javascript - 无服务器( Node AWS) "TypeError","errorMessage":"callback is not a function"

Question

在我的handler.js

'use strict';
var lalamove = require('./lalamove/index.js');

module.exports.getEstimate = (event, context, callback) => {
  lalamove.getQuotation("hi");
};

我已经将字符串“hi”传递给 lalamove/index.js 上的 getQuotation()

'use strict';

module.exports = {
    getQuotation: function(event,context,callback){
        const response = {
            statusCode: 200,
            body: JSON.stringify({ message: event })
          }
        console.log('response', response);
        callback(null,response.body);
    }
}

它会记录在控制台日志中。它在控制台中有效，但无法返回。当我检查日志时:

ERROR Invoke Error {"errorType":"TypeError","errorMessage":"callback is not afunction","stack":["TypeError: callback is not a function"," at Object.getQuotation (/var/task/lalamove/index.js:10:9)"," at Runtime.module.exports.getEstimate[as handler] (/var/task/handler.js:14:12)"," at Runtime.handleOnce (/var/runtime/Runtime.js:63:25)"," at process._tickCallback (internal/process/next_tick.js:68:7)"]}

我尝试删除 context 但它仍然是相同的，我尝试使用 return 而不是 callback 但它不起作用，我仍然得到:

{"message": "Internal server error"}

而不是

{ statusCode: 200, body: '{"message":"hi"}' }

Answer 1

为了获得响应，您需要在调用者函数上实现回调函数，如下所示。

'use strict';
var lalamove = require('./lalamove/index.js');

module.exports.getEstimate = (event, context, callback) => {
  lalamove.getQuotation("hi", context, function(response) {
       console.log(response)//it will print return value
   });
};