云函数进行循环update数据,只进行一个集合update可以，如果同时进行另外一个集合update就不可以。为什么请看代码// 云函数入口文件

const cloud = require('wx-server-sdk')

cloud.init({

env: 'jlccba-0gjdzjbs62e3fd4b',

})

const db=cloud.database()

const _ = db.command

var timestamp = Date.parse(new Date());

var date = new Date(timestamp);

var thisyear=date.getFullYear();

// 云函数入口函数

exports.main = async (event, context) => {

try {

// 遍历修改数据库信息

for (let i = 0; i < event.data.length; i++) {

console.log(event.data)

db.collection('match').where({

_id: event.data[i]._id

}).update({

data: {

mth_results_primary: event.data[i].mth_results_primary,

mth_results_second: event.data[i].mth_results_second,

mth_finish_flag:'1',

},

})

if(event.data[i].mth_results_primary !=0 || event.data[i].mth_results_second!=0){

if (event.data[i].mth_results_primary>event.data[i].mth_results_second){

db.collection(thisyear.toString()).where({teamname:event.data[i].mth_name_primary}).update({

data:{

t_absolute_score:_.inc(event.data[i].mth_results_primary-event.data[i].mth_results_second),

t_victory:_.inc(1),

t_score:_.inc(2)

}

})

db.collection(thisyear.toString()).where({teamname:event.data[i].mth_name_second}).update({

data:{

t_absolute_score:_.inc(event.data[i].mth_results_second-event.data[i].mth_results_primary),

t_lost:_.inc(-1),

t_score:_.inc(1)

}

})

}else{

db.collection(thisyear.toString()).where({teamname:event.data[i].mth_name_second}).update({

data:{

t_absolute_score:_.inc(event.data[i].mth_results_second-event.data[i].mth_results_primary),

t_victory:_.inc(1),

t_score:_.inc(2)

}

})

db.collection(thisyear.toString()).where({teamname:event.data[i].mth_name_primary}).update({

data:{

t_absolute_score:_.inc(event.data[i].mth_name_primary-event.data[i].mth_name_second),

t_lost:_.inc(-1),

t_score:_.inc(1)

}

})

}

}

}

return {

success: true,

data: event.data

}

} catch (e) {

return {

success: false,

errMsg: e

}

}

}