How to serialize query object with custom delimeter - swagger

Question

I have yaml file:
openapi: 3.0.1
info:
title: My API
version: v1
paths:
# /users;id=3;id=4?metadata=true
/users:
get:
parameters:
- in: query
name: offset
schema:
type: integer
description: The number of items to skip before starting to collect the result set
- in: query
name: limit
schema:
type: integer
description: The numbers of items to return
- in: query
name: origin
style: form
explode: false
schema:
type: object
properties:
city:
type: string
zip:
type: string
responses:
'200':
description: A list of users
When I click "execute" in https://editor.swagger.io, the generated Curl looks like this:
curl -X GET "https://editor.swagger.io/users?offset=2&limit=12&origin=city,atlanta,zip,303" -H "accept: */*"
However, I need it to be like this:
curl -X GET "https://editor.swagger.io/users?offset=2&limit=12&origin=city:atlanta|zip:303" -H "accept: */*"
Is it possible to do this? I could not find any info in documentation about setting custom delimeters.

Answer 1

Short answer: No.
Your specific use case isn't covered by serialize parameters and they follow the rfc6570 - it's a good idea to follow the standard if you want to design a well accepted web api.
You specified explode: false and style:form.
When you turn explode:true on you will get this instead:
city=atlanta&zip=303
When you specify style:deepObject you will get:
origin[city]=atlanta&origin[zip]=303
The spaceDelimited and pipeDelimited style won't work with objects.
Working without schema
You can of cause work without a schema and define your origin query parameter of type string.
The documentation should explain exactly what you expect and a little example will help people to use your API.
I won't use that pattern for an open API, but this can be a workaround for an internal API.