process_conditions

# File activerecord/lib/active_record/associations.rb, line 2287
              def process_conditions(conditions, table_name)
                sanitized = sanitize_sql(conditions, table_name)

                if sanitized =~ /\#\{.*\}/
                  ActiveSupport::Deprecation.warn(
                    'String-based interpolation of association conditions is deprecated. Please use a '                      'proc instead. So, for example, has_many :older_friends, :conditions => \age > #{age}\ '                      'should be changed to has_many :older_friends, :conditions => proc { "age > #{age}" }.'
                  )
                  instance_eval("%@#{sanitized.gsub('@', '\@')}@", __FILE__, __LINE__)
                elsif conditions.respond_to?(:to_proc)
                  conditions = sanitize_sql(instance_eval(&conditions), table_name)
                else
                  sanitized
                end
              end