[Question] How to use id[]=1&id[]=2 when requestBody format is application/x-www-form-urlencoded

When the requestBody format is application/x-www-form-urlencoded, the server receives an array of ids as follows:

id[]=1&id[]=2

curl --location 'http://localhost/api/users' \
--header 'Content-Type: application/x-www-form-urlencoded' \
--data-urlencode 'id%5B%5D=1' \
--data-urlencode 'id%5B%5D=2'

openapi-generator-cli command simply:

npx @openapitools/openapi-generator-cli generate -g typescript-axios

But, it is automatically changed as follows

id[]=1,2

localVarFormParams.set('id[]', id.join(base_1.COLLECTION_FORMATS.csv));

So I commented out the generated code and wrote it like this:

// localVarFormParams.set('id[]', id.join(base_1.COLLECTION_FORMATS.csv));
id.forEach(id => localVarFormParams.append('id[]', id));

But if it is converted like this, the server cannot interpret it.

So, I want to know if there is an option to send it as I want.

• https://swagger.io/docs/specification/v3_0/serialization/
• https://github.com/swagger-api/swagger-ui/issues/4836

I know that options like style and explode in the link above cannot be used in requestBody.

Start at the generated typescript-axios form-parameter serialization shown in the issue and trace how application/x-www-form-urlencoded arrays are represented. Reproduce the id[]=1&id[]=2 case from the issue, then verify that the generated output preserves repeated fields rather than comma-joining them.