# Render an action if coming from ajax request **URL:** \ **Category:** Rails\ **Created:** [June 8, 2010, 10:20am UTC](https://www.ruby-forum.com/t/render-an-action-if-coming-from-ajax-request/189814 "2010-06-08T10:20:46Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![gregm](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/bc79bd/32.png) [@gregm](https://www.ruby-forum.com/u/gregm)\ **Post date:** [June 8, 2010, 10:20am UTC](https://www.ruby-forum.com/t/render-an-action-if-coming-from-ajax-request/189814/1 "2010-06-08T10:20:46Z")
Hi, I have a Rails web app working, and I am now working on a mobile app using Phonegap. Phonegap works only with javascript/html, so I make Ajax request to my web app and render things if the request is make from Ajax. This is what I have in my controller action if request.xhr? render :controller =\> ‘user\_session’, :action =\> ‘new’, :layout =\> false params[:id].present? render :controller =\> ‘user’, :action =\> ‘new’, :layout =\> false if params[:id].blank? else redirect\_to login\_path if params[:id].present? redirect\_to register\_path if params[:id].blank? end My javascript HOST = ‘localhost:3000’; new Ajax.Request(HOST, { method: ‘get’, onComplete: function(transport){alert(‘kikoo’);} } ); I have two problem with this code, the first one is that it doesn’t recognize that I am making an Ajax request because it is going in the else condition. And the second problem is that if I remove the if statement I have rendering problem, it tries to render the new action from the current controller. Thanks Greg ---
**Author:** ![gregm](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/bc79bd/32.png) [@gregm](https://www.ruby-forum.com/u/gregm)\ **Post date:** [June 8, 2010, 10:44am UTC](https://www.ruby-forum.com/t/render-an-action-if-coming-from-ajax-request/189814/2 "2010-06-08T10:44:35Z")
On 8 June 2010 09:20, Greg Ma [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > false params[:id].present? > There is an ‘if’ missing above Colin ---
**Author:** ![gregm](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/bc79bd/32.png) [@gregm](https://www.ruby-forum.com/u/gregm)\ **Post date:** [June 8, 2010, 10:46am UTC](https://www.ruby-forum.com/t/render-an-action-if-coming-from-ajax-request/189814/3 "2010-06-08T10:46:25Z")
Colin L. wrote: > On 8 June 2010 09:20, Greg Ma [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > false params[:id].present? > > There is an ‘if’ missing above > > Colin > I fixed that, consider the ‘if’ is there ---
**Author:** ![gregm](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/bc79bd/32.png) [@gregm](https://www.ruby-forum.com/u/gregm)\ **Post date:** [June 8, 2010, 11:03am UTC](https://www.ruby-forum.com/t/render-an-action-if-coming-from-ajax-request/189814/4 "2010-06-08T11:03:19Z")
On 8 June 2010 09:20, Greg Ma [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > false params[:id].present? > { > method: ‘get’, > onComplete: function(transport){alert(‘kikoo’);} > } > ); > > I have two problem with this code, the first one is that it doesn’t > recognize that I am making an Ajax request because it is going in the > else condition Have you looked in the log to see what the request is? Have you broken in to the code using ruby-debug for example to check the value of request.xhr? > . And the second problem is that if I remove the if > statement I have rendering problem, it tries to render the new action > from the current controller. Again does the log show anything useful? Colin ---
**Author:** ![gregm](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/bc79bd/32.png) [@gregm](https://www.ruby-forum.com/u/gregm)\ **Post date:** [June 8, 2010, 11:15am UTC](https://www.ruby-forum.com/t/render-an-action-if-coming-from-ajax-request/189814/5 "2010-06-08T11:15:16Z")
Colin L. wrote: > On 8 June 2010 09:20, Greg Ma [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > false params[:id].present? > > { > > �method: ‘get’, > > �onComplete: function(transport){alert(‘kikoo’);} > > } > > ); > > > > I have two problem with this code, the first one is that it doesn’t > > recognize that I am making an Ajax request because it is going in the > > else condition > > Have you looked in the log to see what the request is? Have you > broken in to the code using ruby-debug for example to check the value > of request.xhr? > > > . And the second problem is that if I remove the if > > statement I have rendering problem, it tries to render the new action > > from the current controller. > > Again does the log show anything useful? > > Colin Yes I have check the log and it doesn’t help. I logged each step and I confirm that it is not an Ajax request… Processing HomeController#index (for 127.0.0.1 at 2010-06-08 11:13:56) [OPTIONS] Parameters: {“action”=\>“index”, “id”=\>“”, “controller”=\>“home”} #ActionController::Request:0x7fd5dcc83b88 no current user no xhr Redirected to [http://localhost:3000/register](http://localhost:3000/register) Completed in 15ms (DB: 0) | 302 Found [[http://localhost/?id=](http://localhost/?id=)] ---
**Author:** ![gregm](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/bc79bd/32.png) [@gregm](https://www.ruby-forum.com/u/gregm)\ **Post date:** [June 8, 2010, 11:29am UTC](https://www.ruby-forum.com/t/render-an-action-if-coming-from-ajax-request/189814/6 "2010-06-08T11:29:40Z")
On Jun 8, 10:15 am, Greg Ma [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Yes I have check the log and it doesn’t help. I logged each step and I > confirm that it is not an Ajax request… Rails looks at the X-Requested-With header to see if a request was an ajax one. Prototype, jquery etc. set this header, but if phonegap doesn’t then rails won’t consider it to be an ajax request Fred ---
**Author:** ![gregm](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/bc79bd/32.png) [@gregm](https://www.ruby-forum.com/u/gregm)\ **Post date:** [June 8, 2010, 11:37am UTC](https://www.ruby-forum.com/t/render-an-action-if-coming-from-ajax-request/189814/7 "2010-06-08T11:37:50Z")
Frederick C. wrote: > Rails looks at the X-Requested-With header to see if a request was an > ajax one. Prototype, jquery etc. set this header, but if phonegap > doesn’t then rails won’t consider it to be an ajax request > > Fred I’m not making the Ajax query with phonegap but with prototype ---
**Author:** ![gregm](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/bc79bd/32.png) [@gregm](https://www.ruby-forum.com/u/gregm)\ **Post date:** [June 8, 2010, 10:24pm UTC](https://www.ruby-forum.com/t/render-an-action-if-coming-from-ajax-request/189814/8 "2010-06-08T22:24:53Z")
I don’t understand, I’ve been testing on Firefox and now I am on Safari and it works… Someone has an idea why? ---
**Author:** ![gregm](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/bc79bd/32.png) [@gregm](https://www.ruby-forum.com/u/gregm)\ **Post date:** [June 8, 2010, 4:21pm UTC](https://www.ruby-forum.com/t/render-an-action-if-coming-from-ajax-request/189814/9 "2010-06-08T16:21:13Z")
Frederick C. wrote: > On Jun 8, 10:15�am, Greg Ma [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > Yes I have check the log and it doesn’t help. I logged each step and I > > confirm that it is not an Ajax request… > > Rails looks at the X-Requested-With header to see if a request was an > ajax one. Prototype, jquery etc. set this header, but if phonegap > doesn’t then rails won’t consider it to be an ajax request > > Fred X-Requested-With header looks like this when I execute the Ajac in firebug: Access-Control-Request-He… x-prototype-version,x-requested-with