containerId null when using cosmosDB as an input bindung for a azure function

Question

Hi all,

I am trying to read some data from my cosmosDB-Database into an azure Function using an input binding. I followed this tutorial:

https://learn.microsoft.com/en-us/training/modules/chain-azure-functions-data-using-bindings/5-read-data-with-input-bindings-portal-lab?pivots=javascript

Now I am running into the following error message: Value cannot be null. (Parameter 'containerId')

Any help is greatly appreciated!

Answer 1

Nicolas Fromme Glad that you have resolved the issue and thanks for sharing it with the community which will greatly help others with similar issues. As per Microsoft Q&A community policy: "The question author cannot accept their own answer. They can only accept answers by others", I'll repost your solution in case you'd like to "Accept" the answer.

Resolution:

Nicolas Fromme Changed the key collectionName to containerName in function.json to resolve the issue.

Also, would like to share that the tutorial follows older extension 2+ which has references such as CollectionName, ConnectionStringSetting etc. however, in newer extension 4.x+, it has been changed to ContainerName, Connection etc. and here is the doc reference: Attributes.

We will pass feedback to doc author team to make the changes for the latest extension version. I hope this helps and let us know if any questions.