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I followed the Python Azure function tutorial.
And now I'm trying to add a Cosmos DB output binding following this example.
Why I try to run the function I get following error:
System.Private.CoreLib: Exception while executing function: Functions.HttpExample. Microsoft.Azure.DocumentDB.Core: Value cannot be null. (Parameter 'serviceEndpoint').
Am I missing a setting somewhere? In my app or on the Azure portal?
Is the serviceEndpoint the connectionString to Cosmos DB? Have you set that under app settings in Azure?
Basically what the error says is whatever this serviceEndpoint is, it is required and wasn't set. I am suspecting it's the connectionString. Can you try setting it to through AppSettings in Azure Portal (under Configuration)
I ran the Azure Functions: Download Remote Settings command in Visual Studio code to sync the settings.
connectionStringSetting in function.json is AzureWebJobsStorage for Cosmos DB
AzureWebJobsStorage in local.settings.json contains the actual connection string (with AccountName and AccountKey)
Nothing about serviceEndpoint
I am sorry for the delayed response. I am sorry, I am a bit confused. What do you mean by,
connectionStringSetting in function.json is AzureWebJobsStorage for Cosmos DB
AzureWebJobsStorage in local.settings.json contains the actual connection string (with AccountName and AccountKey)
Re: AzureWebJobsStorage: The Azure Functions runtime uses this storage account connection string for its normal operation.
It seems like you are missing the CosmosDb connection string when running in Azure. serviceEndpoint must be something which is internally used. Note: Settings in the local.settings.json file are used only when you're running projects locally.
Can you try to add this App Setting in Azure,
Key: AzureCosmosDBConnectionString // Assuming you are following the sample as it is
Value: <YourConnectionString>