[mochikit] can log but unable to return value from addCallback

[hotani]

I can log the value, but it returns as undefined.

var getOffice = function(county_id) {
var d = loadJSONDoc('/office_from_countytype/'+ county_id +'/');
var off_id;
d.addCallback(function (result) {
off_id=result[0].fields['office'];
log('got office id: '+ off_id);
return off_id;
});
}

The log entry will show INFO: got office id: 14, but the function
returns undefined.

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[mochikit] Re: can log but unable to return value from addCallback

[hotani]

thanks for the response - I'll give this a try. I'm still trying to
wrap my head around the concepts of deferred and callbacks

On Nov 15, 2:45 pm, Fredrik fblomqv...@gmail.com wrote:
 You're confusing the return inside addCallback with the return from
 the outer getOffice function.

 --- modified example:
 var getOffice = function(county_id) {
     var d = loadJSONDoc('/office_from_countytype/'+ county_id +'/');
     var off_id;
     d.addCallback(function (result) {
         off_id=result[0].fields['office'];
         log('got office id: '+ off_id);
         return off_id;
     });
    return d; // --- !

 }

 ... now, a user can get 'off_id' like this.

 var d = getOffice(country_id);
 d.addCallback(function(off_id) {
     log('got office id:', off_id);

 });

 (since getOffice makes an asynchronous request any return from it
 must, by definition, also be asynchronous.)

 HTH
 // Fredrik Blomqvist

 On Nov 15, 7:04 pm, hotani hot...@gmail.com wrote:







  I can log the value, but it returns as undefined.

  var getOffice = function(county_id) {
      var d = loadJSONDoc('/office_from_countytype/'+ county_id +'/');
      var off_id;
      d.addCallback(function (result) {
          off_id=result[0].fields['office'];
          log('got office id: '+ off_id);
          return off_id;
      });

  }

  The log entry will show INFO: got office id: 14, but the function
  returns undefined.

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[mochikit] Re: createDom option example please

[hotani]

Ok. Like I say, this is not very clear to me right now, and I'm trying
to create an option list for a drop-down.

Let me put up my shot-in-the-dark example, then maybe someone can
correct me:

// add a single value/text option to drop-down:
OPTION(null, {'value': '123', 'text': 'some text'});

Trying to create this: option value=123some text/option
and a bunch more if everything goes well

I know that is completely wrong. This may be explained in the docs,
but I'm not seeing it. The example for building a table element is not
translating to an option. How does it know what element to use?


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[mochikit] Re: createDom option example please

[hotani]

Great, thanks Bob.


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[mochikit] Re: createDom option example please

[hotani]

And here is a real working example in all its glory:

appendChildNodes($('id'), OPTION({'value':val}, txt));

where 'val' is an id from the database and 'txt' is its description.



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[mochikit] Re: createDom option example please

[hotani]

Good to know, thanks.


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[mochikit] really basic example?

[hotani]

Up until this morning, I thought I knew my way around JavaScript.
Looking at the docs for MochiKit has proven otherwise.

All I want is a basic example of a call to a json file, and output. The
docs are shooting right over my head and I still don't get what
deferred really means. There is a 450 line beast I've been digging
through that is the 'sortable tables' example, but I was hoping for a 5
liner. You know, like get data show data. Anyone?

Maybe there is some documentation somewhere that I'm missing? Just
don't know how to start here...

So far, I have this:
var d = loadJSONDoc(/myapp/ajax_test/);
(Django is spitting out the JSON btw)


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