diff --git a/app/models/book.rb b/app/models/book.rb
index 03b559c..a67e0ba 100644
--- a/app/models/book.rb
+++ b/app/models/book.rb
@@ -40,7 +40,9 @@ class Book
   before_validation :add_http
 
   scope :sort_for_frontend, ->{ where(:is_hidden=>false).order_by(:year => "desc", :publish_date => "desc", :publication_date => "desc") }
-
+  def book_paper_type
+    self.book_type.title rescue ""
+  end
   def create_link
     title = []
     # title << self.member_profile.name if self.member_profile.present?
@@ -152,9 +154,9 @@ class Book
   def get_plugin_field_data(field)
     case field
     when "book_paper_type"
-      value = self.book_type.title rescue ""
+      value = (self.book_type.title rescue "")
     when "author_type"
-      value = self.book_author_types.collect{|type| type.title}.join(',') rescue ""
+      value = (self.book_author_types.collect{|type| type.title}.join(',') rescue "")
     when "author_name"
       value = []
       ([I18n.locale]+(Site.first.in_use_locales-[I18n.locale])).each do |locale|
@@ -180,7 +182,7 @@ class Book
     when "authors"
       value = get_authors_show(self)
     else
-      value = self.send(field) rescue ""
+      value = (self.send(field) rescue "")
     end
 
     value = (value =~ /\A#{URI::regexp(['http', 'https'])}\z/) ? "<a href='#{value}' target='blank'>#{value}</a>" : value