diff --git a/app/repositories/orient_db/country_repository.rb b/app/repositories/orient_db/country_repository.rb
index 7b11e80f1a761287d3fd10ab698c415f408062ee..02e23a04d32a028734e78d4dc909939881780417 100644
--- a/app/repositories/orient_db/country_repository.rb
+++ b/app/repositories/orient_db/country_repository.rb
@@ -2,12 +2,12 @@ module OrientDb
   class CountryRepository < Base
 
     def find_all
-      return @connection.query "SELECT * FROM Country LIMIT 100 OFFSET 20"
+      return connection.query "SELECT * FROM Country LIMIT 100 OFFSET 20"
     end
 
     def find_by_id(rid)
-      res = @connection.query "SELECT title FROM Country WHERE @rid=##{rid}"
-      res[0]["has"] = @connection.query "SELECT expand(in) from (SELECT expand(out_has) FROM Country WHERE @rid=##{rid} LIMIT 30)"
+      res = connection.query "SELECT title FROM Country WHERE @rid=##{rid}"
+      res[0]["has"] = connection.query "SELECT expand(in) from (SELECT expand(out_has) FROM Country WHERE @rid=##{rid} LIMIT 30)"
       res[0]
     end
   end
diff --git a/app/repositories/orient_db/highlight_repository.rb b/app/repositories/orient_db/highlight_repository.rb
index b967c8ed1c9ff59eafc44115f41395028d3a860b..b33a4c6b78277b368b3434c4b5f3c6709c8a7a0f 100644
--- a/app/repositories/orient_db/highlight_repository.rb
+++ b/app/repositories/orient_db/highlight_repository.rb
@@ -6,13 +6,13 @@ module OrientDb
     end
 
     def find_all
-        return @connection.query "SELECT FROM Highlight"
-      rescue
-        return nil
+      return connection.query "SELECT FROM Highlight"
+    rescue
+      return nil
     end
 
-    def insert_data (name,url)
-        return @connection.command "INSERT INTO Highlight (name,URL) VALUES (#{name},#{url})"
+    def insert_data (name, url)
+      return connection.command "INSERT INTO Highlight (name,URL) VALUES (#{name},#{url})"
     end
   end
 end
diff --git a/app/repositories/orient_db/university_repository.rb b/app/repositories/orient_db/university_repository.rb
index a15ba1f769077461f08d90e35361e7954cd67e22..864ecf15e59f33c613b79e9137f990978a48260b 100644
--- a/app/repositories/orient_db/university_repository.rb
+++ b/app/repositories/orient_db/university_repository.rb
@@ -6,25 +6,25 @@ module OrientDb
     end
 
     def find_all
-        return @connection.query "SELECT FROM University LIMIT 100"
+      return connection.query "SELECT FROM University LIMIT 100"
     end
 
     def find_by_id(rid)
-        res = @connection.query "SELECT title FROM University WHERE @rid=##{rid}"
+      res = connection.query "SELECT title FROM University WHERE @rid=##{rid}"
 
-        localized = @connection.query "SELECT expand(out) from (SELECT expand(in_has) FROM University WHERE @rid=##{rid})"
+      localized = connection.query "SELECT expand(out) from (SELECT expand(in_has) FROM University WHERE @rid=##{rid})"
 
-        #aux = @connection.query "SELECT FROM University WHERE @rid=##{rid}"
-        comments = @connection.query "SELECT expand(in_commented) FROM University WHERE @rid=##{rid}"
+      #aux = connection.query "SELECT FROM University WHERE @rid=##{rid}"
+      comments = connection.query "SELECT expand(in_commented) FROM University WHERE @rid=##{rid}"
 
-        res[0]["comments"] = comments[0];
-        res[0]["localized_in"] = localized[0];
+      res[0]["comments"] = comments[0];
+      res[0]["localized_in"] = localized[0];
 
-        return res[0];
+      return res[0];
     end
 
     def has(rid)
-        @connection.query "SELECT expand(in) FROM (SELECT expand(out_has) FROM University WHERE @rid=#{rid})"
+      connection.query "SELECT expand(in) FROM (SELECT expand(out_has) FROM University WHERE @rid=#{rid})"
     end
   end
 end
diff --git a/app/repositories/orient_db/user_repository.rb b/app/repositories/orient_db/user_repository.rb
index f202f540067896f33fe53f608117503b536fcd10..14bdaab90d442cb383f01ffd70bfaabb4e9c0f50 100644
--- a/app/repositories/orient_db/user_repository.rb
+++ b/app/repositories/orient_db/user_repository.rb
@@ -6,15 +6,15 @@ module OrientDb
     end
 
     def find_by_id(rid)
-        return @connection.query "SELECT FROM User WHERE @rid=#{rid}"
+      return connection.query "SELECT FROM User WHERE @rid=#{rid}"
     end
 
     def author_of(rid)
-        return @connection.query "SELECT expand(in) FROM (SELECT expand(out_author_of) FROM User WHERE @rid=#{rid})"
+      return connection.query "SELECT expand(in) FROM (SELECT expand(out_author_of) FROM User WHERE @rid=#{rid})"
     end
 
     def has(rid)
-        return @connection.query "SELECT expand(in) FROM (SELECT expand(out_has) FROM User WHERE @rid=#{rid})"
+      return connection.query "SELECT expand(in) FROM (SELECT expand(out_has) FROM User WHERE @rid=#{rid})"
     end
   end
 end