从<a/>谁存储在可变ERB中</a>获取href值

Question

My entire code :

<% query.inline_columns.each do|column| %>
    <% if column.css_classes.to_s != "assigned_to" %>
         <td class="<%= column.css_classes %>"> <%= column_content(column, issue) %> </td>
    <% else %>
         <td class="<%= column.css_classes %>"> <%= test = column_content(column, issue) %> </td>
    <% end %>
<% end %>

I have something like that:

test = column_content(column, issue)

and when i go on the website it give me something like that:

<a class="user active" href="/users/5">Test</a>

My question is how can I get the value of href ? I tried test.href, test.link_to and test.link but don't work.

And after when we have the href it's possible to only have the id in href ? (In the href above it's 5) BUT I don't want to go on page and get the id, I just want to have it so I can load the picture of user in the table.

I'm beginner in ERB language, thank's for help !

EDIT : My solution to get the id :

test.to_s.split("href=\"").last.to_s.split("\"").first.to_s.split("/").last.to_s

Thank's guy to try to help me !

Answer 1

The Request cycle:

In Rails and in MVC every request follows a cycle:

Let's say you type in http://localhost:3000/users .

1. The request hits your Rails server and goes through Rack to your routes.
2. Rails picks a controller and action which matches the request.
3. Rails runs your UsersController#index and renders the view.
4. The rendered html is sent back to the client.

So why am I telling you this?

It has nothing to do with ERB .

You simply render the view and send it to the client - all done. The client can interact by clicking links or submitting forms. But it's not your actual view communicating back.

When the user clicks the link it starts a whole new request - it's a whole new process*.

Routes & Params

Routes are kind of like regular expressions - with superpowers.

If you want your rails app to handle the request to /users/1 you need to create a route:

 # config/routes.rb
 get `/users/:id`, to: 'users#show'

See the :id part? That means we can get the ID passed in the url from params[:id] .

class UsersController
  def show
    @user = User.find(params[:id])
  end
end

Of course writing your routes like that is pretty tedious. So instead we write:

resources :users

Try running rake routes from the console to see what it does.