Typing: API does not allow passing additional properties

[msw-kialo]

GitHub deployments API includes a payload field. That can be JSON payload (either as string or directly embedded).

It is currently documented as:

payload:
  oneOf:
    - type: object
      additionalProperties: true
    - type: string
      description: JSON payload with extra information about the deployment.
      default: ''

it is currently typed as

class ReposOwnerRepoDeploymentsPostBodyPropPayloadOneof0Type(TypedDict):
    """ReposOwnerRepoDeploymentsPostBodyPropPayloadOneof0"""

However, TypedDict do not allow additional fields at the moment (PEP 728 – TypedDict with Typed Extra Items):

from githubkit.versions.latest.types import ReposOwnerRepoDeploymentsPostBodyPropPayloadOneof0Type

empty : ReposOwnerRepoDeploymentsPostBodyPropPayloadOneof0Type = {}

some_field_bool : ReposOwnerRepoDeploymentsPostBodyPropPayloadOneof0Type = {"downtime": False}
some_field_str : ReposOwnerRepoDeploymentsPostBodyPropPayloadOneof0Type = {"downtime": "false"}

Results in typing issues with at least pyright and mypy

> pyright
payload_test.py
  payload_test.py:5:77 - error: Type "dict[str, bool]" is not assignable to declared type "ReposOwnerRepoDeploymentsPostBodyPropPayloadOneof0Type"
    "downtime" is an undefined item in type "ReposOwnerRepoDeploymentsPostBodyPropPayloadOneof0Type" (reportAssignmentType)
  payload_test.py:6:76 - error: Type "dict[str, str]" is not assignable to declared type "ReposOwnerRepoDeploymentsPostBodyPropPayloadOneof0Type"
    "downtime" is an undefined item in type "ReposOwnerRepoDeploymentsPostBodyPropPayloadOneof0Type" (reportAssignmentType)
2 errors, 0 warnings, 0 informations 
> mypy
payload_test.py:5: error: Extra key "downtime" for TypedDict "ReposOwnerRepoDeploymentsPostBodyPropPayloadOneof0Type"  [typeddict-unknown-key]
payload_test.py:6: error: Extra key "downtime" for TypedDict "ReposOwnerRepoDeploymentsPostBodyPropPayloadOneof0Type"  [typeddict-unknown-key]
I think for the time being additionalProperties: true must allow a plain dict?

Therefore, in a type-safe practice create_deployment and async_create_deployment can only be used with strings but not dicts (as the schema should allow).