Azure 函数参数中的 DocumentClient 绑定

Question

我正在 F# 中编写一个 http 触发器 Azure 函数，并且我想绑定一个 DocumentClient 类型的参数，以便更好地控制在 Cosmos DB 中完成的查询。这是我目前所拥有的：

函数.fs

namespace Functions

open System
open System.Net
open System.Net.Http
open Newtonsoft.Json
open Microsoft.Azure.Documents
open Microsoft.Azure.Documents.Client
open Microsoft.Azure.WebJobs
open Microsoft.Azure.WebJobs.Host
open Microsoft.Azure.WebJobs.Extensions
open Microsoft.Azure.WebJobs.Extensions.DocumentDB

module Function = 
  let Run(req: HttpRequestMessage, [<DocumentDB>] client: DocumentClient, log: TraceWriter) =
    log.Info(sprintf "F# HTTP trigger function processed a request.")
    req.CreateResponse(HttpStatusCode.OK)

函数.json

{
  "disabled": false,
  "scriptFile": "..\\..\\..\\build\\Debug\\Functions\\Functions.dll",
  "entryPoint": "Functions.Function.Run",
  "bindings": [
    {
      "direction": "in",
      "type": "httpTrigger",
      "authLevel": "anonymous",
      "name": "req",
      "methods": [ "get" ],
      "route": "users"
    },
    {
      "direction": "in",
      "type": "documentDB",
      "name": "client",
      "connection": "COSMOSDB_CONNECTION_STRING"
    },
    {
      "direction": "out",
      "type": "http",
      "name": "res"
    }
  ]
}

host.json

{
  "frameworks": {
    "net46":{
      "dependencies": {
        "Dynamitey": "1.0.2",
        "FSharp.Interop.Dynamic": "3.0.0",
        "Microsoft.Azure.DocumentDB": "1.17.0",
        "Microsoft.Azure.WebJobs.Extensions.DocumentDB": "1.0.0"
      }
    }
  }
}

local.settings.json

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsDashboard": "",
    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
    "COSMOSDB_CONNECTION_STRING": "AccountEndpoint=https://localhost:8081;AccountKey=C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw==;"
  }
}

我正在使用开发存储和 Cosmos DB 模拟器在本地运行该功能。我试图将 C# 的 here 描述的内容翻译成 F#。它也与here 提到的几乎相同。但我只收到错误Microsoft.Azure.WebJobs.Extensions.DocumentDB: 'Id' is required when binding to a DocumentClient property。

Answer 1

this issue on Github 中提到了一种解决方法。它已在 tooling 中修复，将在下一个版本中提供

从 github 复制的解决方法

我发现了问题并提交了 https://github.com/Azure/azure-functions-cli/issues/206。最简单的 解决方法，直到我们有更新：

转到C:\Users\{user}\appdata\local\Azure.Functions.Cli\1.0.0。

在记事本中打开func.exe.config。

找到这个：

<dependentAssembly>
  <assemblyIdentity name="Microsoft.Azure.Documents.Client" publicKeyToken="31bf3856ad364e35" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-1.11.0.0" newVersion="1.11.0.0" />
</dependentAssembly>

在这两个地方，将1.11.0.0 替换为1.13.0.0，这样你最终会得到：

<dependentAssembly>
    <assemblyIdentity name="Microsoft.Azure.Documents.Client" publicKeyToken="31bf3856ad364e35" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-1.13.0.0" newVersion="1.13.0.0" />
  </dependentAssembly>

保存并重试。