Hello there! I'm trying to use for the first time the prefect automation system to send notification to a custom webhook of mine when a particular flow completes. I'm having troubles in understanding where I should put the "payload of the notification", i don't get if it is something that I should define in the automation -> actions -> body or I should leave this empty (or with the default values) and put the payload into the webhook -> JSON data. In the first case, I've tried and I get:

13:44:29.389 | WARNING | prefect.server.events.actions - Action failed: "The notification block was invalid: 1 validation error for CustomWebhookNotificationBlock\nparams\n  Input should be a valid dictionary [type=dict_type, input_value='', input_type=str]\n    For further information visit <https://errors.pydantic.dev/2.10/v/dict_type>"

using this the default values as automation body:

Flow run {{ flow.name }}/{{ flow_run.name }} observed in state {{ flow_run.state.name }} at {{ flow_run.state.timestamp }}.
Flow ID: {{ flow_run.flow_id }}
Flow run ID: {{ flow_run.id }}
Flow run URL: {{ flow_run|ui_url }}
State message: {{ flow_run.state.message }}

In the second case, If I try to set in the webhook JSON body something like:

{
"flow_run_id": {{ flow_run.flow_id }}
}

when saving the block from the GUI this modification is not applied (it only happens for the JSON part, not for all the other params. If I do it in other fields i.e. Form params I get that this templating is not allowed. I'm sure I'm missing something, thanks to everyone that will provide a clarification 🙂

Having the same issue