如何在开发 Azure Durable Function 时使 Activity 函数接受 json 输入 (Python)

Question

我有 Azure 持久功能。它主要基于： https://docs.microsoft.com/en-us/azure/azure-functions/durable/quickstart-python-vscode

我正在尝试将常规 HTTP 触发器迁移为持久函数吗？

我已修改代码以在 HTTP 启动和 Orchestrator 函数中接受 json。但是 Activity 函数不能接受 json。如何修改HelloActivity接受json？下一行似乎会引起问题。

def main(datajson: str) -> str:

你好Orchestrator：

import logging
import json

import azure.functions as func
import azure.durable_functions as df


def orchestrator_function(context: df.DurableOrchestrationContext):

    # Take the json data from the DurableOrchestrationContext, which was passed during the invocation
    data = context._input
    data = json.loads(data)
    logging.info(f"Orchestrator: Input is: {data}")
    
    result1 = yield context.call_activity('HelloActivity', data)
    #result1 = yield context.call_activity('HelloActivity', "ThisWouldWork")

    return [result1]
    main = df.Orchestrator.create(orchestrator_function)

你好Activity

import logging

def main(datajson: str) -> str:
    logging.info(f"Activity datajson :" + datajson)
    return f"Hello world"

错误：

Function 'HelloOrchestrator (Orchestrator)' failed with an error. Reason: Message: 
Activity function 'HelloActivity' failed:  TypeError: can only concatenate str (not 
"dict") to str 
 {"$type":"System.Exception, 
System.Private.CoreLib","ClassName":"System.Exception","Message":" TypeError: can only 
concatenate str (not \"dict\") to str","Data":null,"InnerException":{"$type":"Microsoft.Azure.WebJobs.Script.Workers.Rpc.RpcException,

Answer 1

谢谢@John Hanley，您的建议将其作为答案发布以帮助其他社区。

Reason: Message:  Activity function 'HelloActivity' failed: 
TypeError: can only concatenate str (not  "dict") to str  ```

对于上述错误：

" 你的错误是这一行 logging. info(f"Orchestrator: Input is: {data}"), 传递原始字符串 (context._input) 而不是 dictionary 对象 ."

有关详细信息，请参阅此 Blog。

如何在开发 Azure Durable Function 时使 Activity 函数接受 json 输入 (Python)

How to make Activity Function to accept json input when developing Azure Durable Function (Python)

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