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Ram

2009-Apr-08 05:51 UTC

Conditionally respond with HTTP redirect for xml_http_request

Hi all,

I have select box in one of my views which lists a few contacts.
I also have an option in this select box to add a new contact.
There is also an observe_field hook to this select box that Ajax
requests further info about the selected contact from the controller
and displays it in an adjacent "info" div.

Now, I need to redirect the user to the New Contact page from the
controller if the selected value from the select box is "new contact".

This is the controller code I have now
....
if request.xml_http_request?
  if !@contact.blank?
    render :partial => "show", :layout => false
  elsif params[:id] == "new contact"
    redirect_to new_contact_path
  else
    render :text => "Please select a contact"
  end
end

This renders the New Contact page in the "info" div. Whereas, I want
the user to be completely redirected to the New Contact page like a
HTTP response would.
Any thoughts on how I can handle this? Any ideas welcome..
Thanks!


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Frederick Cheung

2009-Apr-08 07:20 UTC

head link

Re: Conditionally respond with HTTP redirect for xml_http_request

On Apr 8, 6:51 am, Ram
<yourstruly.vi...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Hi all,
>
> I have select box in one of my views which lists a few contacts.
> I also have an option in this select box to add a new contact.
> There is also an observe_field hook to this select box that Ajax
> requests further info about the selected contact from the controller
> and displays it in an adjacent "info" div.
>
> Now, I need to redirect the user to the New Contact page from the
> controller if the selected value from the select box is "new
contact".
>
> This is the controller code I have now
> ....
> if request.xml_http_request?
>   if !...@contact.blank?
>     render :partial => "show", :layout => false
>   elsif params[:id] == "new contact"
>     redirect_to new_contact_path
>   else
>     render :text => "Please select a contact"
>   end
> end
>
> This renders the New Contact page in the "info" div. Whereas, I
want
> the user to be completely redirected to the New Contact page like a
> HTTP response would.
> Any thoughts on how I can handle this? Any ideas welcome..
> Thanks!
Two ways of doing this: either the observe_field thingy has a callback
that redirects in the right circumstances or you switch to using
render :update (and then use page.redirect_to), In the latter case you
have to use render :update for all of these 3 possibilities and you
need to change your observe_field invocation to not pass the :update
option.

Fred
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Ram

2009-Apr-08 07:38 UTC

head link

Re: Conditionally respond with HTTP redirect for xml_http_request

Hi Fred,

Thanks for your response.

render :update
Ive got quite a few Ruby conditions and styling going in the js.erb
file im using now to display the contact information. And ive got more
possibilities than the 3 ive shown above in the controller. So this
might not be the right option for me. Right?

observe_field callback
This might work for me. Right now, the only callbacks I have on the
observe_field are showing and hiding the spinner. I have never written
custom callbacks on Rails JS helpers. Could you help me through this?

So im guessing I should be having something like this

<%= observe_field ''contact_id'', :frequency => 0.5,
:update =>
''info'', :before =>
"Element.show(''spinner'')",
		:success => "handle_contact_request(value);", :url =>
show_contact_path,:method =>:get,
		:with => ''contact_id'' %>

and in application.js

function handle_contact_request(value){

         Element.hide(''spinner'');
         if value=="new contact"
         {
                //how do i redirect to the New Contact page?
         }
         else
         {
               //show contact info. But how do I handle the conditions
and styling??
         }
}

Am I getting the basic idea right? If yes, how can I handle the
conditional redirecting and the rest in Javascript?
Thanks again Fred.

