[BUG] SignalRTrigger CosmosDB input binding - InvocationContext.UserId

[tonyhallett]

Library name and version

Microsoft.Azure.WebJobs.Extensions.SignalRService ( 1.9.0 ), Microsoft.Azure.WebJobs.Extensions.CosmosDB ( 4.2.0), Microsoft.NET.Sdk.Functions ( 4.1.3)

Describe the bug

Given a generic ServerlessHub that successfully negotiates I have the following function invoked from the signalR client

        [FunctionName(nameof(InitialPlayerData))]
        public Task InitialPlayerData(
            [SignalRTrigger] InvocationContext invocationContext,
            [CosmosDB("Crib", "Players", Connection = "CosmosConnectionString", Id = "{UserId}", PartitionKey = "{UserId}")] Player player,
            ILogger logger)
        {
           .....

        }

Can I bind the UserId parameter ?

I checked with ChatGPT and it agreed that the CosmosDB attribute appeared correct.

If I change to using the CosmosClient directly the function is executed

        [FunctionName(nameof(InitialPlayerData))]
        async public Task InitialPlayerData(
            [SignalRTrigger] InvocationContext invocationContext,
            [CosmosDB(Connection = "CosmosConnectionString")] CosmosClient cosmosClient,
            ILogger logger)
        {  //.......

Expected behavior

Should bind.

Actual behavior

Does not bind.

Reproduction Steps

Not the easiest thing to reproduce given that requires an authentication service, a client app and azure configuration.

I can provide further details but I would just like to know if it is possible to bind to the UserId property.

[CosmosDB("Crib", "Players", Connection = "CosmosConnectionString", Id = "{UserId}", PartitionKey = "{UserId}")]

Environment

Azure Functions.

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <AzureFunctionsVersion>v4</AzureFunctionsVersion>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.CosmosDB" Version="4.2.0" />
    <PackageReference Include="Microsoft.Azure.WebJobs.Extensions.SignalRService" Version="1.9.0" />
    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="4.1.3" />
  </ItemGroup>

Visual Studio 17.5.1

[jsquire]

This issue has been transferred to the repository where the Microsoft.Azure.WebJobs.Extensions.CosmosDB package is maintained as #843