ServiceBusTrigger values in function.json not as defined in yml

[ianrandell-sh]

This is a Bug Report

Description

• What went wrong? the deployed function.json does not include the queueName or connection in the serverless.yml. Instead it includes the queueName and connection as defined in the c# ServiceBusTrigger attribute

• What did you expect should have happened? I expected the serverless plugin to set the values in function.json to whats defined in the yaml

• What was the config you used?

serverless.yml:

service: oscarsinkfunc-app

# You can pin your service to only deploy with a specific Serverless version
# Check out our docs for more details
frameworkVersion: '2'

provider:
  name: azure
  region: West Europe
  runtime: dotnet3.1
  prefix: "ianr"
  subscriptionId: ...redacted...
  stage: dev

  environment: 
    SERVICE_BUS_CONNECTION: '...redacted...'
    
plugins: 
  - serverless-azure-functions

functions:
  oscarsinkfunc:
    handler: src/handlers/oscarsinkfuncclass.main
    events:
      - serviceBus: true
        name: message 
        queueName: myqueue
        accessRights: listen
        connection: SERVICE_BUS_CONNECTION

c#:

using Microsoft.Azure.WebJobs;
using Microsoft.Extensions.Logging;
using System;

namespace myNamespace
{
    public static class oscarsinkfuncclass
    {
        [FunctionName("oscarsinkfuncname")]
        public static void Run(
            [ServiceBusTrigger("blahqueue", Connection = "blahconnection")]
            string message,
            ILogger log)
        {
            log.LogInformation($"C# ServiceBus queue trigger function {nameof(oscarsinkfuncclass)} processed message: {message ?? "(null)"}");
        }

Resulting function.json (taken from the azure portal via func -> code+test):

{
  "generatedBy": "Microsoft.NET.Sdk.Functions-3.0.9",
  "configurationSource": "attributes",
  "bindings": [
    {
      "type": "serviceBusTrigger",
      "connection": "blahconnection",
      "queueName": "blahqueue",
      "isSessionsEnabled": false,
      "name": "message"
    }
  ],
  "disabled": false,
  "scriptFile": "../bin/OscarSinkFunctionApp.dll",
  "entryPoint": "myNamespace.oscarsinkfuncclass.Run"
}

• What stacktrace or error message from your provider did you see? No error - deploys fine but the queueName and connection strings are obviously wrong.

Similar or dependent issues:

• #485

Additional Data

• Serverless Framework Version you're using: 2.10.0
• Serverless CLI Version you're using:
• Serverless Azure Plugin Version you're using: 2.1.0
• Operating System: Windows 10
• Stack Trace: n/a
• Provider Error messages: n/a

[ianrandell-sh]

additionally, setting the values to null in c# does not work

[ServiceBusTrigger(null, Connection = null)]

the function.json (from the zip in .serverless) is missing the values entirely:

"bindings": [
    {
      "type": "serviceBusTrigger",
      "isSessionsEnabled": false,
      "name": "message"
    }
  ],

[ianrandell-sh]

FYI the workaround I'm using is to use the %% syntax for the c# queue prop:

[ServiceBusTrigger("%SERVICE_BUS_QUEUE_NAME%", Connection = "SERVICE_BUS_CONNECTION")]

and then define the queue name as env var in the serverless.yml:

  environment:
    SERVICE_BUS_CONNECTION: '...redacted...'
    SERVICE_BUS_QUEUE_NAME: '...redacted...'