Firestore cloud functions - access variable in path

Question

So I have this architecture in my db : test1/{test1Id}/test2/{test2Id}

I want to interact with my DB in cloud functions whenever a new one is added :

exports.test = functions.firestore
  .document('test1/{test1Id}/test2/{test2Id}')
  .onCreate(async (testsnap, context) => {
    console.log(testsnap.id);
    console.log(test1Id);
  });

but test1Id is then undefined. How can I access it ?

Thanks ahead.

Answer 1

You must use

context.params.test1Id

All parameters are held under the context object