我正在尝试创建一个有很多通过关联,但我一定是弄错了。
我相信我得到了正确的关联代码,但是当我尝试创建连接记录时,这就是我得到的。
1.9.3p194:001> d = Day.find(1)Day Load(3.9ms)SELECT“days”。* FROM“days”WHERE“days”。“id”=? LIMIT 1 [[“id”,1]] => # 1.9.3p194:002> d.students.create!(:id => 1)(0.1ms)开始事务SQL(2.0ms)INSERT INTO“students”(“created_at”, “name”,“updated_at”)VALUES(?,?,?)[[“created_at”,星期四,4月18日 2013 12:49:25 UTC +00:00],[“name”,nil],[“updated_at”,星期四,4月18日 2013 12:49:25 UTC +00:00]](0.8ms)回滚事务 ActiveRecord :: UnknownAttributeError:未知属性:day_id
模型
# == Schema Information
#
# Table name: students
#
# id :integer not null, primary key
# name :string(255)
# created_at :datetime not null
# updated_at :datetime not null
#
class Student < ActiveRecord::Base
attr_accessible :name
has_many :days, :through => :days_students
has_many :days_students, :dependent => :destroy, :class_name => "DayStudent"
end
# == Schema Information
#
# Table name: days
#
# id :integer not null, primary key
# created_at :datetime not null
# updated_at :datetime not null
#
class Day < ActiveRecord::Base
#attr_accessible
has_many :students, :through => :days_students
has_many :days_students, :dependent => :destroy, :class_name => "DayStudent"
end
# == Schema Information
#
# Table name: day_students
#
# id :integer not null, primary key
# students_id :integer
# days_id :integer
# created_at :datetime not null
# updated_at :datetime not null
#
class DayStudent < ActiveRecord::Base
attr_accessible :student_id, :day_id
belongs_to :day
belongs_to :student
end
答案 0 :(得分:0)
day_students
表中的属性应为: