects of data.
+Also, any properties in the old schema that are non-existent in the new schema are set to `undefined`.
+
+#### Parameters
+- validator: ValidatorType<T, S, F> - An implementation of the `ValidatorType` interface that will be used when necessary
+- rootSchema: S - The root JSON schema of the entire form
+- [newSchema]: S - The new schema for which the data is being sanitized
+- [oldSchema]: S - The old schema from which the data originated
+- [data={}]: any - The form data associated with the schema, defaulting to an empty object when undefined
+
+#### Returns
+- T: The new form data, with all the fields uniquely associated with the old schema set to `undefined`. Will return `undefined` if the new schema is not an object containing properties.
+
 ### toIdSchema<T = any, S extends StrictRJSFSchema = RJSFSchema, F extends FormContextType = any>()
 Generates an `IdSchema` object for the `schema`, recursively
 

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

@@ -1,16 +1,17 @@
 import React, { Component } from "react";
+import get from "lodash/get";
+import isEmpty from "lodash/isEmpty";
+import omit from "lodash/omit";
 import {
   getUiOptions,
   getWidget,
-  guessType,
   deepEquals,
   FieldProps,
   FormContextType,
   RJSFSchema,
   StrictRJSFSchema,
+  ERRORS_KEY,
 } from "@rjsf/utils";
-import has from "lodash/has";
-import unset from "lodash/unset";
 
 /** Type used for the state of the `AnyOfField` component */
 type AnyOfFieldState = {
@@ -83,8 +84,12 @@ class AnyOfField<
   getMatchingOption(selectedOption: number, formData: T, options: S[]) {
     const { schemaUtils } = this.props.registry;
 
-    const option = schemaUtils.getMatchingOption(formData, options);
-    if (option !== 0) {
+    const option = schemaUtils.getClosestMatchingOption(
+      formData,
+      options,
+      selectedOption
+    );
+    if (option > 0) {
       return option;
     }
     // If the form data matches none of the options, use the currently selected
@@ -98,53 +103,40 @@ class AnyOfField<
    *
    * @param option -
    */
-  onOptionChange = (option: any) => {
-    const selectedOption = parseInt(option, 10);
+  onOptionChange = (option?: string) => {
+    const { selectedOption } = this.state;
     const { formData, onChange, options, registry } = this.props;
     const { schemaUtils } = registry;
-    const newOption = schemaUtils.retrieveSchema(
-      options[selectedOption],
+    const intOption = option !== undefined ? parseInt(option, 10) : -1;
+    if (intOption === selectedOption) {
+      return;
+    }
+    const newOption =
+      intOption >= 0
+        ? schemaUtils.retrieveSchema(options[intOption], formData)
+        : undefined;
+    const oldOption =
+      selectedOption >= 0
+        ? schemaUtils.retrieveSchema(options[selectedOption], formData)
+        : undefined;
+
+    let newFormData = schemaUtils.sanitizeDataForNewSchema(
+      newOption,
+      oldOption,
       formData
     );
-
-    // If the new option is of type object and the current data is an object,
-    // discard properties added using the old option.
-    let newFormData: T | undefined = undefined;
-    if (
-      guessType(formData) === "object" &&
-      (newOption.type === "object" || newOption.properties)
-    ) {
-      newFormData = Object.assign({}, formData);
-
-      const optionsToDiscard = options.slice();
-      optionsToDiscard.splice(selectedOption, 1);
-
-      // Discard any data added using other options
-      for (const option of optionsToDiscard) {
-        if (option.properties) {
-          for (const key in option.properties) {
-            if (has(newFormData, key)) {
-              unset(newFormData, key);
-            }
-          }
-        }
-      }
-    }
-    // Call getDefaultFormState to make sure defaults are populated on change. Pass "excludeObjectChildren"
-    // so that only the root objects themselves are created without adding undefined children properties
-    onChange(
-      schemaUtils.getDefaultFormState(
-        options[selectedOption],
+    if (newFormData && newOption) {
+      // Call getDefaultFormState to make sure defaults are populated on change. Pass "excludeObjectChildren"
+      // so that only the root objects themselves are created without adding undefined children properties
+      newFormData = schemaUtils.getDefaultFormState(
+        newOption,
         newFormData,
         "excludeObjectChildren"
-      ) as T,
-      undefined,
-      this.getFieldId()
-    );
+      ) as T;
+    }
+    onChange(newFormData, undefined, this.getFieldId());
 
