sending csv as a file

app/mailers/notifier.rb

@@ -16,12 +16,19 @@ class Notifier < ActionMailer::Base
     @receiver = recipient
     @string = string.html_safe
     
+    if attach = opts.delete(:attachments)
+      attach.each{ |f|
+        attachments[f[:name]] = f[:file]
+      }
+    end
+
     default_opts = {:to => @receiver.email,
          :from => AppConfig[:smtp_sender_address],
          :subject => I18n.t('notifier.single_admin.subject'),  :host => AppConfig[:pod_uri].host}
     default_opts.merge!(opts)
 
 
+
     mail(default_opts)
   end
 

lib/tasks/stats.rake

@@ -17,7 +17,7 @@ namespace :stats do
       end
     end
 
-    emails = Notifier.admin(string, admins, {:subject => "retention numbers #{Time.now.to_s}"})
+    emails = Notifier.admin( "here are some retention stats", admins, {:subject => "retention numbers #{Time.now.to_s}", :attachments => [:name => "retention_numbers_#{Time.now.to_s}.csv", :file => string]})
     emails.each {|e| e.deliver!} 
   end
 end

spec/mailers/notifier_spec.rb

@@ -45,6 +45,11 @@ describe Notifier do
       mail = Notifier.single_admin("Welcome to bureaucracy!", bob)
       mail.body.encoded.should match /change your notification settings/
     end
+
+    it 'has an optional attachment' do
+      mail = Notifier.single_admin("Welcome to bureaucracy!", bob, :attachments => [{:name => "retention stats", :file => "here is some file content"}])
+      mail.attachments.length.should == 1
+    end
   end
 
   describe ".started_sharing" do