Add support for anyoneof object primitive (#894)

* add support for anyoneof object primitive

* add example response for testing

* update test snapshot

* handle object primitive separately to ensure no properties exist

* update test snapshot

Author: sserrata

demo/examples/petstore.yaml

@@ -115,6 +115,17 @@ paths:
       description: Add new pet to the store inventory.
       operationId: addPet
       responses:
+        "200":
+          description: All good
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  data:
+                    oneOf:
+                      - type: string
+                      - type: object
         "405":
           description: Invalid input
       security:

packages/docusaurus-plugin-openapi-docs/src/markdown/createSchema.ts

@@ -73,6 +73,15 @@ function createAnyOneOf(schema: SchemaObject): any {
             : `MOD${index + 1}`;
           const anyOneChildren = [];
 
+          if (
+            anyOneSchema.type === "object" &&
+            !anyOneSchema.properties &&
+            !anyOneSchema.allOf &&
+            !anyOneSchema.items
+          ) {
+            anyOneChildren.push(createNodes(anyOneSchema, SCHEMA_TYPE));
+          }
+
           if (anyOneSchema.properties !== undefined) {
             anyOneChildren.push(createProperties(anyOneSchema));
             delete anyOneSchema.properties;