diff --git a/app/models/book.rb b/app/models/book.rb
index 732e60b..cdad828 100644
--- a/app/models/book.rb
+++ b/app/models/book.rb
@@ -73,7 +73,7 @@ class Book
 
     fields_to_show.each do |t|
       if (self.fields[t].type.to_s == "String" rescue false)
-        fields_to_remove << t if (datas.where(t.to_sym.ne => nil).or(t.to_sym.ne => "").count == 0 rescue false)
+        fields_to_remove << t if (datas.where(t.to_sym.ne => nil).count == 0 && datas.where(t.to_sym.ne => nil).count == 0 rescue false)
       else
         fields_to_remove << t if (datas.where(t.to_sym.ne => nil).count == 0 rescue false)
       end