# If.request.xhr? **URL:** \ **Category:** Rails\ **Created:** [October 17, 2006, 1:25pm UTC](https://www.ruby-forum.com/t/if-request-xhr/72471 "2006-10-17T13:25:15Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![zanoni](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/z/e99b99/32.png) [@zanoni](https://www.ruby-forum.com/u/zanoni)\ **Post date:** [October 17, 2006, 1:25pm UTC](https://www.ruby-forum.com/t/if-request-xhr/72471/1 "2006-10-17T13:25:15Z")
Hope I’m not to far off base here - I want a link that will first go the controller, test for javascript and then re-direct to either ajax or non-ajax page. I have the controller code set up but a bit unsure about the link itself Do I need to use a link\_to\_remote link to get the user over to the controller /action and if.request.xhr? or should just a link\_to work. I ask because a link\_to doesn’t seem to mean anything , js is turned on and still wind up at the non-ajax form. Stuart – > **[Dark ambient](https://en.wikipedia.org/wiki/Dark_ambient)** > > Dark ambient (referred to as ambient industrial especially in the 1980s) is a genre of post-industrial music that features an ominous, dark droning and often gloomy, monumental or catacombal atmosphere, partially with discordant overtones. It shows similarities with ambient music, a genre that has been cited as a main influence by many dark ambient artists, both conceptually and compositionally. Although mostly electronically generated, dark ambient also includes the sampling of hand-pla > The te... ---
**Author:** ![zanoni](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/z/e99b99/32.png) [@zanoni](https://www.ruby-forum.com/u/zanoni)\ **Post date:** [October 17, 2006, 1:51pm UTC](https://www.ruby-forum.com/t/if-request-xhr/72471/2 "2006-10-17T13:51:29Z")
Hi, If your using the normal link\_to helper, your link wont use a xmlhttprequest-object to send the request, but a normal get/post request. Link\_to\_remote uses the prototype javascript library to send an ajax-request and you will be able to recognize the request as ajax in your controller. Richard ---
**Author:** ![zanoni](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/z/e99b99/32.png) [@zanoni](https://www.ruby-forum.com/u/zanoni)\ **Post date:** [October 17, 2006, 1:57pm UTC](https://www.ruby-forum.com/t/if-request-xhr/72471/3 "2006-10-17T13:57:31Z")
On 10/17/06, removed\_email\_address@domain.invalid [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Richard > Okay, that’s what I thought. However , the link isn’t working , meaning > right now when I place the mouse over the link it says /mydomain/# I have this in the html doc: \<%= javascript\_include\_tag "prototype" %\> And have composed the link as such (though I’ve tried a few different variations) \<%= link\_to\_remote ‘Search’, {:url =\> { :action =\> ‘failover’ }} %\> Shouldn’t that create the link ? Thank you Stuart – > **[Dark ambient](https://en.wikipedia.org/wiki/Dark_ambient)** > > Dark ambient (referred to as ambient industrial especially in the 1980s) is a genre of post-industrial music that features an ominous, dark droning and often gloomy, monumental or catacombal atmosphere, partially with discordant overtones. It shows similarities with ambient music, a genre that has been cited as a main influence by many dark ambient artists, both conceptually and compositionally. Although mostly electronically generated, dark ambient also includes the sampling of hand-pla > The te... ---
**Author:** ![zanoni](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/z/e99b99/32.png) [@zanoni](https://www.ruby-forum.com/u/zanoni)\ **Post date:** [October 17, 2006, 5:10pm UTC](https://www.ruby-forum.com/t/if-request-xhr/72471/4 "2006-10-17T17:10:50Z")
Dark A. \ writes: > Okay, that’s what I thought. However , the link isn’t working , meaning > right now when I place the mouse over the link it says /mydomain/# That’s because the link is called with Javascript and coded into a JS function call, whereas the status bar only shows the value of the link’s href attribute. View Source and you’ll see an onclick which actually calls the remote call. The itself never actually gets activated, it’s disabled by the javascript in the s onclick. If you want, you can supply a URL to be called if people have javascript switched off, by adding an :href to the link\_to\_remote: \<%= link\_to\_remote “Text”, {:controller =\> blah, :action =\> blah}, {:href =\> url\_for(:controller =\> blah2, :action =\> blah3)} This will allow non-javascript users to access your site and possibly get the information they would have gotten, at the cost of a full page request. That’s not an automatic thing thought, your code has to be able to deal with both requests Gareth ---
