diff --git a/app/models/issue_query.rb b/app/models/issue_query.rb
index 43bbd3263..e60ab9e78 100644
--- a/app/models/issue_query.rb
+++ b/app/models/issue_query.rb
@@ -429,7 +429,7 @@ class IssueQuery < Query
         " WHERE #{Member.table_name}.project_id = #{Issue.table_name}.project_id))"
     when "=", "!"
       role_cond = value.any? ?
-        "#{MemberRole.table_name}.role_id IN (" + value.collect{|val| "'#{connection.quote_string(val)}'"}.join(",") + ")" :
+        "#{MemberRole.table_name}.role_id IN (" + value.collect{|val| "'#{ActiveRecord::Base.connection.quote_string(val)}'"}.join(",") + ")" :
         "1=0"
 
       sw = operator == "!" ? 'NOT' : ''
@@ -441,7 +441,7 @@ class IssueQuery < Query
 
   def sql_for_is_private_field(field, operator, value)
     op = (operator == "=" ? 'IN' : 'NOT IN')
-    va = value.map {|v| v == '0' ? connection.quoted_false : connection.quoted_true}.uniq.join(',')
+    va = value.map {|v| v == '0' ? connection.quoted_false : ActiveRecord::Base.connection.quoted_true}.uniq.join(',')
 
     "#{Issue.table_name}.is_private #{op} (#{va})"
   end
@@ -460,14 +460,14 @@ class IssueQuery < Query
     sql = case operator
       when "*", "!*"
         op = (operator == "*" ? 'IN' : 'NOT IN')
-        "#{Issue.table_name}.id #{op} (SELECT DISTINCT #{IssueRelation.table_name}.#{join_column} FROM #{IssueRelation.table_name} WHERE #{IssueRelation.table_name}.relation_type = '#{connection.quote_string(relation_type)}')"
+        "#{Issue.table_name}.id #{op} (SELECT DISTINCT #{IssueRelation.table_name}.#{join_column} FROM #{IssueRelation.table_name} WHERE #{IssueRelation.table_name}.relation_type = '#{ActiveRecord::Base.connection.quote_string(relation_type)}')"
       when "=", "!"
         op = (operator == "=" ? 'IN' : 'NOT IN')
-        "#{Issue.table_name}.id #{op} (SELECT DISTINCT #{IssueRelation.table_name}.#{join_column} FROM #{IssueRelation.table_name} WHERE #{IssueRelation.table_name}.relation_type = '#{connection.quote_string(relation_type)}' AND #{IssueRelation.table_name}.#{target_join_column} = #{value.first.to_i})"
+        "#{Issue.table_name}.id #{op} (SELECT DISTINCT #{IssueRelation.table_name}.#{join_column} FROM #{IssueRelation.table_name} WHERE #{IssueRelation.table_name}.relation_type = '#{ActiveRecord::Base.connection.quote_string(relation_type)}' AND #{IssueRelation.table_name}.#{target_join_column} = #{value.first.to_i})"
       when "=p", "=!p", "!p"
         op = (operator == "!p" ? 'NOT IN' : 'IN')
         comp = (operator == "=!p" ? '<>' : '=')
-        "#{Issue.table_name}.id #{op} (SELECT DISTINCT #{IssueRelation.table_name}.#{join_column} FROM #{IssueRelation.table_name}, #{Issue.table_name} relissues WHERE #{IssueRelation.table_name}.relation_type = '#{connection.quote_string(relation_type)}' AND #{IssueRelation.table_name}.#{target_join_column} = relissues.id AND relissues.project_id #{comp} #{value.first.to_i})"
+        "#{Issue.table_name}.id #{op} (SELECT DISTINCT #{IssueRelation.table_name}.#{join_column} FROM #{IssueRelation.table_name}, #{Issue.table_name} relissues WHERE #{IssueRelation.table_name}.relation_type = '#{ActiveRecord::Base.connection.quote_string(relation_type)}' AND #{IssueRelation.table_name}.#{target_join_column} = relissues.id AND relissues.project_id #{comp} #{value.first.to_i})"
       end
 
     if relation_options[:sym] == field && !options[:reverse]