Paginate preserves multi-value parameters

lib/ramaze/helper/paginate.rb

@@ -226,6 +226,11 @@ def link(g, n, text = n, hash = {})
 
           action = Current.action
           params = request.params.merge(@var.to_s => n)
+          params.keys.each do |p|
+            if params[p].is_a?(Array) and not p.end_with?('[]')
+              params["#{p}[]"] = params.delete(p)
+            end
+          end
           hash[:href] = action.node.r(action.path, params)
 
           g.a(hash){ text }

spec/ramaze/helper/paginate.rb

@@ -32,6 +32,13 @@ def iteration
     pager.each{|item| out << item }
     out.inspect
   end
+
+  def preserve_params
+    request.params['single'] = 'zero'
+    request.params['multiple'] = %w[ one two three ]
+    pager = paginate(ALPHA)
+    pager.navigation
+  end
 end
 
 describe Ramaze::Helper::Paginate do
@@ -275,5 +282,23 @@ def iteration
 
     end
 
+    it 'preserves single value params' do
+      doc = Nokogiri::HTML(get("/array/preserve_params").body)
+      params = doc.search("//a").first[:href].split('?').last.split('&')
+      params.should.include 'single=zero'
+      params.should.not.include 'single[]'.escape(:cgi) + '=zero'
+    end
+
+    it 'preserves multi value params' do
+      doc = Nokogiri::HTML(get("/array/preserve_params").body)
+      params = doc.search("//a").first[:href].split('?').last.split('&')
+      params.should.not.include 'multiple=one'
+      params.should.not.include 'multiple=two'
+      params.should.not.include 'multiple=three'
+      params.should.include 'multiple[]'.escape(:cgi) + '=one'
+      params.should.include 'multiple[]'.escape(:cgi) + '=two'
+      params.should.include 'multiple[]'.escape(:cgi) + '=three'
+    end
+
   end
 end