我正在使用 before_save 调用来更新属于特定主控的所有记录。两者都有一个名为 item_id 的字段:
class Master < ActiveRecord::Base
has_many :records
before_save :update_records
def update_records
self.records.find_each do |r|
r.item_id = self.item_id
r.save
end
end
end
class Record < ActiveRecord::Base
end
这按预期工作(暂时搁置这样做是否是个好主意)。但是我无法获得通过的 RSpec 测试。这是我尝试过的:
describe Master do
describe 'before_save' do
it 'updates records belonging to it' do
master = FactoryGirl.create(:master, item_id: 1)
record = FactoryGirl.create(:record, master_id: master.id, item_id: 1)
master.item_id = 2
master.save
record.item_id.should == 2
end
end
end
原因很有趣。该模型在 Record 模型的第二个实例上工作,该实例已成功保存,但未返回到规范中:
"MASTER - CREATED IN SPEC"
#<Master:0x007fd0ed55ec20> {
:id => 26,
:item_id => 1,
}
"RECORD - CREATED IN SPEC"
#<Record:0x007fd0ea157e40> {
:id => 16,
:item_id => 1,
:master_id => 26,
}
"RECORD - AFTER SAVE IN MODEL"
#<Record:0x007fd0ed2f9a70> {
:id => 16,
:item_id => 2,
:master_id => 26,
}
"MASTER - UPDATED IN SPEC"
#<Master:0x007fd0ed55ec20> {
:id => 26,
:item_id => 2,
}
"RECORD - FINAL IN SPEC"
#<Record:0x007fd0ea157e40> {
:id => 16,
:item_id => 1,
:master_id => 26,
}
你知道吗:
- 为什么会这样?
- 我怎样才能让这个规范通过?