javascript - Querying by a field with type 'reference' in Firestore

Question

I have a collection called 'categories' containing a single document with ID: 5gF5FqRPvdroRF8isOwd.

I have another collection called 'tickets'. Each ticket has a reference field which assigns the ticket to a particular category.

The field in the tickets collection is called 'category' and has a field type of reference.

In the code below, categoryDocId is the document ID of the category I want to query by.

const categoryDocID = `5gF5FqRPvdroRF8isOwd`;

const files = await firebase
  .firestore()
  .collection('tickets')
  .where('category', '==', categoryDocID)
  .get();

Why does files.length return 0?

For testing, I changed the category field type to string, and set it to the category ID instead of a direct reference. This correctly returned tickets assigned to the category, which leads me to believe it's something about how I'm querying a reference field.

Answer 1

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