Question

代码：

console.log("NOW()")
console.log(new Date())
connection.query(fetchActiveRequests, values, function(err, result_requests) {
  console.log("==================== getActiveRequestsIfAny") 
  console.log(result_requests)
  var result_requests_length = result_requests.length;
  for (var i = 0; i < result_requests_length; i++) { 
    result_requests[i].current_time = result_requests[i].request_made_on
      .toISOString()
      .replace(/T/, ' ')
      .replace(/\..+/, '');
    result_requests[i].time_left = 60;
  }

错误：

undefined
/var/www/html/taxinew/ilmp-server/app-server/node_modules/mysql/lib/protocol/Parser.js:80
        throw err; // Rethrow non-MySQL errors
        ^

TypeError: Cannot read property 'length' of undefined
    at Query._callback (/var/www/html/taxinew/ilmp-server/app-server/routes/ride_parallel_dispatcher.js:3555:58)
    at Query.Sequence.end (/var/www/html/taxinew/ilmp-server/app-server/node_modules/mysql/lib/protocol/sequences/Sequence.js:88:24)
    at Query.ErrorPacket (/var/www/html/taxinew/ilmp-server/app-server/node_modules/mysql/lib/protocol/sequences/Query.js:90:8)
    at Protocol._parsePacket (/var/www/html/taxinew/ilmp-server/app-server/node_modules/mysql/lib/protocol/Protocol.js:279:23)
    at Parser.write (/var/www/html/taxinew/ilmp-server/app-server/node_modules/mysql/lib/protocol/Parser.js:76:12)
    at Protocol.write (/var/www/html/taxinew/ilmp-server/app-server/node_modules/mysql/lib/protocol/Protocol.js:39:16)
    at Socket.<anonymous> (/var/www/html/taxinew/ilmp-server/app-server/node_modules/mysql/lib/Connection.js:103:28)
    at emitOne (events.js:116:13)
    at Socket.emit (events.js:211:7)
    at addChunk (_stream_readable.js:263:12)

Answer 1

result_requests是undefined。可能你得到一个错误，并且您没有处理代码中的错误。

无法读取未定义节点js的属性“长度”

1 个答案: