Avoid Rails deprecation warning

DEPRECATION WARNING: Dangerous query method (method whose arguments are used as raw SQL) called with non-attribute argument(s): "LOWER(school_districts.name) ASC". Non-attribute arguments will be disallowed in Rails 6.0. This method should not be called with user-provided values, such as request parameters or model attributes. Known-safe values can be passed by wrapping them in Arel.sql(). (called from preprocess_order_args at /Users/shanecav/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/activerecord-5.2.0/lib/active_record/relation/query_methods.rb:1129)

Author: shanecav84

lib/rails-jquery-autocomplete/orm/active_record.rb

@@ -5,11 +5,13 @@ def active_record_get_autocomplete_order(method, options, model=nil)
         order = options[:order]
 
         table_prefix = model ? "#{model.table_name}." : ""
-        if sqlite?
+        sql = if sqlite?
           order || "LOWER(#{method}) ASC"
         else
           order || "LOWER(#{table_prefix}#{method}) ASC"
         end
+      
+        Arel.sql(sql)
       end
 
       def active_record_get_autocomplete_items(parameters)