pg_array_hsotre_fix.rb

module PgArrayHstoreFix
  def self.included(base)
    base.class_eval do
      before_save :serialize_array_hash
    end

    def serialize_array_hash
      self.class.attribute_names.each do |attribute|
          column_definition = self.column_for_attribute(attribute)
          if column_definition.array && column_definition.type == :hstore
            serialized_hstore_array = []
            self.send(attribute.to_sym).each do |value|
              serialized_hstore_array << value.to_s.gsub(/{|}/,'')
            end
            self.send("#{attribute}=".to_sym, serialized_hstore_array)
          end
      end
    end

  end
end