JSON query parameter accepting array of objects is stringified twice

[timdream]

Q&A (please complete the following information)

• Swagger-UI version: (Version on https://editor-next.swagger.io)
• Swagger/OpenAPI version: 3.1.0

Content & configuration

Example Swagger/OpenAPI definition:

{
    "openapi": "3.1.0",
    "info": {
        "title": "Server",
        "version": "0.0.1"
    },
    "paths": {
        "/endpoint": {
            "get": {
                "responses": {
                },
                "parameters": [
                    {
                        "name": "param",
                        "in": "query",
                        "description": "a param that accepts an array of objects",
                        "content": {
                            "application/json": {
                                "schema": {
                                    "type": "array",
                                    "maxItems": 10,
                                    "items": {
                                        "type": "object",
                                        "properties": {
                                            "a": {
                                                "type": "string"
                                            },
                                            "b": {
                                                "type": "number"
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                ]
            }
        }
    }
}

Describe the bug you're encountering

The above query parameter produces an encoded URI string that was JSON-stringified twice.

To reproduce...

Steps to reproduce the behavior:

1. Go to https://editor-next.swagger.io
2. Copy and paste the OpenAPI spec
3. Expand the endpoint definition on the UI and click [Try it out]
4. Click [Add object item]
5. Click [Execute]
6. Inspect the generated URL

Expected behavior

Expected the following URL, encodes [{\n "a": "string",\n "b": 0\n}]

https://raw.githubusercontent.com/endpoint?param=
%5B%7B%0A%20%20%22a%22%3A%20%22string%22%2C%0A%20%20%22b%22%3A%200%0A%7D%5D

Actual behavior

Object is JSON-stringified twice. The generated URL encodes ["{\\n \\"a\\": \\"string\\",\\n \\"b\\": 0\\n}"], i.e., a JSON string in a JSON array.

https://raw.githubusercontent.com/endpoint?param=
%5B%22%7B%5Cn%20%20%5C%22a%5C%22%3A%20%5C%22string%5C%22%2C%5Cn%20%20%5C%22b%5C%22%3A%200%5Cn%7D%22%5D

Screenshots