[jQuery] Re: Using jQuery to access jSON object

Thank you for a very clear reply. I'm stuck doing other work today, but I
will modify my code as you suggest asap.

Yerfdoggy

Michael Geary-3 wrote:
>
>
> You're trying to use the return value from $.getJSON, but that is not
> where
> your data is returned. $.getJSON is asynchronous. That is, it returns
> immediately as soon as the request is sent to the server (or even before
> that). The return value from $.getJSON (for a same-site request, not a
> cross-domain request) is the XMLHttpRequest object. That's why you see
> things like onreadystatechange in that object.
>
> Instead, you need to provide a callback function. That function will be
> called when your data is ready, with the data passed as an argument to the
> function:
>
> $.getJSON(
> 'ajax/set_usr_fields.php',
> { ety_id:etyId },
> function( data ) {
> console.log( data );
> }
> );
>
> -Mike
>
>> From: yerfdoggy
>>
>> I'm a jQuery/jSON newby. I'm using jQuery getJSON() to do an
>> AJAX request on a separate PHP script, then I want to use the
>> returned jSON object data to update some form fields. I'm
>> sure this is very basic and common, but I've been reading
>> doco. for days and can't get it to work.
>>
>> Here's the local AJAX request - it's sending a local variable
>> to the PHP script and it has no callback function:
>>
>> var objJson = $.getJSON('ajax/set_usr_fields.php', {ety_id:etyId});
>>
>> Here is what is returned from the PHP script, according to
>> the Firebug console, it's what I intended (I've pasted this
>> into a jSON validator and it is valid jSON):
>>
>> {"fields":{"ETY_ID":"2","ETY_NM":"A-001","DISPL_NM":"Sammys","
>> LONG_DESC":"Some
>> text
>> here","C_CODE":"61","A_CODE":"5","PHONE":"778908","FAX":"","AD
>> DRESS1":"11
>> Ward Park
>> Drive","CITY":"Somerton","STATE":"VIC","POSTCODE":"3912","CTRY
>> _NM":"Australia","CTRY_CODE":"AU",
>> "PLIST":"default","TERRITORY":"Mornington
>> Peninsula","CONSULTANT":"galbraid"}}
>>
>> I've added the following line to the local javascript to have
>> a look at what's returned (I understand it should be a jSON
>> object, since I used
>> getJSON() ):
>>
>> console.debug(objJson);
>>
>> And here is what the Firebug console shows (sorry, the
>> formatting didn't work too well):
>>
>> channel [xpconnect wrapped nsIChannel]
>> multipart false
>> onerror null
>> onload null
>> onprogress null
>> onreadystatechange null
>> readyState 4
>> responseText
>> "{"fields":{"ETY_ID":"2","ETY_NM":"A-001","DISPL_NM":"Sealite"
>> ,"LONG_DESC":"The
>> big Kahuna!","C_CODE"..."
>> responseXML null
>> status 200
>> statusText "OK"
>> abort abort()
>> addEventListener addEventListener()
>> dispatchEvent dispatchEvent()
>> getAllResponseHeaders getAllResponseHeaders()
>> getInterface getInterface()
>> getResponseHeader getResponseHeader()
>> open function()
>> overrideMimeType overrideMimeType()
>> removeEventListener removeEventListener()
>> send send()
>> setRequestHeader setRequestHeader()
>>
>> So far, not so good. I expected the jSON string to be
>> converted to an object I could access with dot notation
>> (again, because I used getJSON()). In fact, I can't even
>> access the simple jSON string, as I tried this:
>>
>> console.log(objJson.responseText);
>>
>> I get "undefined"
>>
>> I've been stuck on this for days, can anyone point out what
>> I'm not understanding, please?
>> --
>> View this message in context:
>> http://www.nabble.com/Using-jQuery-to-access-jSON-object-tp211
> 87201s27240p21187201.html
>> Sent from the jQuery General Discussion mailing list archive
>> at Nabble.com.
>>
>
>
>

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