There are three tag options available for the auto_discovery_link_tag: You can use these tags in layouts or other views, although the auto_discovery_link_tag, javascript_include_tag, and stylesheet_link_tag, are most commonly used in the section of a layout. There are six asset tag helpers available in Rails: Within a layout, you have access to three tools for combining different bits of output to form the overall response:Īsset tag helpers provide methods for generating HTML that link views to feeds, JavaScript, stylesheets, images, videos, and audios. When Rails renders a view as a response, it does so by combining the view with the current layout, using the rules for finding the current layout that were covered earlier in this guide. path=/ HttpOnly Cache-Control : no-cache Copy 3 Structuring Layouts HTTP / 1.1 201 Created Connection : close Date : Sun, 12:16:44 GMT Transfer-Encoding : chunked Location : /photos/1 Content-Type : text/html charset=utf-8 X-Runtime : 0.083496 Set-Cookie : _blog_session=.snip. We can demonstrate one way to handle this with a contrived example: While in a small application, this added latency might not be a problem, it is something to think about if response time is a concern.
Disable link css ruby on rails haml code#
The only downside to this code is that it requires a round trip to the browser: the browser requested the show action with /books/1 and the controller finds that there are no books, so the controller sends out a 302 redirect response to the browser telling it to go to /books/, the browser complies and sends a new request back to the controller asking now for the index action, the controller then gets all the books in the database and renders the index template, sending it back down to the browser which then shows it on your screen. With this code, the browser will make a fresh request for the index page, the code in the index method will run, and all will be well. nil? redirect_to action: :index end end Copy Rails understands both numeric status codes and the corresponding symbols shown below. Render status: 500 render status: :forbidden Copy For example, if you have this code in your BooksController class: By default, controllers in Rails automatically render views with names that correspond to valid routes. Default rendering is an excellent example of this. You've heard that Rails promotes "convention over configuration".
Disable link css ruby on rails haml full#
Call render to create a full response to send back to the browser.2 Creating Responsesįrom the controller's point of view, there are three ways to create an HTTP response: You'll see all of those paths later in this guide. If the response is a full-blown view, Rails also does some extra work to wrap the view in a layout and possibly to pull in partial views. In broad strokes, this involves deciding what should be sent as the response and calling an appropriate method to create that response. It's that handoff that is the subject of this guide. But then, when it's time to send a response back to the user, the Controller hands things off to the View. As you know, the Controller is responsible for orchestrating the whole process of handling a request in Rails, though it normally hands off any heavy code to the Model. This guide focuses on the interaction between Controller and View in the Model-View-Controller triangle.
0 kommentar(er)
