Cosmos Db Trigger is not being run when inserting new document

fascynacja :

I am using Azure Cosmos DB. I have created a simple trigger in Azure Portal as follows:

  var context = getContext();
  var request = context.getRequest();

  // item to be created in the current operation
  var itemToCreate = request.getBody();
  itemToCreate["address"] = "test";

  // update the item that will be created
  request.setBody(itemToCreate);

Unfortunately this trigger is not being triggered when I insert new documents. I have also tried to set the "Trigger Type" to "Post". Am I missing anything?

Gaurav Mantri :

Great question! I always thought that triggers would run automatically :).

I believe the triggers are not run automatically whenever a document is inserted. What you would need to do is specify the trigger that you want to run when you're creating the document.

What you need to do is register the trigger by passing the trigger name as the request option when sending create document request.

For example, see the code here: https://docs.microsoft.com/en-us/azure/cosmos-db/how-to-use-stored-procedures-triggers-udfs#pre-triggers (copied below as well). Notice the use of PreTriggerInclude in RequestOptions:

dynamic newItem = new
{
    category = "Personal",
    name = "Groceries",
    description = "Pick up strawberries",
    isComplete = false
};

Uri containerUri = UriFactory.CreateDocumentCollectionUri("myDatabase", "myContainer");
RequestOptions requestOptions = new RequestOptions { PreTriggerInclude = new List<string> { "trgPreValidateToDoItemTimestamp" } };
await client.CreateDocumentAsync(containerUri, newItem, requestOptions);