feat: new option expandSingleSchemaField

README.md

@@ -230,6 +230,7 @@ You can use all of the following options with standalone version on <redoc> tag
 * `hideHostname` - if set, the protocol and hostname is not shown in the operation definition.
 * `hideLoading` - do not show loading animation. Useful for small docs.
 * `hideSingleRequestSampleTab` - do not show the request sample tab for requests with only one sample.
+* `expandSingleSchemaField` - automatically expand single field in a schema
 * `jsonSampleExpandLevel` - set the default expand level for JSON payload samples (responses and request body). Special value 'all' expands all levels. The default value is `2`.
 * `lazyRendering` - _Not implemented yet_ ~~if set, enables lazy rendering mode in ReDoc. This mode is useful for APIs with big number of operations (e.g. > 50). In this mode ReDoc shows initial screen ASAP and then renders the rest operations asynchronously while showing progress bar on the top. Check out the [demo](\\redocly.github.io/redoc) for the example.~~
 * `menuToggle` - if true clicking second time on expanded menu item will collapse it, default `false`.

src/components/Fields/Field.tsx

@@ -23,6 +23,7 @@ export interface FieldProps extends SchemaOptions {
   showExamples?: boolean;
 
   field: FieldModel;
+  expandByDefault?: boolean;
 
   renderDiscriminatorSwitch?: (opts: FieldProps) => JSX.Element;
 }
@@ -30,13 +31,19 @@ export interface FieldProps extends SchemaOptions {
 @observer
 export class Field extends React.Component<FieldProps> {
   toggle = () => {
-    this.props.field.toggle();
+    if (this.props.field.expanded === undefined && this.props.expandByDefault) {
+      this.props.field.expanded = false;
+    } else {
+      this.props.field.toggle();
+    }
   };
   render() {
-    const { className, field, isLast } = this.props;
-    const { name, expanded, deprecated, required, kind } = field;
+    const { className, field, isLast, expandByDefault } = this.props;
+    const { name, deprecated, required, kind } = field;
     const withSubSchema = !field.schema.isPrimitive && !field.schema.isCircular;
 
+    const expanded = field.expanded === undefined ? expandByDefault : field.expanded;
+
     const paramName = withSubSchema ? (
       <ClickablePropertyNameCell
         onClick={this.toggle}
@@ -65,7 +72,7 @@ export class Field extends React.Component<FieldProps> {
             <FieldDetails {...this.props} />
           </PropertyDetailsCell>
         </tr>
-        {field.expanded && withSubSchema && (
+        {expanded && withSubSchema && (
           <tr key={field.name + 'inner'}>
             <PropertyCellWithInner colSpan={2}>
               <InnerPropertiesWrap>

src/components/Schema/ObjectSchema.tsx

@@ -9,6 +9,7 @@ import { DiscriminatorDropdown } from './DiscriminatorDropdown';
 import { SchemaProps } from './Schema';
 
 import { mapWithLast } from '../../utils';
+import { OptionsContext } from '../OptionsProvider';
 
 export interface ObjectSchemaProps extends SchemaProps {
   discriminator?: {
@@ -19,6 +20,8 @@ export interface ObjectSchemaProps extends SchemaProps {
 
 @observer
 export class ObjectSchema extends React.Component<ObjectSchemaProps> {
+  static contextType = OptionsContext;
+
   get parentSchema() {
     return this.props.discriminator!.parentSchema;
   }
@@ -41,6 +44,8 @@ export class ObjectSchema extends React.Component<ObjectSchemaProps> {
         })
       : fields;
 
+    const expandByDefault = this.context.expandSingleSchemaField && filteredFields.length === 1;
+
     return (
       <PropertiesTable>
         {showTitle && <PropertiesTableCaption>{this.props.schema.title}</PropertiesTableCaption>}
@@ -51,6 +56,7 @@ export class ObjectSchema extends React.Component<ObjectSchemaProps> {
                 key={field.name}
                 isLast={isLast}
                 field={field}
+                expandByDefault={expandByDefault}
                 renderDiscriminatorSwitch={
                   (discriminator &&
                     discriminator.fieldName === field.name &&

src/services/RedocNormalizedOptions.ts

@@ -26,6 +26,7 @@ export interface RedocRawOptions {
   jsonSampleExpandLevel?: number | string | 'all';
   hideSchemaTitles?: boolean | string;
   payloadSampleIdx?: number;
+  expandSingleSchemaField?: boolean | string;
 
   unstable_ignoreMimeParameters?: boolean;
 
@@ -160,6 +161,7 @@ export class RedocNormalizedOptions {
   enumSkipQuotes: boolean;
   hideSchemaTitles: boolean;
   payloadSampleIdx: number;
+  expandSingleSchemaField: boolean;
 
   /* tslint:disable-next-line */
   unstable_ignoreMimeParameters: boolean;
@@ -200,6 +202,7 @@ export class RedocNormalizedOptions {
     this.enumSkipQuotes = argValueToBoolean(raw.enumSkipQuotes);
     this.hideSchemaTitles = argValueToBoolean(raw.hideSchemaTitles);
     this.payloadSampleIdx = RedocNormalizedOptions.normalizePayloadSampleIdx(raw.payloadSampleIdx);
+    this.expandSingleSchemaField = argValueToBoolean(raw.expandSingleSchemaField);
 
     this.unstable_ignoreMimeParameters = argValueToBoolean(raw.unstable_ignoreMimeParameters);
 

src/services/models/Field.ts

@@ -30,7 +30,7 @@ function getDefaultStyleValue(parameterLocation: OpenAPIParameterLocation): Open
  */
 export class FieldModel {
   @observable
-  expanded: boolean = false;
+  expanded: boolean | undefined;
 
   schema: SchemaModel;
   name: string;