On Apr 8, 12:20 pm, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> On Apr 8, 6:51 am, Ram
<yourstruly.vi...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>
>
> > Hi all,
>
> > I have select box in one of my views which lists a few contacts.
> > I also have an option in this select box to add a new contact.
> > There is also an observe_field hook to this select box that Ajax
> > requests further info about the selected contact from the controller
> > and displays it in an adjacent "info" div.
>
> > Now, I need to redirect the user to the New Contact page from the
> > controller if the selected value from the select box is "new
contact".
>
> > This is the controller code I have now
> > ....
> > if request.xml_http_request?
> >   if !...@contact.blank?
> >     render :partial => "show", :layout => false
> >   elsif params[:id] == "new contact"
> >     redirect_to new_contact_path
> >   else
> >     render :text => "Please select a contact"
> >   end
> > end
>
> > This renders the New Contact page in the "info" div.
Whereas, I want
> > the user to be completely redirected to the New Contact page like a
> > HTTP response would.
> > Any thoughts on how I can handle this? Any ideas welcome..
> > Thanks!
>
> Two ways of doing this: either the observe_field thingy has a callback
> that redirects in the right circumstances or you switch to using
> render :update (and then use page.redirect_to), In the latter case you
> have to use render :update for all of these 3 possibilities and you
> need to change your observe_field invocation to not pass the :update
> option.
>
> Fred--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
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Frederick Cheung

2009-Apr-08 07:57 UTC

head link

Re: Conditionally respond with HTTP redirect for xml_http_request

On Apr 8, 8:38 am, Ram
<yourstruly.vi...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Hi Fred,
>
> Thanks for your response.
>
> render :update
> Ive got quite a few Ruby conditions and styling going in the js.erb
> file im using now to display the contact information. And ive got more
> possibilities than the 3 ive shown above in the controller. So this
> might not be the right option for me. Right?
I''m not sure this would be a problem - seems like a few calls to
page.replace_html ''info'', :partial =>
''blah'' would do it in the other
cases.
>
> observe_field callback
> This might work for me. Right now, the only callbacks I have on the
> observe_field are showing and hiding the spinner. I have never written
> custom callbacks on Rails JS helpers. Could you help me through this?
>
> So im guessing I should be having something like this
>
> <%= observe_field ''contact_id'', :frequency => 0.5,
:update =>
> ''info'', :before =>
"Element.show(''spinner'')",
>                 :success => "handle_contact_request(value);",
:url =>
> show_contact_path,:method =>:get,
>                 :with => ''contact_id'' %>
>
Nearly. your success callback gets 2 thigns: response and
responseJSON. responseJSON contains whatever JSON you put in the X-
JSON header of your response. You callback can be as simple as

check_for_redirect(json){
  if(json && json.redirect)
    page.location = json.redirect
}

and then pass :success => "check_for_redirect(responseJSON)". All
you
need to do is to set that header appropriately if you want a redirect
to happen.

Fred



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Ram

2009-Apr-08 08:46 UTC

head link

Re: Conditionally respond with HTTP redirect for xml_http_request

:) You were right. It was easy enough to use render :update and
replace_html with :partial to accomplish it.

I am however curious as to how we can do this using JSON. I started
reading about JSON for another feature I needed but I realised I dint
need JSON for it. I feel it would be a good exercise for me to
implement it in tackling this problem. Could you explain a little bit
more about the code you have shown me above or point me to where I can
find the documentation explaining this? From what I remember, JSON is
a format (Object Notation) to represent ActiveRecord objects (in
Rails) for JS to handle. But setting the header, responseJSON et all
is new to me.

Thanks Fred!


On Apr 8, 12:57 pm, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> On Apr 8, 8:38 am, Ram
<yourstruly.vi...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > Hi Fred,
>
> > Thanks for your response.
>
> > render :update
> > Ive got quite a few Ruby conditions and styling going in the js.erb
> > file im using now to display the contact information. And ive got more
> > possibilities than the 3 ive shown above in the controller. So this
> > might not be the right option for me. Right?
>
> I''m not sure this would be a problem - seems like a few calls to
> page.replace_html ''info'', :partial =>
''blah'' would do it in the other
> cases.
>
>
>
> > observe_field callback
> > This might work for me. Right now, the only callbacks I have on the
> > observe_field are showing and hiding the spinner. I have never written
> > custom callbacks on Rails JS helpers. Could you help me through this?
>
> > So im guessing I should be having something like this
>
> > <%= observe_field ''contact_id'', :frequency =>
0.5, :update =>
> > ''info'', :before =>
"Element.show(''spinner'')",
> >                 :success =>
"handle_contact_request(value);", :url =>
> > show_contact_path,:method =>:get,
> >                 :with => ''contact_id'' %>
>
> Nearly. your success callback gets 2 thigns: response and
> responseJSON. responseJSON contains whatever JSON you put in the X-
> JSON header of your response. You callback can be as simple as
>
> check_for_redirect(json){
>   if(json && json.redirect)
>     page.location = json.redirect
>
> }
>
> and then pass :success => "check_for_redirect(responseJSON)".
All you
> need to do is to set that header appropriately if you want a redirect
> to happen.
>
> Fred--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
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Ram

