Question

我正在使用sas js http://sailsjs.org/#!documentation并且我想响应一个csv文件作为数据库查询的结果，如下所示：

module.exports = {
   csv: function (req, res) {

    Model.query("select * from somewhere ", function(err, list){
      if (err) console.log(err);
      // Send a CSV response
      return res.csv(list);
    });      
  },
  _config: {}

};

这是可能的吗？

我已经尝试过：

csv: function (req, res) {

    Model.query("select * from somewhere ", function(err, list){
      if (err) console.log(err);

      var objArray = list;
      var array = typeof objArray != 'object' ? JSON.parse(objArray) : objArray;

      var str = '';
      var line = '';

      var head = array[0];
      for (var index in array[0]) {
          var value = index + "";
          line += '"' + value.replace(/"/g, '""') + '",';
      }

      line = line.slice(0, -1);
      str += line + '\r\n';

      for (var i = 0; i < array.length; i++) {
          var line = '';

          for (var index in array[i]) {
              var value = array[i][index] + "";
              line += '"' + value.replace(/"/g, '""') + '",';
          }

          line = line.slice(0, -1);
          str += line + '\r\n';
      }
      res.setHeader('Content-disposition', 'attachment; filename=testing.csv');
      res.writeHead(200, { 'Content-Type': 'text/csv' });
      res.write(str);
      return res;
    });
  }

但包括“parse”，“_ typeCast”

Answer 1

var json2csv = require('json2csv');
var moment = require('moment');

module.exports = {
    csv: function (req, res) {

        MyModel.query("select id, name, email from MyModel", function(err, list){ 
            if (err) console.log(err);
            // Send a CSV response          
            var config = {
              fields : ['id','name', 'email'],
              data: list
            };

            json2csv(config, function(err, csv) {
              if (err) console.log(err);
              var filename = "report-" + moment().format("YYYY-MM-DD") + ".csv";
              res.attachment(filename);
              res.end(csv, 'UTF-8');
            });

        });   
    },
    _config: {}
}

Answer 2

这是我目前的解决方案，因为我无法删除我忽略的函数“_typeCast”和“parse”

csv：function（req，res）{

Model.query("select * from somewhere ", function(err, list){ 
  if (err) console.log(err);

  // Send a CSV response            
  var array = list;

  var str = '';
  var line = '';
  var separator = ',';

  var head = array[0];
  for (var index in array[0]) {
      if(index != "_typeCast" && index != "parse")
      line += escape(index) + separator;
  }

  line = line.slice(0, -1);
  str += line + '\r\n';

  for (var i = 0; i < array.length; i++) {

      var line = '';

      for (var index in array[i]) {
          if(index != "_typeCast" && index != "parse")
          line += escape(array[i][index]) + separator;
      }

      line = line.slice(0, -1);
      str += line + '\r\n';
  }

  function escape( field ) {
      if (field == undefined) {
        return '';
      }
      field = field + "";
      return '"' + field.replace(/\"/g, '""') + '"';
  }

  var filename = 'data.csv';
  res.attachment(filename);
  res.end(str, 'UTF-8');
});   }

Answer 3

如果使用Sails 1.0，则可以使用以下代码：

帆上的CSV响应js

3 个答案: