Swagger UI displaying array example as null - swagger

Question

I use OpenAPI 3.0.0 and want to pass an array of Items as a parameter in the requestBody. My API definition looks like this:
post:
tags:
- test
summary: Test dummy
operationId: requestBodyTests
requestBody:
description: test the body
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/Items'
components:
schemas:
Items:
type: array
items:
$ref: '#/components/schemas/Item'
examples:
- id: bla
text: blubb
- id: bla
text: blubb
Item:
type: object
properties:
id:
type: string
name:
type: string
Swagger UI displays the request body example as follows:
and the request body schema as follows:
Why does it show an orderedmap instead of my normal objects?
Can someone tell me how to do the spec right for having the array with items correct?

Answer 1

Examples inside schemas use the example keyword (singular), not examples (plural).
Also, your YAML indentation is wrong - Items and Item must be indented under schemas, list items in the example must have the same indent, etc. If you paste your spec into http://editor.swagger.io, it will point out syntax errors.
Here's the fixed version:
components:
schemas:
Items:
type: array
items:
$ref: '#/components/schemas/Item'
example: # <------
- id: bla
text: blubb
- id: bla
text: blubb
Item:
type: object
properties:
id:
type: string
name:
type: string

Answer 2

Moreover, you get an example as 'orderedmap' because the example field is A free-form property.
But represent examples that cannot be naturally represented in JSON or YAML, a string value can be used to contain the example with escaping where necessary. (OpenAPI spec)
We can write an example as 'string' in both ways:
1.
example: '[ currency: USD, amount: 123 ]'
example: |
[
currency: USD,
amount: 123
]