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POExport CSV with Mongoid and FasterCSV
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  1. POExport CSV with Mongoid and FasterCSV
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    copied!<pre><code>Class UserController def export_users users = User.all stream_csv do |csv| csv &lt;&lt; ["Name","Email","Gender"] users.each do |i| csv &lt;&lt; [i.name,i.email,i.gender] end end end def stream_csv require 'fastercsv' filename = params[:action] + ".csv" #this is required if you want this to work with IE if request.env['HTTP_USER_AGENT'] =~ /msie/i headers['Pragma'] = 'public' headers["Content-type"] = "text/plain" headers['Cache-Control'] = 'no-cache, must-revalidate, post-check=0, pre-check=0' headers['Content-Disposition'] = "attachment; filename=\"#{filename}\"" headers['Expires'] = "0" else headers["Content-Type"] ||= 'text/csv' headers["Content-Disposition"] = "attachment; filename=\"#{filename}\"" controller.response.headers["Content-Transfer-Encoding"] = "binary" end render :text =&gt; Proc.new { |response, output| csv = FasterCSV.new(output, :row_sep =&gt; "\r\n") yield csv } end end </code></pre> <p>Err: "#Proc:0x9382539@/sites/app/controllers/export_controller.rb:56"</p> <p>Using Ruby 1.8 and Rails 3.0.9</p> <p>So I think the problem here is that I'm not using "Proc" right. Or it's not supposed to act like just another block...</p> <p>I thought about programming a new logic into the class so that reads better. But if somebody could explain to me why my code is wrong or at least point me in a new direction than I might be able to learn something new here. Thanks</p> <p><strong>Note: Found a better way:</strong></p> <pre><code>def export_inverts require 'fastercsv' inverts = Invert.all filename = params[:action] + ".csv" #this is required if you want this to work with IE if request.env['HTTP_USER_AGENT'] =~ /msie/i headers['Pragma'] = 'public' headers["Content-type"] = "text/plain" headers['Cache-Control'] = 'no-cache, must-revalidate, post-check=0, pre-check=0' headers['Content-Disposition'] = "attachment; filename=\"#{filename}\"" headers['Expires'] = "0" else headers["Content-Type"] ||= 'text/csv' headers["Content-Disposition"] = "attachment; filename=\"#{filename}\"" headers["Content-Transfer-Encoding"] = "binary" end csv_string = FasterCSV.generate do |csv| csv &lt;&lt; ["Genus","Species","Common Name","Pet Name","Gender"] inverts.each do |i| csv &lt;&lt; [i.scientific_name,i.scientific_name,i.common_name,i.pet_name,i.gender] end end render :text =&gt; csv_string end </code></pre>
 

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