onUpdate 云 function 不适用于 firestore 数据

Question

i have a firestore collection where i have a field like category with few values like category 1, category 2. I have a cloud function which is getting me the total count and duration of category 1 and category 2.

This function is working fine for create. But when i update it, count is getting updated but duration is not. This is my update function;

export const updateDuration = 
functions.firestore.document('Duration/{userId}/Duration/{uid}')
.onUpdate(async(change, context) => {
const oldData = change.before.data();

const newData = change.after.data();

const Duration = newData.WorkDuration;

if (newData.WorkDuration == oldData.WorkDuration) {
   return null } else {
    const Ref = newData.parent!
    Ref.set({
     Duration: Duration
    })
    
   }

   return null

  


})

Answer 1

The return null probably terminates function before the set() promise is resolved. Try this:

export const updateDuration = 
functions.firestore.document('Duration/{userId}/Duration/{uid}')
.onUpdate(async (change, context) => {
  const oldData = change.before.data();
  const newData = change.after.data();

  const Duration = newData.WorkDuration;

  if (newData.WorkDuration == oldData.WorkDuration) {
    return null 
  } else {
    const Ref = newData.parent!
    return Ref.set({ // add return here
      Duration: Duration
    }) 
  }
})