Convert javascript array to ruby array

Hey can anyone help me convert a javascript array into a ruby array.
Ive been struggling with this since friday to no avail. This is the
function with the ajax.request call that is supposed to convert the
array using JSON, but I keep getting a 422(Unprocessable Entity)
error. Im not sure what is wrong.

        function test()
        {
              for(i=1;i<22;i++){
                    if (document.getElementById(i+'d').className ==
"selected"){
                        myArray.push(i);
                    }
                }

new Ajax.Request('/appointments/array/',
{method:'get',postBody:"'data='+myArray.toJSON"});

         }

Thanks for any input!

Sorry, that ajax.request method should be a put, so:

new Ajax.Request('/appointments/array/',
{method:'post',postBody:"'data='+myArray.toJSON"});

Sorry, that ajax.request method should be a put, so:

new Ajax.Request('/appointments/array/',
{method:'post',postBody:"'data='+myArray.toJSON"});

If you're just posting json then you shouldn't that data= (and you
look like you're writing a link_to_remote :with option - right now
you're posting the string "'data='+myArray.toJSON")

something like

postBody: Object.toJSON(myArray)

is more like it. You might also need to set the content-type header
appropriately.

Fred

Yea, I am trying to just use the link_to_remote helper now, but aside
from converting the array and using JSON, I can't even get the
link_to_remote to route now. I am using:

<%= link_to_remote 'Click me', :url => {:action => "update"}, :with
=> 'test' %>

and the only action that works successfully is the new action, so

<%= link_to_remote 'Click me', :url => {:action => "new"}, :with =>
'test' %>

routes successfully, but this is not what i want. I get this error in
firebug:

POST http://localhost:3000/appointments/update500 241ms.

Do you have any idea why this is happening?

Yea, I am trying to just use the link_to_remote helper now, but aside
from converting the array and using JSON, I can't even get the
link_to_remote to route now. I am using:

<%= link_to_remote 'Click me', :url => {:action => "update"}, :with
=> 'test' %>

and the only action that works successfully is the new action, so

<%= link_to_remote 'Click me', :url => {:action => "new"}, :with =>
'test' %>

routes successfully, but this is not what i want. I get this error in
firebug:

POST http://localhost:3000/appointments/update500 241ms.

I assume that's telling you that the server returned a 500 error,
which means check your logs.

Fred

okay, thanks for the heads up. The error says, TypeError (exception
object expected). Not sure what this means, do you have any idea?

okay, thanks for the heads up. The error says, TypeError (exception
object expected). Not sure what this means, do you have any idea?

Usually it means you tried to raise something that isn't an exception,
but without a backtrace or seeing the line that cause this error it's
hard to say.

Fred

This is the line that caused the error: <%= link_to_remote 'Click
me', :url => {:controller => "appointments", :action =>
"array"}, :with => "test"%>. These are the lines that follow the
error:
TypeError (exception object expected):
    /app/controllers/appointments_controller.rb:72:in `raise'
    /app/controllers/appointments_controller.rb:72:in `array'
    C:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/
actionpack-2.0.2/lib/action_controller/base.rb:1158:in `send'
    C:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/
actionpack-2.0.2/lib/action_controller/base.rb:1158:in
`perform_action_without_filters'
    C:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/
actionpack-2.0.2/lib/action_controller/filters.rb:697:in
`call_filters'
    C:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/
actionpack-2.0.2/lib/action_controller/filters.rb:689:in
`perform_action_without_benchmark'
    C:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/
actionpack-2.0.2/lib/action_controller/benchmarking.rb:68:in
`perform_action_without_rescue'
    C:/InstantRails-2.0-win/ruby/lib/ruby/1.8/benchmark.rb:293:in
`measure'

Not sure if this is helpful at all. Thanks for your help.

This is the line that caused the error: <%= link_to_remote 'Click
me', :url => {:controller => "appointments", :action =>
"array"}, :with => "test"%>. These are the lines that follow the

No, that line didn't cause the error. That piece of code worked just
fine and generated a link you clicked on, and processing that request
caused the error

error:
TypeError (exception object expected):
/app/controllers/appointments_controller.rb:72:in `raise'
/app/controllers/appointments_controller.rb:72:in `array'

This is the line causing the error (and it looks like you're calling
raise yourself)

Fred

Yea, you were right, its been a long day....but i have finally figured
it out. Thanks for your help. For anyone who is trying to convert a
javascript array to a ruby array and pass the array to the controller
you can follow this advice:
create a javascript function that returns the array with the toJSON()
function, so like this:
function example(){
        myArray = new Array();
        .......
        return myArray.toJSON()
}

you can then send this converted array to an action using the
link_to_remote ajax helper by calling your javascript function within
the :with parameter like so:

<%= link_to_remote 'Click me', :url => {:action => "array"}, :with =>
"'data='+test()", :update => 'testing'%>

Your array will then be accessible in params[:data] in you action
(array in this case)

So it turns out the call myArray.toJSON() only converts the javascript
array myArray to a string. I have implemented a work around parse to
convert the string into an array, but i was wondering if anyone knows
of a JSON method to convert directly to a ruby array. Maybe this
would be faster?

So it turns out the call myArray.toJSON() only converts the javascript
array myArray to a string. I have implemented a work around parse to
convert the string into an array, but i was wondering if anyone knows
of a JSON method to convert directly to a ruby array. Maybe this
would be faster?

What would that even mean? Everything the browser sends to the server
is serialized in some format - there's no escaping that.

Fred