By Dave Thomas
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Additional info for Agile Web Development with Rails: A Pragmatic Guide
The first part of the path is the name of the controller, and the second part is the name of the action. 3, on the following page. Our First Action Let’s add an action called hello to our say controller. From the discussion in the previous section, we know that adding a hello action means creating a method called hello in the class SayController. But what should it do? For now, it doesn’t have to do anything. Remember that a controller’s job is to set up things so that the view knows what to display.
We already know that Rails uses a convention to parse the URL into a target controller and an action within that controller. So a simple approach would be to adopt this URL convention for our links. rhtml would contain the following. ...
... rhtml would point the other way. ...
... This approach would certainly work, but it’s a bit fragile. If we were to move our application to a different place on the web server, the URLs would no longer be valid.
This approach would certainly work, but it’s a bit fragile. If we were to move our application to a different place on the web server, the URLs would no longer be valid. It also encodes assumptions about the Rails URL format into our code; it’s possible a future version of Rails might change this. Fortunately, these aren’t risks we have to take. Rails comes with a bunch of helper methods that can be used in view templates. 6. The link_to method can do a lot more than this, but let’s take it gently for now....
Agile Web Development with Rails: A Pragmatic Guide by Dave Thomas