Nodejs：路径必须是字符串
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Nodejs: path must be a string
提问by Ryan Yiada
I tried to implement some code that uses promise, and I copied some source code from Ghost. But when I ran it, I got an error:
我尝试实现一些使用 的代码promise，并从 Ghost 复制了一些源代码。但是当我运行它时，我得到了一个错误：
The code:
编码：
var Promise = require('bluebird')
var fs = require('fs')
var path = require('path')
var configPath = path.join(__dirname, '/config-example.js')
var configFile
function writeConfigFile(){
return new Promise(function(resolve,reject){
var read,
write,
error;
console.log('path->', configPath)
read = fs.createReadStream(configPath);
read.on('error', function(err){
console.log('Error->', err);
reject(err)
})
write = fs.createWriteStream(configFile)
write.on('error', function(err){
console.log('Error->',err)
reject(err)
})
write.on('finish', resolve)
read.pipe(write)
});
}
var p = writeConfigFile();
p.then(function(data){
console.log(data)
},function(data){
console.log('data->',data)
});
Error Output
错误输出
path-> /mnt/share/Learn/config-example.js
data-> [TypeError: path must be a string]
Error-> { [Error: ENOENT, open '/mnt/share/Learn/config-example.js']
errno: 34, code: 'ENOENT',
path: '/mnt/share/Learn/config-example.js' }
采纳答案by 3y3
Your problem is here:
你的问题在这里：
write = fs.createWriteStream(configFile)
configFile - is uninitialized variable here. You can avoid same problem in future by using some debugger.
configFile - 这里是未初始化的变量。您可以在将来使用一些调试器来避免同样的问题。
I recommend you node-inspector
我推荐你节点检查员
