我需要在将记录保存到数据库之前执行方法名称,但似乎无法正常工作
class Guest < ActiveRecord::Base
before_save :name
has_and_belongs_to_many :checkins
validates_presence_of :FirstName
validates_presence_of :LastName
validates_format_of :FirstName, with: /^[A-Za-z\s]+$/
validates_format_of :LastName, with: /^[A-Za-z\s]+$/
def name
self.FirstName.titleize + " " + self.LastName.titleize
end
end
控制台
=> Guest(id: integer, FirstName: string, LastName: string, age: integer, sex: string, photo: string, address: text, mobile: integer, email: string, birthdate: date, created_at: datetime, updated_at: datetime)
1.9.3-p547 :008 > f=Guest.new
=> #<Guest id: nil, FirstName: nil, LastName: nil, age: nil, sex: nil, photo: nil, address: nil, mobile: nil, email: nil, birthdate: nil, created_at: nil, updated_at: nil>
1.9.3-p547 :009 > f.FirstName=" fernando "
=> " fernando "
1.9.3-p547 :010 > f.LastName=" suarez"
=> " suarez"
1.9.3-p547 :011 > f.save
=> true
1.9.3-p547 :012 > Guest.last
=> #<Guest id: 9, FirstName: " fernando ", LastName: " suarez", age: nil, sex: nil, photo: nil, address: nil, mobile: nil, email: nil, birthdate: nil, created_at: "2015-04-26 00:16:38", updated_at: "2015-04-26 00:16:38">
答案 0 :(得分:1)
您需要更改
self.FirstName.titleize + " " + self.LastName.titleize
到
self.FirstName = self.FirstName.titleize
self.LastName = self.LastName.titleize
说明:您实际上没有更改任何内容,而是连接值。
但是您可能希望使用name
方法进行名称表示。所以我建议一种新的验证方法。
看起来像这样:
def titlelize_names
self.FirstName = self.FirstName.titleize
self.LastName = self.LastName.titleize
end
当然,before_save必须调用:titlelize_names
。