[英]Uploading And Reading CSV-Parse File
I am trying to read a csv file with multiple same colums using Node CSV-Parser
我正在尝试使用Node CSV-Parser
读取具有多个相同列的csv文件
'from' ' 'to' 'from' ' 'to' 'from' ' 'to'
'Germ' ' 'NL' 'Turk' ' 'US' 'Nile' ' 'BR'
'Germ' ' 'NL' 'Turk' ' 'US' 'Nile' ' 'BR'
'Germ' ' 'NL' 'Turk' ' 'US' 'Nile' ' 'BR'
'Germ' ' 'NL' 'Turk' ' 'US' 'Nile' ' 'BR'
And below is my code: 以下是我的代码:
req.file('ratefile').upload(function (err, uploadedFile) {
if (err) return ResponseService.json(500, err, 'Uploaded Failed');
console.log(uploadedFile.length) //
if (uploadedFile.length) {
rs = fs.createReadStream(uploadedFile[0].fd);
parser = parse({columns: true, trim: true}, function (err, data){
var record = {};
console.log(data);
_.forEach(data, function(datum, index){
var routeName = datum['from'] +"-"+ datum['to'];
console.log(routeName);
record.name = datum['from'] +"-"+ datum['to'];
record.to = datum['to'];
record.from = datum['from'];
});
return ResponseService.json(200, res, 'file successfully uploaded');
});
rs.pipe(parser);
} else {
return ResponseService.json(500, res, 'Please upload a file')
}
});
And when I run that, it only the last column on the csv file. 当我运行它时,它只是csv文件的最后一列。
'from' ' 'to'
'Nile' ' 'BR'
'Nile' ' 'BR'
'Nile' ' 'BR'
Any help would be appreciated. 任何帮助,将不胜感激。 Thanks 谢谢
It will parse into something like 它会解析成类似的东西
{
"from": "Germ",
"to" : "NL",
"from": "Turk",
"to" : "US",
...
}
And of course it's not valid JSON, look at the duplicate keys. 当然它不是有效的JSON,看看重复的键。 So last key value pair will actually overriding previous pair. 因此,最后一个键值对实际上会覆盖前一对。
In your line 在你的行
parser = parse({columns: true, trim: true}, function (err, data){
Use function, or null
as columns
value, like 使用函数,或null
作为columns
值,如
parse({columns: null, trim: true}
And print out your parsed result, and then modify by your own needs. 并打印出解析后的结果,然后根据自己的需要进行修改。 It can also use function
, but I don't pretty sure function
can solve your problems, since it will still parsing your single csv line into single object
. 它也可以使用function
,但我不太确定function
可以解决你的问题,因为它仍然会将你的单个csv行解析为单个object
。
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