是的，只需使用onCreate触发器创建三个不同的通配符函数

exports.BrandFunction = functions.firestore
  .document('brands/{brandId}')
  .onCreate(async (snap, context) => {
//Function doesnt need to be async unless you use await in the body
//YOUR CODE HERE 
});

exports.PackFunction = functions.firestore
  .document('packs/{packId}')
  .onCreate(async (snap, context) => {
//YOUR CODE HERE 
});

exports.ItemFunction = functions.firestore
  .document('items/{itemId}')
  .onCreate(async (snap, context) => {
//YOUR CODE HERE 
});

请注意，您可以使用任意多个通配符来替换显式集合或文档ID，例如:

exports.BrandFunction = functions.firestore
    .document('{collectionId}/{docId}')
    .onCreate(async (snap, context) => {
        console.log(context.params.collectionId);
        console.log(context.params.docId);

        return null;

    });

请参阅以下文档:https://firebase.google.com/docs/functions/firestore-events#wildcards-parameters