我有一个简单的模型:
class Reply < ActiveRecord::Base
attr_accessible :body
belongs_to :post
end
在我的控制器中,我有一个简单的更新方法:
def update
@reply = Reply.find(params[:id])
if @reply.update_attributes!(params[:reply])
render :js => "alert('I am trying to update!')"
else
render :js => "alert('<%= @reply.errors %>')"
end
end
这并不会触发错误,但它也实际上没有更新回复。相反,我会收到“我正在尝试更新!”的消息,就好像一切都正常工作一样。但是当我重新加载页面并查看回复时,它仍然有相同的文本。它实际上并没有被更新。如果我将update_attributes替换为:
@reply.update_column(:body, params[:reply][:body])
它运行良好。如果我使用:
@reply.update_attribute(:body, params[:reply][:body])
它又一次不起作用了。你有什么想法吗?
在我的日志中,我有这个:
Started PUT "/posts/2/replies/20" for 127.0.0.1 at 2013-01-19 10:39:57 -0600
Processing by RepliesController#update as JS
Parameters: {"utf8"=>"✓", "authenticity_token"=>"Xot7E+ldXiBm0hVvw5XUP/U5guJU2g8e4QaLbDVGzDE=", "reply"=>{"body"=>"Updated text."}, "commit"=>"Submit Revision", "post_id"=>"2", "id"=>"20"
[1m[35mUser Load (1.0ms)[0m SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 LIMIT 1
[1m[36mReply Load (0.0ms)[0m [1mSELECT `replies`.* FROM `replies` WHERE `replies`.`id` = 20 LIMIT 1[0m
[1m[35m (1.0ms)[0m BEGIN
[1m[36mPost Load (0.0ms)[0m [1mSELECT `posts`.* FROM `posts` WHERE `posts`.`id` = 2 LIMIT 1[0m
[1m[35m (0.0ms)[0m COMMIT
Rendered replies/_reply_content.html.erb (502.0ms)
Rendered replies/update.js.erb (505.0ms)
Completed 200 OK in 849ms (Views: 484.0ms | ActiveRecord: 94.0ms)
update_attributes!
来查看为什么没有保存。 - alestanisupdate.js.erb
中使用 respond_to 格式块来包装代码呢? - Viren