-    this.setState({
-      selectedOption: parseInt(option, 10),
-    });
+    this.setState({ selectedOption: intOption });
   };
 
   getFieldId() {
@@ -158,19 +150,11 @@ class AnyOfField<
    */
   render() {
     const {
-      name,
       baseType,
       disabled = false,
-      readonly = false,
-      hideError = false,
       errorSchema = {},
-      formData,
       formContext,
-      idPrefix,
-      idSeparator,
-      idSchema,
       onBlur,
-      onChange,
       onFocus,
       options,
       registry,
@@ -180,8 +164,16 @@ class AnyOfField<
     const { widgets, fields } = registry;
     const { SchemaField: _SchemaField } = fields;
     const { selectedOption } = this.state;
-    const { widget = "select", ...uiOptions } = getUiOptions<T, S, F>(uiSchema);
+    const {
+      widget = "select",
+      placeholder,
+      autofocus,
+      autocomplete,
+      ...uiOptions
+    } = getUiOptions<T, S, F>(uiSchema);
     const Widget = getWidget<T, S, F>({ type: "number" }, widget, widgets);
+    const rawErrors = get(errorSchema, ERRORS_KEY, []);
+    const fieldErrorSchema = omit(errorSchema, [ERRORS_KEY]);
 
     const option = options[selectedOption] || null;
     let optionSchema;
@@ -208,33 +200,22 @@ class AnyOfField<
             onChange={this.onOptionChange}
             onBlur={onBlur}
             onFocus={onFocus}
+            disabled={disabled || isEmpty(enumOptions)}
+            multiple={false}
+            rawErrors={rawErrors}
+            errorSchema={fieldErrorSchema}
             value={selectedOption}
-            options={{ enumOptions }}
+            options={{ enumOptions, ...uiOptions }}
             registry={registry}
             formContext={formContext}
-            {...uiOptions}
+            placeholder={placeholder}
+            autocomplete={autocomplete}
+            autofocus={autofocus}
             label=""
           />
         </div>
         {option !== null && (
-          <_SchemaField
-            name={name}
-            schema={optionSchema}
-            uiSchema={uiSchema}
-            errorSchema={errorSchema}
-            idSchema={idSchema}
-            idPrefix={idPrefix}
-            idSeparator={idSeparator}
-            formData={formData}
-            formContext={formContext}
-            onChange={onChange}
-            onBlur={onBlur}
-            onFocus={onFocus}
-            registry={registry}
-            disabled={disabled}
-            readonly={readonly}
-            hideError={hideError}
-          />
+          <_SchemaField {...this.props} schema={optionSchema} />
         )}
       </div>
     );

packages/core/test/anyOf_test.js

@@ -56,6 +56,33 @@ describe("anyOf", () => {
     expect(node.querySelector("select").id).eql("root__anyof_select");
   });
 
+  it("should render a root select element with default value", () => {
+    const formData = { foo: "b" };
+    const schema = {
+      type: "object",
+      anyOf: [
+        {
+          title: "foo1",
+          properties: {
+            foo: { type: "string", enum: ["a", "b"], default: "a" },
+          },
+        },
+        {
+          title: "foo2",
+          properties: {
+            foo: { type: "string", enum: ["a", "b"], default: "b" },
+          },
+        },
+      ],
+    };
+
+    const { node } = createFormComponent({
+      schema,
+      formData,
+    });
+    expect(node.querySelector("select").value).eql("1");
+  });
+
   it("should assign a default value and set defaults on option change", () => {
     const { node, onChange } = createFormComponent({
       schema: {