Ruby on Rails调试问题

Question

Hello guys I have this video tutorial on Ruby on Rails and I see that the guy has a bottom script debug, in the browser window. The problem is, I have only one part of that video tutorial (that part is free) and he says nothing about that debug. Maybe you guys can figure it out.

Here's a screenshot with it: http://i55.tinypic.com/3537drp.png

How can I achieve that? Thanks.

Answer 1

In the view, doing something like

<%= debug params %> 

will achieve what you have shown. Using the debug helper you can basically get a yaml dump of any variable that's available to the view, it will also "prettyfy" the dump by formatting it in a <pre> block and using a different background color. From the looks of what he has, he might have added that to the bottom of a layout (might be in app/views/layouts/application.html.erb). That will give you that dump in any of your pages.

Answer 2

The Rails Footnotes gem is very easy to configure and includes information like:

• variable assignments
• params action / controller
• route information
• SQL statements & execution times

Check it out:

https://github.com/josevalim/rails-footnotes

Answer 3

对于调试视图，您只需在视图页面中<％debugger％>，无论您想要查看数据流还是再次加载该视图，您都可以在控制台上运行每一行视图并查看数据流..并确保您在你的gem文件中有调试器gem。

Answer 4

看起来他只是将params.to_yaml渲染到页面上。

Answer 5

您应该考虑使用--debugger标志运行rails，如本指南中所示： http ： //guides.rubyonrails.org/debugging_rails_applications.html