Rails redirect_to

2018-02-07 10:34:37来源:oschina作者:Kolosek人点击

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Rails redirect_to takes two parameters,optionandresponse_status (optional). It redirects the browser to the target specified in options.


This parameter can be:

Hash - The URL will be generated by calling url_for with the options.

redirect_to action: 'show', id: 2

Record - The URL will be generated by calling url_for with the options.

redirect_to article

String starting with the protocol: // (like http: //) - Is passed straight through as the target for redirection.

redirect_to 'http://www.rubyonrails.org'

String not containing a protocol - The current protocol and the host are prepended to the string.

redirect_to '/images/screenshot.jpg'

Helper method generated by Rails (most commonly used).

redirect_to articles_url

: back - Back to the page that issued the request. Useful for forms that are triggered from multiple places.

redirect_to :back


The redirection happens as a "302 Moved" header unless otherwise specified.


redirect_to profile_url(@profile), :status => :moved_permanently
redirect_to profile_url(@profile), :status => 302

Note: You should always use named codes because it reqires less time to understand the meaning of it. Be sure to check otherstatus codes.


If needed, you can also specify a controller and an action.


redirect_to :controller => 'article', :action => 'index'


You can specify the format, too (in case you need to redirect a request coming in one format to another format).


redirect_to :action => 'show', :format => 'html'


Redirect to your main page, just make sure to configure to root route first.


redirect_to :root


Also, redirect_to does not stop the execution of the function. To terminate the execution of the function immediately after the redirect_to, use return.


redirect_to article_url(@article) and return


Display a flash message upon redirect

The most elegant way to achieve this is to use helper method in ApplicationController and declare which types of flash messages you want to use. For example:


class ApplicationController < ActionController::Base
...
add_flash_types :success, :error
...
end

Then, use it in your controller actions like this:


redirect_to articles_path, success: 'Article is successfully created'


Passing parameters in redirect_to

If you need to pass additional parameter just add it to helper method:


redirect_to article_path(@article, param: 'foo')


will create this path:


"/articles/1?param=foo"


Or, if you want to specify the exact controller and action do:


redirect_to controller: 'articles', action: 'show', id: 1, param: 'foo'


will generate the same path.


Now, you can access it in responding action and do what you intended with it:


def show
@param = params[:param]
...
endRedirect to subdomain

If you're looking to redirect to a subdomain try this:


redirect_to article_url(@article, subdomain: 'sub')


Difference between _url and _path

The main difference between _url and _path is:

by Will give you at The Absolute _url path, containing at The Protocol, Host and Port. the For Example: http://localhost:3000/articles.


_path will return the relative path which is without the domain, protocol etc. So it would be just /articles.

Use redirect_back instead of redirect_to: back

Rails 5 provides redirect_back to redirect to HTTP_REFERER. When HTTP_REFERER is not present, it redirects to whatever is passed as fallback_location.


redirect_back(fallback_location: root_path)


You can pass notice, too:


redirect_back(fallback_location: root_path, notice: "Your message")


The difference between redirect_to and render

Redirect is telling the browser it needs to make a new request to a different location. A render does not change the URL of the page you are visiting.


We have come to an end

Thank you for reading this article, we hope we were able to help!


References: https://apidock.com/rails/ActionController/Base/redirect_tohttp://api.rubyonrails.org/classes/ActionController/Redirecting.htmlhttps://tosbourn.com/difference-between-redirect-render- rails /https://blog.bigbinary.com/2016/02/29/rails-5-improves-redirect_to_back-with-redirect-back.htmlhttps://stackoverflow.com/questions/2350539/what-is-the-difference-between-url-and-path-while-using-the-routes-in-rails


Originally published on kolosek.com .

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