Ruby 1.9.2导出CSV字符串而不生成文件 [英] Ruby 1.9.2 export a CSV string without generating a file

问题描述

我只是无法得到'写作'下的'一个字符串'的例子文档中的示例。

I just can't get the 'To a String' example under 'Writing' example in the documentation to work at all.

ruby​​ -v返回：
ruby​​ 1.9.2p290 -09 revision 32553）[x86_64-darwin10.8.0]

ruby -v returns: ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin10.8.0]

我无法使用的文档示例如下：

The example from the documentation I can't working is here:

csv_string = CSV.generate do |csv|
    csv << ["row", "of", "CSV", "data"]
    csv << ["another", "row"]
end

我得到的错误是： / p>

The error I get is:

wrong number of arguments (0 for 1)

所以看起来我缺少一个参数，在文档这里它说明：

So it seems like I am missing an argument, in the documentation here it states:

This method wraps a String you provide, or an empty default String

但是当我传入一个空字符串，它给我以下错误：

But when I pass in a empty string, it gives me the following error:

No such file or directory - 

我不想生成一个csv文件，我只是想创建一个csv字符串，我作为文本发送给用户。

I am not looking to generate a csv file, I just wanted to create a string of csv that I send as text to the user.

推荐答案

这里的代码我知道对Ruby 1.9.2与Rails 3.0.1工作

Here is code I know works against Ruby 1.9.2 with Rails 3.0.1

def export_csv(filename, header, rows)
    require 'csv'

    file = CSV.generate do |csv|
        csv << header if not header.blank?
        rows.map {|row| csv << row}
    end

    send_data file, :type => 'text/csv; charset=iso-8859-1; header=present', :disposition => "attachment;filename=#{filename}.csv"
end

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