将Firestore与Azure Functions V2（C＃）结合使用

Question

I am trying to use Firestore with Azure Functions, but I'm getting the following error:

System.Private.CoreLib: Exception while executing function: HelloWorld. Grpc.Auth: Could not load type 'Grpc.Core.CallCredentials' from assembly 'Grpc.Core.Api, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad'.

I tried to use the steps from this question:

Grpc.Auth: Could not load type 'Grpc.Core.CallCredentials' from assembly 'Grpc.Core.Api'

however, it's related to the Language APIs, and the solution doesn't work for Firestore.

I tried changing the version of Grpc.Auth to 1.19.0, but this version doesn't appear to be supported by Firestore 1.0.0.

If I remove Firestore from the project and use grps.Auth 1.19.0 to initialize the Credentials object - this works. But the object isn't compatible with Firestore.

I also tried the PostBuild / PostPublish commands described in that question, but the commands fail to execute.

Before trying to use Firestore with Azure Functions, I successfully managed to use it with a .NET Core Web API project, but I'm struggling with Azure Functions and would appreciate any help.

Answer 1

It seems that it is a bug in Azure Functions and you could refer to this issue to track it.

If you update the cli directory to contain the relevant files from Grpc.Core and Grpc.Core.Api , and update func.deps.json accordingly, it all works - including Google.Cloud.Firestore .

So basically, this is a problem for any function needing to use a version of Grpc.Core later than the one embedded in the CLI application.