Pass ruby array with Ajax.Request


#1

I am hoping someone can please help me with this. I am trying to pass
an array using Ajax.Request and cannot get it working. This is what I
have so far:

@data is a ruby array

new Ajax.Request( ‘/users/test’, {
parameters: { data: Object.toJSON(<%=
array_or_string_for_javascript(@data) %>)}, asynchronous:true }); })

Does anyone have any ideas?

Thanks.


#2

On Thu, Jan 15, 2009 at 8:05 AM, David removed_email_address@domain.invalid wrote:

Does anyone have any ideas?

new Ajax.Request( ‘/users/test’, {
parameters: { data: <%= @data.to_json %>}, asynchronous:true
}); })

Rails adds a #to_json method to all of the built-in classes.

– Brandon

Training by Collective Idea: Refer a friend and get $100
http://training.collectiveidea.com – San Antonio, TX – Jan 20-23


#3

Nevermind, Its seems to be working now. This is what shows up in the
console:

“data”=>"[object Object]"

and I am wondering, do I have to convert this json array back to ruby
to use it and if so how do I do that?


#4

I tried this, but I still get an error:

undefined method `toJSON’ for []:Array


#5

So Ive decided it might be better to take a step backwards and explain
what I am trying to do to because there may be a better way of doing
it. I have an array of hashes and each hash correlates to an active
record object. Now what I need to do is pass this array to a
controller action using Ajax.Request somehow. I could really use some
help, Ive tried many different ways but none have worked! Thanks.


#6

Hi David,

That depends on what you need the AR objects for, if they are records
that already exist in your database and your controller only need the
reference to them, you’ld be better off passing just the ids (and type
if they differ) and having your controller action fetch the records.

If the data in the active records has changed, or isn’t yet in the
database, I’d have to recommend either using serializing them into a
form to submit to the controller action or turning them into json as
mentioned above.

The response from your test of #to_json you showed before
“data”=>"[object Object]" doesn’t seem right, as the result should be
a string representation of all object’s in the array (and all object
attributes & values)
experiment with it in the console, to get it working, try data.to_json
should work just fine, showing something like:

“[{“object_type”: {“name”: “Hi”, “updated_at”:
“2009-01-16T22:59:51Z”, “id”: 1, “summary_text”: “awesome!”,
“game_id”: 1, “created_at”: “2009-01-16T22:59:51Z”}}]”

where object_type is the name of the AR model, and all the fields and
their values are shown (this example has only one object in the
array).


#7

It seems like there is a better way to pass an array with Ajax.request
into a controller and have it interpreted into a ruby array. Using
link_to_remote, you are able to pass an array using :with ->

<%= link_to_remote ‘Click me’, :url => {:action => “array”}, :with =>
“‘data=’+test()”, :update => ‘testing’%>

Im wondering, isnt there a way to do this using Ajax.Request?