Ruby-on-rails 如何通过link_to helper从rails视图中将参数传递给控制器操作
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How to pass a parameter to controller action from view in rails through link_to helper
提问by Billy Chan
<%= link_to "Connect", {controller:"home", action:"connectTo"}, id: "btny" %>
This is my link_tohelper in view.
这是我link_to眼中的帮手。
I want to attach a parameter in this link_totag so that I can get it in the action connectTo. I'm unable to find correct syntax or way to do it, and unable to understand some answers I found on stackoverflow.
How can I achieve this?
我想在这个link_to标签中附加一个参数，以便我可以在 action 中获取它connectTo。我无法找到正确的语法或方法，也无法理解我在 stackoverflow 上找到的一些答案。我怎样才能做到这一点？
def connectTo
#here i want to get the parameter i pass from link_to from view...
end
回答by Billy Chan
Do not use camel case in variable names and method names in Rails. That's not a convention and will bite you later.
Use named path when you can, instead of manually assign controller and action.
不要在 Rails 中的变量名和方法名中使用驼峰式大小写。这不是约定俗成的，以后会咬你的。
尽可能使用命名路径，而不是手动分配控制器和操作。
For your question, suppose your named path is home_connect_to_path, then
对于您的问题，假设您的命名路径是home_connect_to_path，那么
link_to "Connect", home_connect_to_path(foo_param: 'bar_value')
The link will look like
链接看起来像
http://localhost:3000/home/connect_to?foo_parms=bar_value
Then get it in controller
然后在控制器中获取它
def connect_to
foo = params[:foo_param] # 'bar_value'
