在Ruby API,为has_many关联的例子是红宝石API的has_many语法#号
例子:一家企业类声明的has_many:客户,这将增加:
Firm#clients (similar to Clients.find :all, :conditions => ["firm_id = ?", id])
Firm#clients<<
Firm#clients.delete
Firm#clients=
Firm#client_ids
为什么arn't的方法firm.clients,firm.clients < <等。#号是什么意思?