Simplify page_entries_info by adding entry_name interface to each ORM

lib/kaminari/helpers/action_view_extension.rb

@@ -86,17 +86,7 @@ module Kaminari
     #   <%= page_entries_info @posts, :entry_name => 'item' %>
     #   #-> Displaying items 6 - 10 of 26 in total
     def page_entries_info(collection, options = {})
-      entry_name = if options[:entry_name]
-        options[:entry_name]
-      elsif collection.is_a?(::Kaminari::PaginatableArray)
-        'entry'
-      else
-        if collection.respond_to? :model  # DataMapper
-          collection.model.model_name.human.downcase
-        else  # AR
-          collection.model_name.human.downcase
-        end
-      end
+      entry_name = options[:entry_name] || collection.entry_name
       entry_name = entry_name.pluralize unless collection.total_count == 1
 
       if collection.total_pages < 2

lib/kaminari/models/active_record_relation_methods.rb

@@ -8,6 +8,10 @@ module Kaminari
       end
     end
 
+    def entry_name
+      model_name.human.downcase
+    end
+
     def total_count(column_name = :all, options = {}) #:nodoc:
       # #count overrides the #select which could include generated columns referenced in #order, so skip #order here, where it's irrelevant to the result anyway
       @total_count ||= begin

lib/kaminari/models/array_extension.rb

@@ -24,6 +24,10 @@ module Kaminari
       end
     end
 
+    def entry_name
+      "entry"
+    end
+
     # items at the specified "page"
     class_eval <<-RUBY, __FILE__, __LINE__ + 1
       def #{Kaminari.config.page_method_name}(num = 1)

lib/kaminari/models/data_mapper_collection_methods.rb

@@ -1,5 +1,9 @@
 module Kaminari
   module DataMapperCollectionMethods
+    def entry_name
+      model.model_name.human.downcase
+    end
+
     def limit_value #:nodoc:
       query.options[:limit] || 0
     end

lib/kaminari/models/mongoid_criteria_methods.rb

@@ -1,5 +1,9 @@
 module Kaminari
   module MongoidCriteriaMethods
+    def entry_name
+      model_name.human.downcase
+    end
+
     def limit_value #:nodoc:
       options[:limit]
     end

lib/kaminari/models/plucky_criteria_methods.rb

@@ -4,6 +4,10 @@ module Kaminari
 
     delegate :default_per_page, :max_per_page, :max_pages, :to => :model
 
+    def entry_name
+      model.model_name.human.downcase
+    end
+
     def limit_value #:nodoc:
       options[:limit]
     end