Exportation as CSV.

It's based on the hard-coded use of faster_csv, so it
should certainly have to be changed a bit in order to
prepare for Ruby 1.9.

README

@@ -124,6 +124,8 @@ because the pagination mechanism has been removed from the Rails core base.
 
 	git://github.com/mislav/will_paginate.git
 
+You also need the faster_csv gem.
+
 
 How do I use it?
 

init.rb

@@ -15,6 +15,7 @@ def draw_with_admin
 
       map.connect "#{prefix}/:model/:action", :controller => 'auto_admin', :action => 'list', 
         :requirements => { :action => /[^0-9].*/, :id => nil }
+      map.connect "#{prefix}/:model.:format", :controller => 'auto_admin', :action => 'list'
       map.connect "#{prefix}/:model/:id/:action", :controller => 'auto_admin', :action => 'edit', 
         :requirements => { :id => /\d+/ }
       yield map

lib/auto_admin_controller.rb

@@ -1,4 +1,3 @@
-
 class AutoAdminController < AutoAdmin::AutoAdminConfiguration.controller_super_class
   include AutoAdminHelper
   self.view_paths = AutoAdmin::AutoAdminConfiguration.view_directory
@@ -113,10 +112,18 @@ def list
     if params[:search] && model.searchable?
       model.append_search_condition! params[:search], options
     end
-    options.update(:page => params[:page], :per_page => (params[:per_page] || model.paginate_every).to_i)
-    @objects = model.paginate(options)
-    session[:admin_list_params] ||= {}
-    session[:admin_list_params][params[:model]] = params
+    respond_to do |format|
+      format.html do
+        options.update(:page => params[:page], :per_page => (params[:per_page] || model.paginate_every).to_i)
+        @objects = model.paginate(options)
+        session[:admin_list_params] ||= {}
+        session[:admin_list_params][params[:model]] = params
+      end
+      format.csv do
+        @objects = model.find(:all, options)
+        export_into_csv_excel(model, @objects)
+      end
+    end
   end
 
   def save

lib/auto_admin_helper.rb

@@ -1,3 +1,5 @@
+require 'faster_csv'
+
 module AutoAdminHelper
   def model name=nil
     AutoAdmin::AutoAdminConfiguration.model( name || params[:model] )
@@ -115,5 +117,24 @@ def admin_table(options={}, &proc)
     }.update(options)
     fields_for(nil, nil, opts, &proc)
   end
-end
 
+  def tweak_csv_excel_content_type
+    if request.respond_to?(:user_agent)
+      request.user_agent =~ /windows/i ? 'application/vnd.ms-excel' : 'text/csv'
+    else
+      'text/csv'
+    end
+  end
+
+  def export_into_csv_excel(model, collection)
+    content_type = tweak_csv_excel_content_type
+    csv_content = FasterCSV.generate do |csv|
+      csv << model.columns.map {|col| col.human_name}
+      collection.each do |o|
+        csv << model.columns.map {|col| o.send(col.name.to_sym)}
+      end
+    end
+    send_data csv_content, :type => content_type,
+      :filename => "#{params[:model]}.csv"
+  end
+end

themes/django/views/list.html.erb

@@ -2,7 +2,8 @@
 @body_class = 'change-list'
 @content_class = 'flex'
 @title = "Select #{human_model.downcase} to change"
-@tools = [link_to( "Add #{human_model.downcase}", { :model => params[:model], :action => 'edit' }, { :class => 'addlink' } )]
+@tools = [link_to( "Add #{human_model.downcase}", { :model => params[:model], :action => 'edit' }, { :class => 'addlink' } ),
+  link_to( "Save as Excel/CSV", { :model => params[:model], :format => 'csv', :filter => params[:filter], :sort => params[:sort], :sort_reverse => params[:sort_reverse], :search => params[:search] } )]
 %>
 <div class="module filtered" id="changelist">