Support arrays as query parameters

[mattyb]

Standard libraries construct array query parameters as below:

http://hostname/endpoint?colors[]=blue&colors[]=green

If plumber sees this for an endpoint with a colors parameter, it should construct a list and pass it to the function.

[meztez]

Square bracket are kind of not supported in the query parameter per RFC 3986

Currently, it should work when using http://hostname/endpoint?colors=blue&colors=green and treating colors as a vector (not a list) in your plumber.R function.

library(plumber)

#* Sort letters
#* @param letters
#* @json
#* @get /letters
function(letters) {
  sort(letters)
}

http://hostname:port/letters?letters=t&letters=a&letters=z&letters=f&letters=e

["a","e","f","t","z"]

But something could be done by defining plumber param as

#* @param number:numeric[] a numeric array

so that the Swagger UI picks it up since it is supported in OpenApi

Would need to modify the following, obviously dynamically.

ret$paths$`/letters`$get$parameters[[1]]$schema$type = "array"
ret$paths$`/letters`$get$parameters[[1]]$schema$items$type = "integer"
ret$paths$`/letters`$get$parameters[[1]]$style = "form"
ret$paths$`/letters`$get$parameters[[1]]$explode = "true"
ret$paths$`/letters`$get$parameters[[1]]$schema$minItems = "1"