Serialisation issue when making OAuth Request. Latest SDK ("pipedrive/pipedrive": "^17.8")

[StyxOfDynamite]

It looks like deal field serialisation / de-serialisation is failing.

php -r '
require "vendor/autoload.php";
$json = json_decode(json_encode([
  "success" => true,
  "data" => [[
    "id" => 1, "key" => "channel", "name" => "Channel", "field_type" => "enum",
    "options" => [["id" => 1, "label" => "Partner.io"]],
  ]],
]));
try {
  $r = \Pipedrive\versions\v2\ObjectSerializer::deserialize($json, "\\Pipedrive\\versions\\v2\\Model\\GetDealFields");
  var_dump($r);
} catch (\Throwable $e) {
  echo get_class($e), ": ", $e->getMessage(), "\n";
  echo "is Exception? ", ($e instanceof \Exception ? "yes" : "NO"), "\n";
}
'

Error: Class "OneOfIntegerString" not found
is Exception? NO

[StyxOfDynamite]

Root cause

It's a codegen bug in the SDK, not in our code or our OAuth setup.

vendor/pipedrive/pipedrive/lib/versions/v2/Model/ActivityFieldItemOptions.php:69 declares:

'id' => 'OneOfIntegerString',

There is no OneOfIntegerString class anywhere in the package only that type-map string and a dangling docs link. ObjectSerializer::deserialize() falls through its primitive checks and does new $class(), which fatals.

Introduced in 17.3.1 (changelog line 81): "Fixed option_id field type in v2 field schemas … changed from integer to integer | string". The generator rendered oneOf: [integer, string] as a type name and never emitted the class. Still broken in 17.8.2, which is the newest stable — so there's no version in ^17.8 that fixes it.