class ActiveRecord::SchemaDumper

def foreign_keys(table, stream)
  if (foreign_keys = @connection.foreign_keys(table)).any?
    add_foreign_key_statements = foreign_keys.map do |foreign_key|
      parts = [
        "add_foreign_key #{remove_prefix_and_suffix(foreign_key.from_table).inspect}",
        remove_prefix_and_suffix(foreign_key.to_table).inspect,
      ]
      if foreign_key.column != @connection.foreign_key_column_for(foreign_key.to_table, "id")
        parts << "column: #{foreign_key.column.inspect}"
      end
      if foreign_key.custom_primary_key?
        parts << "primary_key: #{foreign_key.primary_key.inspect}"
      end
      if foreign_key.export_name_on_schema_dump?
        parts << "name: #{foreign_key.name.inspect}"
      end
      parts << "on_update: #{foreign_key.on_update.inspect}" if foreign_key.on_update
      parts << "on_delete: #{foreign_key.on_delete.inspect}" if foreign_key.on_delete
      parts << "deferrable: #{foreign_key.deferrable.inspect}" if foreign_key.deferrable
      parts << "validate: #{foreign_key.validate?.inspect}" unless foreign_key.validate?
      "  #{parts.join(', ')}"
    end
    stream.puts add_foreign_key_statements.sort.join("\n")
  end
end