tweak will_paginate Rails helper so it can be used in custom context

lib/will_paginate/view_helpers/action_view.rb

@@ -72,14 +72,18 @@ def paginated_section(*args, &block)
     end
 
     def will_paginate_translate(keys, options = {})
-      if Array === keys
-        defaults = keys.dup
-        key = defaults.shift
+      if respond_to? :translate
+        if Array === keys
+          defaults = keys.dup
+          key = defaults.shift
+        else
+          defaults = nil
+          key = keys
+        end
+        translate(key, options.merge(:default => defaults, :scope => :will_paginate))
       else
-        defaults = nil
-        key = keys
+        super
       end
-      translate(key, options.merge(:default => defaults, :scope => :will_paginate))
     end
 
     protected
@@ -101,9 +105,8 @@ def default_url_params
 
       def url(page)
         @base_url_params ||= begin
-          url_params = base_url_params
+          url_params = merge_get_params(default_url_params)
           merge_optional_params(url_params)
-          url_params
         end
 
         url_params = @base_url_params.dup
@@ -112,15 +115,16 @@ def url(page)
         @template.url_for(url_params)
       end
 
-      def base_url_params
-        url_params = default_url_params
-        # page links should preserve GET parameters
-        symbolized_update(url_params, @template.params) if get_request?
+      def merge_get_params(url_params)
+        if @template.respond_to? :request and @template.request and @template.request.get?
+          symbolized_update(url_params, @template.params)
+        end
         url_params
       end
 
       def merge_optional_params(url_params)
         symbolized_update(url_params, @options[:params]) if @options[:params]
+        url_params
       end
 
       def add_current_page_param(url_params, page)
@@ -132,10 +136,6 @@ def add_current_page_param(url_params, page)
         end
       end
 
-      def get_request?
-        @template.request.get?
-      end
-
       private
 
       def parse_query_parameters(params)

spec/view_helpers/action_view_spec.rb

@@ -293,6 +293,45 @@ def renderer.gap() '<span class="my-gap">~~</span>' end
     end
   end
 
+  it "renders using ActionView helpers on a custom object" do
+    helper = Object.new
+    class << helper
+      attr_reader :controller
+      include ActionView::Helpers::UrlHelper
+      include Routes.url_helpers
+      include WillPaginate::ActionView
+    end
+    helper.default_url_options[:controller] = 'dummy'
+
+    collection = WillPaginate::Collection.new(2, 1, 3)
+    @render_output = helper.will_paginate(collection)
+
+    assert_select 'a[href]', 4 do |links|
+      urls = links.map {|l| l['href'] }.uniq
+      urls.should == ['/dummy/page/1', '/dummy/page/3']
+    end
+  end
+
+  it "renders using ActionDispatch helper on a custom object" do
+    helper = Object.new
+    class << helper
+      include ActionDispatch::Routing::UrlFor
+      include Routes.url_helpers
+      include WillPaginate::ActionView
+    end
+    helper.default_url_options[:host] = 'example.com'
+    helper.default_url_options[:controller] = 'dummy'
+    # helper.default_url_options[:only_path] = true
+
+    collection = WillPaginate::Collection.new(2, 1, 3)
+    @render_output = helper.will_paginate(collection)
+
+    assert_select 'a[href]', 4 do |links|
+      urls = links.map {|l| l['href'] }.uniq
+      urls.should == ['http://example.com/dummy/page/1', 'http://example.com/dummy/page/3']
+    end
+  end
+
   private
 
   def translation(data)