text: const cloud = require('wx-server-sdk')
  cloud.init()
  const db = cloud.database()
  const _ = db.command
  exports.main = async (event, context) => {
    const wxContext = cloud.getWXContext()
    return db.collection('content').where({
      _openid: wxContext.OPENID,
      garbage: _.eq(0),
      tag: _.eq(event.tag)
    }).orderBy('stamp', 'desc').limit(10).get()
  }