我有两个类:Schedule
和Interaction
,它们看起来如下:
class Schedule < ActiveRecord::Base
has_many :interactions
end
class Interaction < ActiveRecord::Base
attr_accessible :schedule_id
has_one :schedule
end
迁移看起来像这样:
class CreateSchedules < ActiveRecord::Migration
def change
create_table :schedules do |t|
t.timestamps
end
end
end
class CreateInteractions < ActiveRecord::Migration
def change
create_table :interactions do |t|
t.integer :schedule_id
t.timestamps
end
end
end
当我这样做时:
irb(main):003:0> interaction_high_1 = Interaction.create()
irb(main):003:0> interaction_high_2 = Interaction.create()
irb(main):003:0> interaction_high_3 = Interaction.create()
irb(main):003:0> interaction_high_4 = Interaction.create()
irb(main):003:0> interaction_high_5 = Interaction.create()
irb(main):003:0> schedule1 = Schedule.create(:name => "high1").interactions << interaction_high_1, interaction_high_2, interaction_high_3, interaction_high_4, interaction_high_5
只有Interaction_high_1
获得指定的 schedule_id ,其余只有 nul
有人可以告诉我为什么会这样,以及如何解决它?
感谢您的回答!
答案 0 :(得分:2)
您正在创建交互,而不将它们与计划相关联。稍后添加它们将无法满足您的需求。这样做是这样的:
schedule1 = Schedule.create(:name => "high1")
1...5.times do
schedule1.interactions.create
end
另外,将交互模型中的:has_one
更改为:belongs_to
。