huiting/cloudfunctions/getFollow/index.js

// 云函数入口文件
const cloud = require('wx-server-sdk')

cloud.init()
const db = cloud.database()

// 云函数入口函数
exports.main = async (event, context) => {
  const {
    OPENID
  } = cloud.getWXContext()

  const follow = await db.collection('follow')
    .where({
      user_id: OPENID,
      pub_id: event.pub_id
    })
    .count()

  return {
    total: follow.total,
    status: 'OK'
  }
}