Total count and configurable default per_page (#31)

* Remove hard coded maximum per-page limit of 30.

* Don't include total in pagination links.

* Wrap default per_page in a method.

* Update readme with jsonapi_page_size example.

* Skip :records in pagination with next.

Author: jkorz

README.md

@@ -290,6 +290,7 @@ class MyController < ActionController::Base
       render jsonapi: paginated
     end
   end
+
 end
 ```
 
@@ -306,6 +307,15 @@ use the `jsonapi_pagination_meta` method:
   end
 
 ```
+
+If you want to change the default number of items per page, use the
+`jsonapi_page_size` method:
+
+```ruby
+  def jsonapi_page_size
+    30
+  end
+```
 ### Deserialization
 
 `JSONAPI::Deserialization` provides a helper to transform a `JSONAPI` document

lib/jsonapi/pagination.rb

@@ -43,6 +43,8 @@ def jsonapi_pagination(resources)
       original_url = request.base_url + request.path + '?'
 
       pagination.each do |page_name, number|
+        next if page_name == :records
+
         original_params[:page][:number] = number
         links[page_name] = original_url + CGI.unescape(
           original_params.to_query
@@ -93,16 +95,21 @@ def jsonapi_pagination_meta(resources)
     #
     # @return [Array] with the offset, limit and the current page number
     def jsonapi_pagination_params
-      def_per_page = self.class.const_get(:JSONAPI_PAGE_SIZE).to_i
-
       pagination = params[:page].try(:slice, :number, :size) || {}
       per_page = pagination[:size].to_f.to_i
-      per_page = def_per_page if per_page > def_per_page || per_page < 1
+      per_page = jsonapi_page_size if per_page < 1
       num = [1, pagination[:number].to_f.to_i].max
 
       [(num - 1) * per_page, per_page, num]
     end
 
+    # Retrieves the default page size
+    #
+    # @return [Integer]
+    def jsonapi_page_size
+      self.class.const_get(:JSONAPI_PAGE_SIZE).to_i
+    end
+
     # Fallback to Rack's parsed query string when Rails is not available
     #
     # @return [Hash]