lib/kaminari/helpers/sinatra_helpers.rb in kaminari-0.15.1 vs lib/kaminari/helpers/sinatra_helpers.rb in kaminari-0.16.0

@@ -91,10 +91,40 @@
           options.reverse_merge(:current_page => scope.current_page, :total_pages => scope.total_pages, :per_page => scope.limit_value, :param_name => Kaminari.config.param_name, :remote => false)
         )
         paginator.to_s
       end
 
+      # A simple "Twitter like" pagination link that creates a link to the previous page.
+      # Works on Sinatra.
+      #
+      # ==== Examples
+      # Basic usage:
+      #
+      #   <%= link_to_previous_page @items, 'Previous Page' %>
+      #
+      # Ajax:
+      #
+      #   <%= link_to_previous_page @items, 'Previous Page', :remote => true %>
+      #
+      # By default, it renders nothing if there are no more results on the previous page.
+      # You can customize this output by passing a parameter <tt>:placeholder</tt>.
+      #
+      #   <%= link_to_previous_page @users, 'Previous Page', :placeholder => %{<span>At the Beginning</span>} %>
+      #
+      def link_to_previous_page(scope, name, options = {})
+        params = options.delete(:params) || (Rack::Utils.parse_query(env['QUERY_STRING']).symbolize_keys rescue {})
+        param_name = options.delete(:param_name) || Kaminari.config.param_name
+        placeholder = options.delete(:placeholder)
+
+        unless scope.first_page?
+          query = params.merge(param_name => scope.prev_page)
+          link_to name, env['PATH_INFO'] + (query.empty? ? '' : "?#{query.to_query}"), options.reverse_merge(:rel => 'previous')
+        else
+          placeholder.to_s.html_safe
+        end
+      end
+
       # A simple "Twitter like" pagination link that creates a link to the next page.
       # Works on Sinatra.
       #
       # ==== Examples
       # Basic usage:
@@ -112,14 +142,15 @@
       #
       def link_to_next_page(scope, name, options = {})
         params = options.delete(:params) || (Rack::Utils.parse_query(env['QUERY_STRING']).symbolize_keys rescue {})
         param_name = options.delete(:param_name) || Kaminari.config.param_name
         placeholder = options.delete(:placeholder)
-        query = params.merge(param_name => (scope.current_page + 1))
+
         unless scope.last_page?
+          query = params.merge(param_name => scope.next_page)
           link_to name, env['PATH_INFO'] + (query.empty? ? '' : "?#{query.to_query}"), options.reverse_merge(:rel => 'next')
         else
-          placeholder
+          placeholder.to_s.html_safe
         end
       end
     end
   end
 end