amoghrajesh commented on code in PR #44605:
URL: https://github.com/apache/airflow/pull/44605#discussion_r1869560248
##########
task_sdk/src/airflow/sdk/api/client.py:
##########
@@ -169,6 +169,19 @@ def get(self, dag_id: str, run_id: str, task_id: str, key:
str, map_index: int =
resp = self.client.get(f"xcoms/{dag_id}/{run_id}/{task_id}/{key}",
params={"map_index": map_index})
return XComResponse.model_validate_json(resp.read())
+ def set(
+ self, dag_id: str, run_id: str, task_id: str, key: str, value,
map_index: int | None = None
+ ) -> dict[str, bool]:
+ """Set a XCom value via the API server."""
+ params = {}
+ if map_index:
+ params = {"map_index": map_index}
+ self.client.post(f"xcoms/{dag_id}/{run_id}/{task_id}/{key}",
params=params, json=value)
Review Comment:
Tried with map_index as a query param and it works:

Even its usage in
https://github.com/apache/airflow/blob/main/airflow/api_fastapi/core_api/routes/public/xcom.py#L57
hints that it is a query param.
Even tests for that matter:
```
response = test_client.get(
"/public/dags/~/dagRuns/~/taskInstances/~/xcomEntries",
params={"map_index": map_index} if map_index is not None else
None,
)
```
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