Promise.all不等待新的Promise解决

Question

This is part of a spa that uses nodejs and jquery. The getToday function console logs "result:" so the whole thing should console log 1, then result:, then 2 but it does not wait for getToday to complete. The output is 1, 2, result.

app.get('/incidents/all', function(req, res){
    let data = globals.dataTopdesk;
    let output = {}
    Promise.all([
        data.length,
        calculateProcessingStatus(data),
        calculateOnHold(data),
        calculateOpen(data),
        calculateStatus(data),
        calculateCallType(data);
    ])
    .then(function(values) {
        output.all = values[0]
        output.processingStatus = values[1],
        output.onHold = values[2],
        output.open = values[3],
        output.status = values[4],
        output.callType = values[5]
        return output;
    })
    .then(function(output) {
        console.log('1')
        return new Promise(resolve=> {
            output.today = getToday(db, output)
            resolve(output);
        })
    })
    .then(function(output) {
        console.log('2')
        res.send(output)
    })
    .catch (function(err) {
        res.send('failed: ' + err)
    })
})

Why is this not waiting for the new Promise to resolve?

Answer 1

If getToday is async and returns itself a promise, add it inside the chain without wrapping with an extra promise which looks useless:

  return getToday().then(data => { output.today = data; return output; });