diff --git a/app/models/query.rb b/app/models/query.rb
index 8830cc5b6..135d0990a 100644
--- a/app/models/query.rb
+++ b/app/models/query.rb
@@ -640,7 +640,7 @@ class Query < ActiveRecord::Base
             sql = "#{db_table}.#{db_field} BETWEEN #{value.first.to_f - 1e-5} AND #{value.first.to_f + 1e-5}"
           end
         else
-          sql = "#{db_table}.#{db_field} IN (" + value.collect{|val| "'#{connection.quote_string(val)}'"}.join(",") + ")"
+          sql = "#{db_table}.#{db_field} IN (" + value.collect{|val| "'#{ActiveRecord::Base.connection.quote_string(val)}'"}.join(",") + ")"
         end
       else
         # IN an empty set
@@ -648,7 +648,7 @@ class Query < ActiveRecord::Base
       end
     when "!"
       if value.any?
-        sql = "(#{db_table}.#{db_field} IS NULL OR #{db_table}.#{db_field} NOT IN (" + value.collect{|val| "'#{connection.quote_string(val)}'"}.join(",") + "))"
+        sql = "(#{db_table}.#{db_field} IS NULL OR #{db_table}.#{db_field} NOT IN (" + value.collect{|val| "'#{ActiveRecord::Base.connection.quote_string(val)}'"}.join(",") + "))"
       else
         # NOT IN an empty set
         sql = "1=1"
@@ -690,9 +690,9 @@ class Query < ActiveRecord::Base
         end
       end
     when "o"
-      sql = "#{queried_table_name}.status_id IN (SELECT id FROM #{IssueStatus.table_name} WHERE is_closed=#{connection.quoted_false})" if field == "status_id"
+      sql = "#{queried_table_name}.status_id IN (SELECT id FROM #{IssueStatus.table_name} WHERE is_closed=#{ActiveRecord::Base.connection.quoted_false})" if field == "status_id"
     when "c"
-      sql = "#{queried_table_name}.status_id IN (SELECT id FROM #{IssueStatus.table_name} WHERE is_closed=#{connection.quoted_true})" if field == "status_id"
+      sql = "#{queried_table_name}.status_id IN (SELECT id FROM #{IssueStatus.table_name} WHERE is_closed=#{ActiveRecord::Base.connection.quoted_true})" if field == "status_id"
     when "><t-"
       # between today - n days and today
       sql = relative_date_clause(db_table, db_field, - value.first.to_i, 0)
@@ -754,9 +754,9 @@ class Query < ActiveRecord::Base
       date = Date.today
       sql = date_clause(db_table, db_field, date.beginning_of_year, date.end_of_year)
     when "~"
-      sql = "LOWER(#{db_table}.#{db_field}) LIKE '%#{connection.quote_string(value.first.to_s.downcase)}%'"
+      sql = "LOWER(#{db_table}.#{db_field}) LIKE '%#{ActiveRecord::Base.connection.quote_string(value.first.to_s.downcase)}%'"
     when "!~"
-      sql = "LOWER(#{db_table}.#{db_field}) NOT LIKE '%#{connection.quote_string(value.first.to_s.downcase)}%'"
+      sql = "LOWER(#{db_table}.#{db_field}) NOT LIKE '%#{ActiveRecord::Base.connection.quote_string(value.first.to_s.downcase)}%'"
     else
       raise "Unknown query operator #{operator}"
     end
@@ -819,7 +819,7 @@ class Query < ActiveRecord::Base
       if self.class.default_timezone == :utc
         from = from.utc
       end
-      s << ("#{table}.#{field} > '%s'" % [connection.quoted_date(from)])
+      s << ("#{table}.#{field} > '%s'" % [ActiveRecord::Base.connection.quoted_date(from)])
     end
     if to
       if to.is_a?(Date)
@@ -828,7 +828,7 @@ class Query < ActiveRecord::Base
       if self.class.default_timezone == :utc
         to = to.utc
       end
-      s << ("#{table}.#{field} <= '%s'" % [connection.quoted_date(to)])
+      s << ("#{table}.#{field} <= '%s'" % [ActiveRecord::Base.connection.quoted_date(to)])
     end
     s.join(' AND ')
   end