Rails - Dec 2010 - Rails - JSON object with an array?

Hello, I''m able to create and send a JSON object like so:

      @mylist << {
        :id => item.id,
        :name => name.id
      }

    render :json => { :result => ''success'', :mylist
=> @mylist }

That works great. Problem I''m having now is that I need to include
users which can be 1 or users per item.


      @mylist << {
        :id => item.id,
        :name => name.id,
        :users => item.users
      }

Where `item.users` contains a list of (user.id, user.name, user.desc).

how do I include an array like users inside a json object? Right now
it is including all the user columns which I don''t need. How can I
specify which columns to include. Also it appears to be breaking the
JSON object, now everything following the first item.users in the JSON
object is:

,{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},
{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{}],"result":"success"}


Thanks

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UPDATE

the code above is inside a:

@items.each_with_index do |item, i|
end
Perhaps that is a problem here?



On Dec 21, 5:07 pm, CuriousNewbie
<bhellm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Hello, I''m able to create and send a JSON object like so:
>
>       @mylist << {
>         :id => item.id,
>         :name => name.id
>       }
>
>     render :json => { :result => ''success'', :mylist
=> @mylist }
>
> That works great. Problem I''m having now is that I need to include
> users which can be 1 or users per item.
>
>       @mylist << {
>         :id => item.id,
>         :name => name.id,
>         :users => item.users
>       }
>
> Where `item.users` contains a list of (user.id, user.name, user.desc).
>
> how do I include an array like users inside a json object? Right now
> it is including all the user columns which I don''t need. How can I
> specify which columns to include. Also it appears to be breaking the
> JSON object, now everything following the first item.users in the JSON
> object is:
>
> ,{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},
>
{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{}],"result":"success"}
>
> Thanks
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On Dec 22, 2010, at 1:28 AM, CuriousNewbie wrote:
> UPDATE
> 
> the code above is inside a:
> 
> @items.each_with_index do |item, i|
> end
> Perhaps that is a problem here?
> 
> 
> 
> On Dec 21, 5:07 pm, CuriousNewbie
<bhellm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> Hello, I''m able to create and send a JSON object like so:
>> 
>>       @mylist << {
>>         :id => item.id,
>>         :name => name.id
>>       }
>> 
>>     render :json => { :result => ''success'',
:mylist => @mylist }
>> 
>> That works great. Problem I''m having now is that I need to
include
>> users which can be 1 or users per item.
>> 
>>       @mylist << {
>>         :id => item.id,
>>         :name => name.id,
>>         :users => item.users
>>       }
>> 
>> Where `item.users` contains a list of (user.id, user.name, user.desc).
>> 
>> how do I include an array like users inside a json object? Right now
>> it is including all the user columns which I don''t need. How
can I
>> specify which columns to include. Also it appears to be breaking the
>> JSON object, now everything following the first item.users in the JSON
>> object is:
>> 
>> ,{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},
>>
{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{}],"result":"success"}
I think you are running into problems because you are not following strictly 
the MVC pattern. 

I assume the code pasted is executed by the controller, correct?
Maybe you should look at the as_json method to define json format from
the model itself. 
For example, if Item is a model (inherited from ActiveRecord) and User
is too, you should be fine defining two as_json methods inside the two
models. That should allow you to render the data in the controller with a
simple:

render :json => @list

If you need more "customization", you should consider redendering json
via an erb view (leave the controller alone!!! :D).
>> 
>> Thanks
> 
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> 
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