下面这段代码在PC模拟器上可以获得数据，而在手机预览却获得空的数据（list是空的）： errMsg: "collection.aggregate:ok" list: [] 代码： db.collection('post') .aggregate() .skip(0) .limit(LIMIT) .sort({ updatedAt: -1 }) .project({ _id: 1, _openid: 1, comments: 1, content: 1, follows: 1, reads: 1, released: 1, subject: 1, updatedAt: $.dateToString({ date: '$updatedAt', format: '%m %d, %Y %H:%M:%S', //"month day, year hours:minutes:seconds" timezone: 'Asia/Shanghai' }), userInfo: 1 }) .end( ) .then(res => { console.log('res', res) }) .catch(err => { console.log('aggregated err', err) })