Novu•8mo ago

Trigger a topic

Hey all! Today I updated the .NET SDK to the newest version and I try to send a notification to a topic. The novu.Event.TriggerTopicAsync method which is mentioned in https://docs.novu.co/quickstarts/.NET#sending-a-notification-to-a-topic is not available in the newest SDK version 0.3.3 When I just want to know which API I need to call, I checked out the API reference at https://docs.novu.co/api-reference but there is no API for sending a notification to a topic. Can someone tell me the API for sending a notification to a topic?

11 Replies

Gali Baum•8mo ago

var payloadTopic = new EventTopicTriggerDto
{
  EventName = "onboarding",
  Payload = onboardingMessage,
  To = { Type = "Topic", TopicKey = "frontend-users" },

};

var triggerTopic = await novu.Event.Trigger(payloadTopic);

var payloadTopic = new EventTopicTriggerDto
{
  EventName = "onboarding",
  Payload = onboardingMessage,
  To = { Type = "Topic", TopicKey = "frontend-users" },

};

var triggerTopic = await novu.Event.Trigger(payloadTopic);

@Sebastian Küsters could you please try something like this?

Sebastian Küsters•8mo ago

@Gali Baum thanks for the response - via the .NET SDK I can not extend the object dynamically like in node.js For that reason I think the best is that I get information about the API, so that I can do the call without using the SDK. Can you help me there?

Novu_Bot•8mo ago

@Sebastian Küsters, you just advanced to level 2!

Gali Baum•8mo ago

It is using same trigger endpoint https://docs.novu.co/api-reference. For a topic you ,the to attribute in the request is:

to:[{type: 'Topic', topicKey: <your-topic-key>}]

to:[{type: 'Topic', topicKey: <your-topic-key>}]

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Gali Baum•8mo ago

@Sebastian Küsters let me know if it works for you 🙂

Sebastian Küsters•8mo ago

Will try it out later - right now I am seeding the local setup. There I am facing some timeout issues agains Novu API when calling GET topics - need to check this first out. But I will update you as soon as I tried it. @Gali Baum today I found time to seed our new account in the EU region. I tried to trigger the topic as you descibed, but no success :/ Via .NET SDK the response is:

{"message":"workflow_not_found","error":"Unprocessable Entity","statusCode":422}

{"message":"workflow_not_found","error":"Unprocessable Entity","statusCode":422}

This is the .NET snippet:

var dto = new EventCreateData()
            {
                EventName = notification.WorkflowTriggerId,
                Payload = notification.Payload,
                Overrides = new
                {
                    Name = notification.WorkflowTriggerId,
                    To = new
                    {
                        Type = "Topic",
                        TopicKey = topicKey
                    }
                }
            };
            var novuResponse = await _novuClient.Event.Trigger(dto);

var dto = new EventCreateData()
            {
                EventName = notification.WorkflowTriggerId,
                Payload = notification.Payload,
                Overrides = new
                {
                    Name = notification.WorkflowTriggerId,
                    To = new
                    {
                        Type = "Topic",
                        TopicKey = topicKey
                    }
                }
            };
            var novuResponse = await _novuClient.Event.Trigger(dto);

Now I tried it via curl and get a successful reponse, but nothing happens and the Acitivy doesn't appear in the portal:

curl -X POST https://eu.api.novu.co/v1/events/trigger \
  -H "Authorization: ApiKey XXX" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "files-uploaded",
    "to": [
      {
        "type": "Topic",
        "topicKey": "files-uploaded_8979296d-0c0c-4d83-bd0e-d58e66fc8cc2"
      }
    ],
    "payload": {
      "folderName": "Hello World"
    }
  }'

curl -X POST https://eu.api.novu.co/v1/events/trigger \
  -H "Authorization: ApiKey XXX" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "files-uploaded",
    "to": [
      {
        "type": "Topic",
        "topicKey": "files-uploaded_8979296d-0c0c-4d83-bd0e-d58e66fc8cc2"
      }
    ],
    "payload": {
      "folderName": "Hello World"
    }
  }'

Response:

{"data":{"acknowledged":true,"status":"processed","transactionId":"0c291d7a-bbb6-4895-a869-50dca774a65e"}}

{"data":{"acknowledged":true,"status":"processed","transactionId":"0c291d7a-bbb6-4895-a869-50dca774a65e"}}

Pawan Jain•8mo ago

@sebastiankuesters Did you create this topic with key files-uploaded_8979296d-0c0c-4d83-bd0e-d58e66fc8cc2 before triggering the workflow using cURL I could not find this topic files-uploaded_8979296d-0c0c-4d83-bd0e-d58e66fc8cc2 I see in logs Topic with key files-uploaded_8979296d-0c0c-4d83-bd0e-d58e66fc8cc2 not found in current environment

Sebastian Küsters•8mo ago

@Pawan Jain thanks for the hint - I will double check it... @Pawan Jain thanks for sharing the information - now it works. Maybe improve the error message here - because workflow_not_found is misleading. Moreover I have to tell you that I wrote this so fast without investigation, because you describe nowhere in your docs how to actually trigger a topic. Only thanks to the hint by @Gali Baum here https://discordapp.com/channels/895029566685462578/1166659906460463165/1166673489869164564 I got a hint. It's just feedback to improve the docs - beside that thanks you both for the great support here 🙏

Pawan Jain•8mo ago

Hi @Sebastian Küsters Thanks for sharing it worked. We will update the docs

empe•8mo ago

Do we have a ticket for that?

Pawan Jain•8mo ago

Yes we have https://linear.app/novu/issue/NV-3150/topic-not-found-error-in-activity-feed-or-in-response

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Trigger a topic