@Marvin Inside the on_failure hook, how can I get the url of the run?

To get the URL of the run in the

on_failure

hook, you can use Prefect's state change hooks and

PREFECT_API_URL

setting. Here's an example of how to do it:

python
from prefect import flow
from prefect.blocks.core import Block
from prefect.settings import PREFECT_API_URL

def notify_slack(flow, flow_run, state):
    slack_webhook_block = Block.load("slack-webhook/my-slack-webhook")
    slack_webhook_block.notify(
        (
            f"Your job {flow_run.name} entered {state.name} "
            f"with message:\n\n"
            f"See <https://{PREFECT_API_URL.value()}/flow-runs/"
            f"flow-run/{flow_run.id}|the flow run in the UI>\n\n"
            f"Tags: {flow_run.tags}\n\n"
            f"Scheduled start: {flow_run.expected_start_time}"
        )
    )

@flow(on_failure=[notify_slack], retries=1)
def failing_flow():
    raise ValueError("oops!")

if __name__ == "__main__":
    failing_flow()

In this example, the

PREFECT_API_URL

setting and the

flow_run.id

are used to construct the URL for the flow run. You can adjust the notification message as needed. For more information, you can refer to the Prefect Docs on state change hooks.

Can you show me the same but for email? The body of the email should contain a url that points to the run itself.