Javascript s、 替换不是sequelize.fn'；平均值'；

以下查询有效，但代码无效：

/*
SELECT "UserRole", Avg(rating)  FROM "Reviews" AS "Review" GROUP BY "UserRole";
 UserRole |        avg         
----------+--------------------
 COACH | 2.0000000000000000
 PLAYER | 3.0000000000000000
(2 rows)

*/
router.get("/as",function(request,response){
  model.Review.find({
      where: { UserId: 1},
      attributes: [ "UserRole", [ sequelize.fn('AVG', sequelize.col('rating')) ]],  
      group: ["UserRole"],


    }).then(function(ratings){

    })

})

以下是我得到的错误：

Unhandled rejection TypeError: s.replace is not a function
    at Object.module.exports.removeTicks (/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/utils.js:376:14)
    at Object.module.exports.addTicks (/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/utils.js:372:29)
    at Object.QueryGenerator.quoteIdentifier (/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/dialects/postgres/query-generator.js:844:20)
    at Object.QueryGenerator.quoteIdentifiers (/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/dialects/abstract/query-generator.js:937:19)
    at /media/mydata/projects/jobcuejs/node_modules/sequelize/lib/dialects/abstract/query-generator.js:1080:82
    at Array.map (native)
    at Object.QueryGenerator.selectQuery (/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/dialects/abstract/query-generator.js:1062:55)
    at QueryInterface.select (/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/query-interface.js:661:25)
    at null.<anonymous> (/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/model.js:1413:32)
    at tryCatcher (/media/mydata/projects/jobcuejs/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/media/mydata/projects/jobcuejs/node_modules/bluebird/js/release/promise.js:503:31)
    at Promise._settlePromise (/media/mydata/projects/jobcuejs/node_modules/bluebird/js/release/promise.js:560:18)
    at Promise._settlePromise0 (/media/mydata/projects/jobcuejs/node_modules/bluebird/js/release/promise.js:605:10)
    at Promise._settlePromises (/media/mydata/projects/jobcuejs/node_modules/bluebird/js/release/promise.js:684:18)
    at Async._drainQueue (/media/mydata/projects/jobcuejs/node_modules/bluebird/js/release/async.js:126:16)
    at Async._drainQueues (/media/mydata/projects/jobcuejs/node_modules/bluebird/js/release/async.js:136:10)

未处理的拒绝类型错误：s.replace不是函数
在Object.module.exports.removeTicks（/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/utils.js:376:14）
在Object.module.exports.addTicks（/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/utils.js:372:29）
位于Object.QueryGenerator.quoteIdentifier（/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/dialogs/postgres/query generator.js:844:20）
位于Object.QueryGenerator.quoteIdentifiers（/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/dialogs/abstract/query generator.js:937:19）
at/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/dialogs/abstract/query generator.js:1080:82
at Array.map（本机）
在Object.QueryGenerator.selectQuery（/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/dialogs/abstract/query generator.js:1062:55）
在QueryInterface.select（/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/query interface.js:661:25）
在空。（/media/mydata/projects/jobcuejs/node_modules/sequelize/lib/model.js:1413:32）
在tryCatcher（/media/mydata/projects/jobcuejs/node_modules/bluebird/js/release/util.js:16:23）
在Promise._settlePromiseFromHandler（/media/mydata/projects/jobcuejs/node_modules/bluebird/js/release/Promise.js:503:31）
在Promise._结算Promise（/media/mydata/projects/jobcuejs/node_modules/bluebird/js/release/Promise.js:560:18）
在Promise._settlePromise0（/media/mydata/projects/jobcuejs/node_modules/bluebird/js/release/Promise.js:605:10）
在Promise._结算Promises（/media/mydata/projects/jobcuejs/node_modules/bluebird/js/release/Promise.js:684:18）
异步绘制队列（/media/mydata/projects/jobcuejs/node\u modules/bluebird/js/release/Async.js:126:16）
异步绘制队列（/media/mydata/projects/jobcuejs/node\u modules/bluebird/js/release/Async.js:136:10）

---

我做错什么了？

你可以试试这样的

[ sequelize.fn('AVG', sequelize.col('rating')), "avg" ]

---

你可以试试这样的

[ sequelize.fn('AVG', sequelize.col('rating')), "avg" ]