Question

创建具有匹配项的学生都是模型，我想在Match中存储来自Student的值。如何处理这个？

我尝试了委托，但是抛出匹配为空的错误，任何想法？谢谢！

用户模型：

class Student < ActiveRecord::Base

  attr_accessible :name, :level

  has_one :match
  before_create :setup_match

  def setup_match
    self.create_match # create the match that belongs to this student
  end


end

匹配模式：

class Match < ActiveRecord::Base

  belongs_to :student
  attr_accessible :initiated, :level

  before_save :default_values

  def default_values
    # HERE is the problem
    # Need to store student.name and student.level here, how?
    self.initiated = student.name
    self.level = student.level
  end


end

Answer 1

您应该在学生中移动匹配的设置值..这样的事情（未经测试）：

class Student < AR::Base
  has_one :match
  accepts_nested_attributes_for :match

  before_create :setup_match

  def setup_match
    build_match(:initiated => name, :level => level)
  end
end

rails：如何在创建时存储model1和model2的值？

1 个答案: