Array type in query parameters

[MalpenZibo]

Hi, I'm currently trying to use Zodios to specify a GET endpoint that receives an array of values as a query parameter. I have to respect an existing open API spec that defines that query parameter as a style: form, explode: false format (https://swagger.io/docs/specification/serialization/) so I have to accept a query string like /endpointName?id=3,4,5.

I defined the endpoint with the following code

...
{
    name: "id",
    type: "Query",
    schema: z.array(z.string()).optional().default([]),
},
...

but it works only with query strings like /endpointName?id=1&id=2&id=3 or /endpointName?id=[1,2,3].

I tried with the following code

...
{
    name: "id",
    type: "Query",
    schema: z.string().transform((v) => v.split(",")).pipe(z.array(z.string()).optional().default([])),
},
...

but then the generated client accepts only a string as an id parameter, not an array.

There's a way to make this work?

[Ackincolor]

You can try to configure paramsSerializer of axios. paramsSerializer Option

[MalpenZibo]

Changing the axios paramsSerializer doesn't change only how the zodios client sends the request? Because in my case the zodios client is not used

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[ecamellini]

I'm having the same issue, could this issue be reopened/discussed @ecyrbe ?

@Ackincolor I don't think this is related to Axios. When the open-api specifies explode: false and style: form, as far as I understand, /endpointName?id=3,4,5 is the expected format. So, it should be supported by the Zodios-generated decoder.

In these cases Zodios should generate a decoder like:

z.string().transform((s: string) => s.split(",")).pipe(z.array(z.string()).optional().default([]));

Or maybe a union of the two approaches to accept them both, like:

z.union([
   z.string().transform((s: string) => s.split(",")).pipe(z.array(z.string()).optional().default([])),
   z.array(z.string()).optional().default([])
])