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Sql bind in Azure Function

I'm trying to use Sql output binding functionalities for Azure function.
Below is my current configuration. I'm using Visual Studio Code as IDE
Found Python version 3.9.0 (py).
Core Tools Version: 4.0.4736 Commit hash: N/A (64-bit)
Function Runtime Version: 4.8.1.18957
Extension bundle version: "[4.*, 5.0.0)"
functions.json :
{
"scriptFile": "__init__.py",
"bindings": [
{
"authLevel": "anonymous",
"type": "httpTrigger",
"direction": "in",
"name": "req",
"methods": [
"post"
]
},
{
"type": "http",
"direction": "out",
"name": "$return"
},
{
"name": "transactions",
"type": "sql",
"direction": "out",
"commandText": "dbo.[table]",
"connectionStringSetting": "Driver={ODBC Driver 13 for SQL Server} etcetc."
}
]
}
init.py
import logging
import json
import azure.functions as func
def main(
req: func.HttpRequest, transactions: func.Out[func.SqlRow]
) -> func.HttpResponse:
logging.info("Python HTTP trigger function processed a request.")
# i'm using Vue JSON.Stringify({}) in the POST method...on client side
body = json.loads(req.get_body())
row = func.SqlRow.from_dict(body)
transactions.set(row)
return func.HttpResponse(
body=json.dumps(body), status_code=201, mimetype="application/json"
)
Error :
[2022-09-12T17:49:13.731Z] Executed 'Functions.RegisterNewBatch' (Failed, Id=..., Duration=9ms)
[2022-09-12T17:49:13.732Z] System.Private.CoreLib: Exception while executing function:
Functions.RegisterNewBatch. Microsoft.Azure.WebJobs.Host:
Error while handling parameter _binder after function returned:
Microsoft.Data.SqlClient: The ConnectionString property has not been initialized.
Can you please help on that.

Value for ConnectionString must be included in local.settings.json (not env variable).

Check your binding declaration in function.json and the ConnectionString in your local.settings.json
Here is a full sample for input and output bindings:
https://github.com/DFMERA/azure-functions-sql-binding
Blog Post:
https://acelera.tech/2023/02/10/azure-functions-sql-binding-con-python/

Azure function timeTrigger is not present in portal

I have an azure function app running in Linux system. In it, I have create two functions, one is triggered by a blob trigger and the other with timetrigger.
Both functions are deployed with azure DevOps but when I go to portal, timetrigger function is not present.
To deploy the functions, I have the code in Git repository and it is copied to a .zip folder to build the artifact. Once artifact is built, it is deployed to function app with azure cli.
Code:
function.json
{
"schedule": "0 30 14 * * *",
"name": "myTimer",
"type": "timerTrigger",
"direction": "in",
"runOnStartup": false
}
host.json
{
"version": "2.0",
"logging": {
"fileLoggingMode": "always",
"applicationInsights": {
"samplingSettings": {
"isEnabled": true
}
}
},
"extensions": {
"queues": {
"maxPollingInterval": "00:00:02",
"visibilityTimeout" : "00:00:30",
"batchSize": 8,
"maxDequeueCount": 5,
"newBatchThreshold": 4,
"messageEncoding": "base64"
}
},
"extensionBundle": {
"id": "Microsoft.Azure.Functions.ExtensionBundle",
"version": "[3.3.0, 4.0.0)"
},
"functionTimeout": "-1",
"retry": {
"strategy": "fixedDelay",
"maxRetryCount": 0,
"delayInterval": "00:00:05"
}
}
init.py
import datetime
import logging
import azure.functions as func
def main(mytimer: func.TimerRequest) -> None:
utc_timestamp = datetime.datetime.utcnow().replace(
tzinfo=datetime.timezone.utc).isoformat()
if mytimer.past_due:
logging.info('The timer is past due!')
logging.info('Python timer trigger function ran at %s', utc_timestamp)
SOLUTION
I had wrong configured function.json file. Correct content is:
{
"bindings": [
{
"schedule": "0 30 14 * * *",
"name": "myTimer",
"type": "timerTrigger",
"direction": "in",
"runOnStartup": false
}
],
"disabled": false,
"scriptFile": "__init__.py"
}

Thanks for confirming #vll1990,
Posting the solution as an answer This will be beneficial for other members for the similar issue so that they can find and fix their issue.
We have tried to create a python azure function using timer trigger and figured out as you that we need to have our function.json file in below format.
The function.json that you are using is:
{
"schedule": "0 30 14 * * *",
"name": "myTimer",
"type": "timerTrigger",
"direction": "in",
"runOnStartup": false
}
Instead of that We need to specify the bindings before adding the value in our .json file .
For example:-
{
"bindings": [
{
"schedule": "0 30 14 * * *",
"name": "myTimer",
"type": "timerTrigger",
"direction": "in",
"runOnStartup": false //
}
],
"disabled": false,
"scriptFile": "__init__.py"
}
And then after deploy we will be able to see the timer function in our function app on Portal itself.
For more information please refer this MICROSOFT DOCUMENT| Timer trigger for Azure Functions.