2009-Apr-08 08:57 UTC

head link

Re: Conditionally respond with HTTP redirect for xml_http_request

I am trying to implement Craig Ambrose''s Redbox for some form
submissions.
Ideally for me, when the user selects "Add contact" a redbox modal
window should open with the New Contact form and on submission, the
contacts select box on the main page should get updated with the newly
added contact.
I was looking into invoking Redbox from the controller for this
(http://ahref.in/8dc58) but I couldnt quite grasp the discussion
there.
Can Redbox be brought in here without too much trouble?
thanks again for you inputs!

On Apr 8, 1:46 pm, Ram
<yourstruly.vi...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> :) You were right. It was easy enough to use render :update and
> replace_html with :partial to accomplish it.
>
> I am however curious as to how we can do this using JSON. I started
> reading about JSON for another feature I needed but I realised I dint
> need JSON for it. I feel it would be a good exercise for me to
> implement it in tackling this problem. Could you explain a little bit
> more about the code you have shown me above or point me to where I can
> find the documentation explaining this? From what I remember, JSON is
> a format (Object Notation) to represent ActiveRecord objects (in
> Rails) for JS to handle. But setting the header, responseJSON et all
> is new to me.
>
> Thanks Fred!
>
> On Apr 8, 12:57 pm, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> wrote:
>
> > On Apr 8, 8:38 am, Ram
<yourstruly.vi...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > > Hi Fred,
>
> > > Thanks for your response.
>
> > > render :update
> > > Ive got quite a few Ruby conditions and styling going in the
js.erb
> > > file im using now to display the contact information. And ive got
more
> > > possibilities than the 3 ive shown above in the controller. So
this
> > > might not be the right option for me. Right?
>
> > I''m not sure this would be a problem - seems like a few calls
to
> > page.replace_html ''info'', :partial =>
''blah'' would do it in the other
> > cases.
>
> > > observe_field callback
> > > This might work for me. Right now, the only callbacks I have on
the
> > > observe_field are showing and hiding the spinner. I have never
written
> > > custom callbacks on Rails JS helpers. Could you help me through
this?
>
> > > So im guessing I should be having something like this
>
> > > <%= observe_field ''contact_id'', :frequency
=> 0.5, :update =>
> > > ''info'', :before =>
"Element.show(''spinner'')",
> > >                 :success =>
"handle_contact_request(value);", :url =>
> > > show_contact_path,:method =>:get,
> > >                 :with => ''contact_id'' %>
>
> > Nearly. your success callback gets 2 thigns: response and
> > responseJSON. responseJSON contains whatever JSON you put in the X-
> > JSON header of your response. You callback can be as simple as
>
> > check_for_redirect(json){
> >   if(json && json.redirect)
> >     page.location = json.redirect
>
> > }
>
> > and then pass :success =>
"check_for_redirect(responseJSON)". All you
> > need to do is to set that header appropriately if you want a redirect
> > to happen.
>
> > Fred--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
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Rails - Apr 2009 - Conditionally respond with HTTP redirect for xml_http_request

Conditionally respond with HTTP redirect for xml_http_request

Re: Conditionally respond with HTTP redirect for xml_http_request

Re: Conditionally respond with HTTP redirect for xml_http_request

Re: Conditionally respond with HTTP redirect for xml_http_request

Re: Conditionally respond with HTTP redirect for xml_http_request

Re: Conditionally respond with HTTP redirect for xml_http_request