rails中单独更新某一属性，不走model层的validate在做Rspec测试时，有一用例如下?? describe validate upda
rails中单独更新某一属性，不走model层的validate
在做Rspec测试时，有一用例如下
?
? describe "validate update the pool name" do
? ? ?it "rejects duplicated names" do
?
? ? ? ?pool1 = machine_pool
? ? ? ?MachinePool.create!(attrs)
? ? ? ?pool1.update_attributes(attrs).should == false
? ? ? ?#如果用pool1.update_attribute(:name,"交易中心机器池").should == false则报错,猜测：只更新某一属性时,不走model层的验证
? ? ?end
? end
?
此用例的目的是测试某一张表的某一字段在更新时的唯一性，通过这一测试用例，发现一个从来没有意识到的问题。
当使用XXX.update_attributes时，会走model的验证功能，然而使用XXX.update_attribute时，却不走验证功能。
不知到我这么理解，有没有问题。
1 楼 t284299773 2012-04-19 update_attribute(name, value)
Updates a single attribute and saves the record without going through the normal validation procedure. This is especially useful for boolean flags on existing records. The regular update_attribute method in Base is replaced with this when the validations module is mixed in, which it is by default.
update_attributes(attributes)
Updates all the attributes from the passed-in Hash and saves the record. If the object is invalid, the saving will fail and false will be returned.
确实如你所说 2 楼 zhangym124 2012-04-19 attribute(name, value)t284299773 写道update_attribute(name, value)
Updates a single attribute and saves the record without going through the normal validation procedure. This is especially useful for boolean flags on existing records. The regular update_attribute method in Base is replaced with this when the validations module is mixed in, which it is by default.
update_attributes(attributes)
Updates all the attributes from the passed-in Hash and saves the record. If the object is invalid, the saving will fail and false will be returned.
确实如你所说
谢谢你细心的答案。