**Author:** ![zanoni](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/z/e99b99/32.png) [@zanoni](https://www.ruby-forum.com/u/zanoni)\ **Post date:** [October 17, 2006, 5:04pm UTC](https://www.ruby-forum.com/t/if-request-xhr/72471/5 "2006-10-17T17:04:48Z")
Bump 🙂 On 10/17/06, Dark A. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > an ajax-request and you will be able to recognize the request as ajax > > \<%= javascript\_include\_tag “prototype” %\> > > And have composed the link as such (though I’ve tried a few different > variations) > \<%= link\_to\_remote ‘Search’, {:url =\> { :action =\> ‘failover’ }} %\> > > Shouldn’t that create the link ? Maybe I’m way off base here. I am looking at a codecite presentation. I’ve set up my controller action as such: def failover if request.xhr? redirect\_to :controller =\> ‘ajaxsearch’, :action =\> ‘index’ else redirect\_to :controller =\> ‘searches’, :action =\> ‘new’ – > **[Dark ambient](https://en.wikipedia.org/wiki/Dark_ambient)** > > Dark ambient (referred to as ambient industrial especially in the 1980s) is a genre of post-industrial music that features an ominous, dark droning and often gloomy, monumental or catacombal atmosphere, partially with discordant overtones. It shows similarities with ambient music, a genre that has been cited as a main influence by many dark ambient artists, both conceptually and compositionally. Although mostly electronically generated, dark ambient also includes the sampling of hand-pla > The te... ---
**Author:** ![zanoni](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/z/e99b99/32.png) [@zanoni](https://www.ruby-forum.com/u/zanoni)\ **Post date:** [October 17, 2006, 5:49pm UTC](https://www.ruby-forum.com/t/if-request-xhr/72471/6 "2006-10-17T17:49:18Z")
On 10/17/06, Dark A. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > right now when I place the mouse over the link it says /mydomain/# > > > the s onclick. > > > information they would have gotten, at the cost of a full page request. > > > \<%= link\_to\_remote “Search for jobs”, {:controller =\> ‘ajaxsearch’, > > > > Am I totally lame and missing something or is something weird going on ? > > > > Stuart Alright, I think I got it now , I added the needed div / dom id. Which updated the page the link is on. I guess that is the way it’s intended to work. Stuart – > **[Dark ambient](https://en.wikipedia.org/wiki/Dark_ambient)** > > Dark ambient (referred to as ambient industrial especially in the 1980s) is a genre of post-industrial music that features an ominous, dark droning and often gloomy, monumental or catacombal atmosphere, partially with discordant overtones. It shows similarities with ambient music, a genre that has been cited as a main influence by many dark ambient artists, both conceptually and compositionally. Although mostly electronically generated, dark ambient also includes the sampling of hand-pla > The te... ---
**Author:** ![zanoni](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/z/e99b99/32.png) [@zanoni](https://www.ruby-forum.com/u/zanoni)\ **Post date:** [October 17, 2006, 6:41pm UTC](https://www.ruby-forum.com/t/if-request-xhr/72471/7 "2006-10-17T18:41:39Z")
Dark A. \ writes: > Alright, I think I got it now , I added the needed div / dom id. Which updated > the page the link is on. I guess that is the way it’s intended to work. > > Stuart That’ll be my bad, for trying to guess the link\_to\_remote function call. Well done for working it out ---
**Author:** ![zanoni](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/z/e99b99/32.png) [@zanoni](https://www.ruby-forum.com/u/zanoni)\ **Post date:** [October 17, 2006, 5:16pm UTC](https://www.ruby-forum.com/t/if-request-xhr/72471/8 "2006-10-17T17:16:53Z")
On 10/17/06, Gareth A. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > attribute. > \<%= link\_to\_remote “Text”, {:controller =\> blah, :action =\> blah}, {:href > Gareth > Thanks Gareth. Unfortunately then something is going wrong here. > I created the link\_to\_remote - > \<%= link\_to\_remote “Search for jobs”, {:controller =\> ‘ajaxsearch’, > :action > =\> ‘search’}, {:href =\> > url\_for(:controller =\> ‘searches’, :action =\> ‘new’)}%\> I believe that is right. With javascript turned on the link does nothing. With js off, I get taken to the right place. Page source : [Search for jobs](https://www.ruby-forum.com/searches/new) Am I totally lame and missing something or is something weird going on ? Stuart