Triggering Azure Function based on ServiceBus and writing back not working (Python)

I have a Python Azure function that triggers based on messages to a topic, which works fine independently. However, if I then try to also write a message to a different ServiceBus Queue it doesn't work (as in the Azure Function won't even trigger if new messages are published to the topic). Feels like the trigger conditions aren't met when I include the msg_out: func.Out[str] component. Any help would be much appreciated!
__init.py
import logging
import azure.functions as func
def main(msg: func.ServiceBusMessage, msg_out: func.Out[str]):
# Log the Service Bus Message as plaintext
# logging.info("Python ServiceBus topic trigger processed message.")
logging.info("Changes are coming through!")
msg_out.set("Send an email")
function.json
{
"scriptFile": "__init__.py",
"entryPoint": "main",
"bindings": [
{
"name": "msg",
"type": "serviceBusTrigger",
"direction": "in",
"topicName": "publish-email",
"subscriptionName": "validation-sub",
"connection": "Test_SERVICEBUS"
},
{
"type": "serviceBus",
"direction": "out",
"connection": "Test_SERVICEBUS",
"name": "msg_out",
"queueName": "email-test"
}
]
}
host.json
{
"version": "2.0",
"logging": {
"applicationInsights": {
"samplingSettings": {
"isEnabled": true,
"excludedTypes": "Request"
}
}
},
"extensionBundle": {
"id": "Microsoft.Azure.Functions.ExtensionBundle",
"version": "[2.*, 3.0.0)"
},
"extensions": {
"serviceBus": {
"prefetchCount": 100,
"messageHandlerOptions": {
"autoComplete": true,
"maxConcurrentCalls": 32,
"maxAutoRenewDuration": "00:05:00"
},
"sessionHandlerOptions": {
"autoComplete": false,
"messageWaitTimeout": "00:00:30",
"maxAutoRenewDuration": "00:55:00",
"maxConcurrentSessions": 16
}
}
}
}

I can reproduce your problem, it seems to be caused by the following error:
Property sessionHandlerOptions is not allowed.
Deleting sessionHandlerOptions can be triggered normally.

Azure function (python) write output to dynamic naming of the output blob path

I am using an Azure function as Webhook Consumer to receive http events as JSON and storing it on Azure Storage.
I want to do Dynamic naming of the output blob path based on date as shown below. I tried lots of options, but not able to get the desired output.
I am followed this post but no luck.
Excepted write path:
source/
ctry/
yyyy/
mm/
date/
hrs/
event_{systemtime}.json
function.json:
{
"scriptFile": "__init__.py",
"bindings": [
{
"authLevel": "anonymous",
"type": "httpTrigger",
"direction": "in",
"name": "req",
"methods": [
"get",
"post"
]
},
{
"type": "http",
"direction": "out",
"name": "$return"
},
{
"type": "blob",
"name": "outputblob",
"path": "source/ctry/{datetime:yyyy}/{datetime:MM}/{datetime:dd}/{datetime:hh}/event_{systemtime}.json",
"direction": "out",
"connection": "MyStorageConnectionAppSetting"
}
]
}
init.py
import logging
import azure.functions as func
def main(req: func.HttpRequest,outputblob: func.Out[str]) -> func.HttpResponse:
logging.info('Python HTTP trigger function processed a request.')
name = 'some_name'
if not name:
try:
req_body = 'req_body_test'#req.get_json()
except ValueError:
pass
else:
name = 'name'#req_body.get('name')
print(str(req.get_json()))
outputblob.set(str(req.get_json()))

Dynamic blob name needs you to post a request in json format.
For example, if want to output blob to test/{testdirectory}/test.txt, then, you need to post a request like:
{
"testdirectory":"nameofdirectory"
}
After that, the binding of azure function will be able to get the directory name.
By the way, I don't recommend binding for complex blob operations. I recommend using SDK more than binding.

I am able to achieve the dynamic path by making below changes to
function.json
{
"scriptFile": "__init__.py",
"bindings": [
{
"authLevel": "anonymous",
"type": "httpTrigger",
"direction": "in",
"name": "req",
"methods": [
"get",
"post"
]
},
{
"type": "http",
"direction": "out",
"name": "$return"
},
{
"type": "blob",
"name": "outputblob",
"path": "source/ctry/{DateTime:yyyy}/{DateTime:MM}/{DateTime:dd}/event_{DateTime}.json",
"direction": "out",
"connection": "MyStorageConnectionAppSetting"
}
]
}

Azure Timer Functions - Python: TimeSpan used in CRON settings is not accepting in the binding configuration

Tried the below Azure Python Function binding JSON configuration with "TimeSpan", "timeSpan" & "timespan" but getting error
Error: The function is in error: Can't figure out which ctor to call.
{
"scriptFile": "__init__.py",
"bindings": [
{
"name": "mytimer",
"type": "timerTrigger",
"direction": "in",
"timespan": "00:00:01",
"authLevel": "anonymous"
}
]
}
Refer to Documentation: https://learn.microsoft.com/en-us/azure/azure-functions/functions-bindings-timer?tabs=python#timespan

You can configure like this：
{
"scriptFile": "__init__.py",
"bindings": [
{
"name": "mytimer",
"type": "timerTrigger",
"direction": "in",
"schedule": "00:00:01"
}
]
}
I did a test and there seems to be no problem: