问云功能更新子-集合

EN

// Exporting the function
export const onProductChange = functions.firestore
.document('products/{productId}')
// Call the update method
.onUpdate(async (snap, context) => {
    // Get the product ID
    const productID = context.params.productID;
    // Query for all the collections with the specific product ID.
    const resultSnapshot = await db.collectionGroup('products')
        .where('id', '==', productID).get();

    // Filter for the collections with the 'products' root and return an array.
    const snaphotsInStoreSubcollection = resultSnapshot.docs.filter(
        (snapshot: any) => {
            return snapshot.ref.parent === 'products';
    });

    const batch = db.batch();
    // Takes each product and update
    snaphotsInStoreSubcollection.forEach((el: any) => {
        batch.set(el.ref, snaphotsInStoreSubcollection.product);
    });
    await batch.commit();
});