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://video2.skills-academy.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!

Accepted Answer

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.

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

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