在json数据上使用eval（）

Question

I'm trying to use eval on a json formatted dataset to retrieve the value of an attribute i.e.,

[{"item_one":1, "item_two": 2, "item_three": 3}]

I'm using dajax for the ajax call within django like this:

@dajaxice_register
def get_current_id(request):
    home_timeline = oauth_req(
    'http://api.twitter.com/1/statuses/home_timeline.json?count=1',
    settings.TWITTER_TOKEN_KEY,
    settings.TWITTER_TOKEN_SECRET
    )
    return simplejson.dumps({'home_timeline': home_timeline })

which gets this as it's callback:

function get_current_id_callback(data){
      if(data==Dajaxice.EXCEPTION){
        alert('Error! Something happens!');
      }
      else{
        console.log(data.home_timeline);
      }
    }

I don't understand why this gives me undefined:

console.log(eval(data.home_timeline.item_one))

what's the correct way to retrieve the value of item_one?

Thanks.

Answer 1

If data is still a string, then you need to eval(data) (or as @cHao suggests, parse it) to yield a javascript object capable of being dereferenced.

If it's not just a string, it should not be eval'd first.