How to read a memo attached to a Temporal workflow using TypeScript?

Question

I successfully called upsertMemo in an Activity, but WorkflowExecutionInfo.memo is still empty when I look for it in a list of all worfklow executions obtained via TemporalClient.workflowService.listWorkflowExecutions.

This is my worker code:

const fieldValue = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
upsertMemo({'fieldName': fieldValue});
console.log(`Memo set to ${JSON.stringify(workflowInfo().memo)}`);

Output:

Memo set to {"fieldName":"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"}`

This is my consumer code:

const client: Client = await this.temporalService.getClient();
const workflowExecutions = await client.workflowService.listWorkflowExecutions({
  query: "WorkflowType = 'workflowName'", 
  namespace: 'default',            
});
const ids = [];
for await (const execution of workflowExecutions.executions) {
  console.log(`Found workflow ${execution.execution?.workflowId}`);
  const memo = execution.memo;
  console.log(`Memo = ${JSON.stringify(memo)} (${memo})`);
}
O

Output:

Found workflow 2c81a11a-512a-4e56-88b8-00ea5762f81d
Memo = {} ([object Object])

I expected to get {"fieldName":"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"} again.

What’s going on here in your opinion?

Thank you for your help.

Iaroslav Sobolev · Accepted Answer · 2025-05-06 05:07:28Z

0

External visibility store does not receive memo updates from upsert's. You will only see the updated memo from within your workflow, and workflowExecutions.executions will only see the initial state of the memo. The best comes to mind is search attributes. https://docs.temporal.io/visibility https://docs.temporal.io/develop/typescript/observability#visibility

answered May 6 at 5:07

Iaroslav Sobolev

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