@Marvin I have a webhook set up in Prefect. I can successfully POST to that webhook from another system. When I open an event from that webhook, I see this in the "Raw" tab:

{
  "id": "dc87b98b-8c86-4d5c-b9ec-401bad73a0e5",
  "account": "cf7f2024-038d-4c0c-87b3-8ad9f1e282f1",
  "event": "amazon-sales-file-received",
  "occurred": "2025-03-20T15:26:08.121Z",
  "payload": {
    "body": {
      "file_name": "50340019619.txt"
    }
  },
  "received": "2025-03-20T15:26:08.122Z",
  "related": [
    {
      "prefect.resource.id": "prefect-cloud.webhook.9d18cf1c-388c-478d-a9d3-d5a697f78a25",
      "prefect.resource.name": "Amazon Sales File",
      "prefect.resource.role": "webhook"
    }
  ],
  "resource": {
    "prefect.resource.id": "prefect-cloud.webhook.9d18cf1c-388c-478d-a9d3-d5a697f78a25",
    "prefect.resource.name": "Amazon Sales File"
  },
  "workspace": "26ffaf55-b77d-4b2f-bf50-9331e8aed5c4"
}

I have an automation set up with a custom trigger that runs a deployment when it observes the above event. The deployment has a parameter named

file_name

and I want to pass the

file_name

from the "Raw" tab shown above to this parameter. In this case, it should be "50340019619.txt". How do I do this?

To pass the

file_name

from the webhook event to your deployment parameter, you can utilize Prefect's ability to handle dynamic webhook events. When setting up your automation, ensure that your trigger is configured to extract the

file_name

from the event's payload and pass it as a parameter to the deployment. Here's a concise guide to achieve this: 1. Webhook Trigger Setup: Ensure your webhook trigger is correctly set up to listen for the specific event type, in this case,

"amazon-sales-file-received"

. 2. Parameter Mapping: When defining the automation, map the

file_name

from the webhook's

payload.body.file_name

to the deployment parameter. This involves using Prefect's automation configuration to extract and pass parameters dynamically. 3. Example Configuration: While I can't provide the exact syntax without more specific details from the Prefect docs, the general idea is to configure your automation to read the

payload

and extract

file_name

like so:

yaml
   automations:
     - trigger: webhook
       event: amazon-sales-file-received
       parameters:
         file_name: "{{ payload.body.file_name }}"

4. Documentation Reference: For more detailed instructions, refer to the Prefect Webhook Triggers Documentation. If you need further assistance with specific YAML configuration or automation setup, feel free to ask.

@Marvin Do I need to enclose the event value in double quotes?

Yes, when specifying string values in YAML, such as the event type

"amazon-sales-file-received"

, it is a good practice to enclose them in double quotes. This ensures that the value is interpreted correctly, especially if it contains special characters or spaces. Here's how you should format it:

yaml
automations:
  - trigger: webhook
    event: "amazon-sales-file-received"
    parameters:
      file_name: "{{ payload.body.file_name }}"

Using double quotes helps avoid any potential parsing issues. If you have any further questions or need additional guidance, feel free to ask.