Question

我在Node.js版本v0.10.36中使用路径模块。它可以在我的笔记本电脑上运行Node.js版本v0.10.30。我基本上传递一个对象中包含的字符串，其中一个返回值来自Sequelize处理的从MySQL数据库获取的函数。如果我将path.join函数切换到常规路径+＆＃39; /＆＃39; +文件，它可以正常工作。但是，由于某些原因，path.join不断在程序中抛出错误。我添加了一些console.log来说明我的观点。错误来自以下几行：

console.log( this.recordingRow.get( 'id' ) );
console.log( config.path.audio );
var filepath = path.join( config.path.audio, this.recordingRow.get( 'id' ) );

但这是输出：

241
/home/sonar/sonar/files/audio

Unhandled rejection TypeError: Arguments to path.join must be strings
    at path.js:360:15                                                                                                                                                                                                                        
    at Array.filter (native)                                                                                                                                                                                                                 
    at Object.exports.join (path.js:358:36)                                                                                                                                                                                                  
    at Stream.startSonarData (/home/sonar/sonar/inc/streams/stream.js:148:22)                                                                                                                                                                
    at Object.<anonymous> (/home/sonar/sonar/inc/streams/stream.js:74:8)                                                                                                                                                                     
    at Object.tryCatcher (/home/sonar/sonar/node_modules/sequelize/node_modules/bluebird/js/main/util.js:24:31)                                                                                                                              
    at Promise._settlePromiseFromHandler (/home/sonar/sonar/node_modules/sequelize/node_modules/bluebird/js/main/promise.js:452:31)                                                                                                          
    at Promise._settlePromiseAt (/home/sonar/sonar/node_modules/sequelize/node_modules/bluebird/js/main/promise.js:530:18)                                                                                                                   
    at Promise._settlePromises (/home/sonar/sonar/node_modules/sequelize/node_modules/bluebird/js/main/promise.js:646:14)                                                                                                                    
    at Async._drainQueue (/home/sonar/sonar/node_modules/sequelize/node_modules/bluebird/js/main/async.js:177:16)                                                                                                                            
    at Async._drainQueues (/home/sonar/sonar/node_modules/sequelize/node_modules/bluebird/js/main/async.js:187:10)                                                                                                                           
    at Async.drainQueues (/home/sonar/sonar/node_modules/sequelize/node_modules/bluebird/js/main/async.js:15:14)                                                                                                                             
    at process._tickCallback (node.js:442:13)

Answer 1

嗯，错误非常明显。其中一个参数不是字符串。第一个似乎是一个数字。首先将其转换为字符串，例如通过<uses-sdk android:minSdkVersion="10" android:targetSdkVersion="19" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />：

String

Answer 2

如@Felix所述，你的第二个参数不是字符串而是数字。有两种方法可以将数字强制转换为字符串： -

path.join（config.path.audio，~~（this.recordingRow.get（＆＃39; id＆＃39;）））;
path.join（config.path.audio，String（this.recordingRow.get（＆＃39; id＆＃39;）））;

Node.js path.join的参数必须是字符串，但参数是路径

2 个答案: