创建后,设置角色

Question

我正在尝试使用after_create将默认用户角色设置为订阅者.但它似乎没有做出任何改变.新用户的角色始终为[""].

用户模型

class User < ActiveRecord::Base

  acts_as_authentic
  after_create :set_sub
  after_create :set_universal
  after_create :set_carrier

  def set_sub
    self.roles << "subscriber"
    #self.roles_mask = 4
  end

  def set_universal
      self.channels << Channel.find(1)
  end

  def set_carrier
    @carrier = Carrier.with_name(self.carrier_name)
    self.carrier<< @carrier
  end

  ROLES = %w[admin  moderator subscriber]

  #Each user can subscribe to many channels
  has_and_belongs_to_many :channels

  #Each user who is a moderator can moderate many channels
  #has_many :channel_mods
  has_and_belongs_to_many :modifies , :class_name => "Channel"

  #Each user can receive many messages
  has_and_belongs_to_many :messages

  #Each user belongs to a carrier
  belongs_to :carrier

  #Filter users by role(s)
  named_scope :with_role, lambda { |role| {:conditions => "roles_mask & #{2**ROLES.index(role.to_s)} > 0 "} }

  def roles  
    ROLES.reject { |r| ((roles_mask || 0) & 2**ROLES.index(r)).zero? }  
  end

  def roles=(roles)  
    self.roles_mask = (roles & ROLES).map { |r| 2**ROLES.index(r) }.sum  
  end

  def role_symbols
  roles.map do |role|
    role.underscore.to_sym  # NOT role.name.underscore.to_sym (role is a string)
    end
  end


end

Answer 1

在set_stub方法中,你self.roles << "subscriber"做的不多.它修改角色返回的数组,但没有别的.

您需要self.role =在保存之前调用并执行此操作,以便保存.

def set_sub
  self.roles = [ "subscriber" ]
end

其他after_creates工作的原因是因为它们处理一个关系,它具有<<定义的方法,并且<<关系会立即保存.

使用before_validation和/或before_save小心设置它可能更好,但不要保存它.您可以设置self.channel_ids = [ 1 ],它不会立即触发保存,但会在您呼叫save模型时保存.