Converting GET into POST in JS

Question

Working with Datatables. Trying to get work function (which currently works ONLY with GET) with POST.

Based on this discussion I modified this function and got something like below. Now getting error message:

json.aaData is undefined @ line 99

        jQuery.post( sSource, aoData, function (data) { 
            /* Callback processing */
            oCache.lastJson = jQuery.extend(true, {}, data);

            if ( oCache.iCacheLower != oCache.iDisplayStart )
            {
                data.aaData.splice( 0, oCache.iDisplayStart-oCache.iCacheLower );
            }
            data.aaData.splice( oCache.iDisplayLength, data.aaData.length );

            fnCallback(data)
        },"json" );
    }
    else
    {
        json = jQuery.extend(true, {}, oCache.lastJson);
        json.sEcho = sEcho; /* Update the echo for each response */
        json.aaData.splice( 0, iRequestStart-oCache.iCacheLower ); // <- this line
        json.aaData.splice( iRequestLength, json.aaData.length );
        fnCallback(json);
        return;
    }
}

What am I missing? Any suggestion?

Try providing more details, or localising the problem, so more people will try to answer. — Luka Ramishvili
– Luka Ramishvili, Commented May 13, 2012 at 19:15
@LukaRamishvili I really don't know, what's problem. I provided info, that I know — heron
– heron, Commented May 13, 2012 at 19:16
@LukaRamishvili But, I have suggestion that, It's something related with variable names. — heron
– heron, Commented May 13, 2012 at 19:16
Did you know that you only have to write jQuery in its long form once? By wrapping your code in (function($) { .... })(jQuery);, you can use $ no matter if noConflict has been used or not. — ThiefMaster
– ThiefMaster, Commented May 13, 2012 at 19:19
@ThiefMaster It's not my code. Please take a look at links that I provided — heron
– heron, Commented May 13, 2012 at 19:21

Luka Ramishvili · Accepted Answer · 2012-05-13 19:23:03Z

1

It's jQuery.post( sSource, aoData, function (data) {. You have aoData, but in the code you reference aaData. It may be a typo.

answered May 13, 2012 at 19:23

Luka Ramishvili

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4 Comments

heron Over a year ago

Now, json.aoData is undefined @ line 99

heron Over a year ago

Guys, I found error: PHP returns value with 1-2 second delay jQuery.post doesn't wait for response, I think. How do you think, is it possible to fix that problem?

Luka Ramishvili Over a year ago

$.ajax({...type: "POST", response:function(data){/*do something with data*/}...});

heron Over a year ago

I resolved this problem already. Can you pls take a look at this problem? stackoverflow.com/questions/10612904/…

Jesse Earle · Accepted Answer · 2012-05-13 19:25:40Z

0

So the full code sample you provided, couldn't possibly be the full code, because it's only 75 lines long, and you are getting an error that says you have an undefined property on line 99.

However, you did say that this line:

json.aaData.splice( 0, iRequestStart-oCache.iCacheLower );

is giving you the undefined error. What's happening is you are trying to access the splice function of a property aaData which does not exist on your json object for some reason.

So if you open up your JavaScript console and type json.aaData, you will see that it returns undefined. So whatever is supposed to set the aaData property of the json variable is not doing so. I hope this helps you track down your error.

answered May 13, 2012 at 19:25

Jesse Earle

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4 Comments

Jesse Earle Over a year ago

Ok so based on your screen cast it looks like the JSON object you're getting from question.php is returning with a property called aaData. I would suggest clicking on the tab "Script" to the right of Console. And where it says "Inline" click that and look for the file that contains your script. Next scroll down to the line number that the aaData property is being access and click the green line number. You should see a little red dot appear next to the number. That's setting a breakpoint. Now look on the right for your json variable and see if aaData is set.

heron Over a year ago

Is undefined. Please take a look at original version of script datatables.net/release-datatables/examples/server_side/… lines 80-91 I changed to Post. I think something goes wrong because of this

heron Over a year ago

Guys, I found error: PHP returns value with 1-2 second delay jQuery.post doesn't wait for response, I think. How do you think, is it possible to fix that problem?

Jesse Earle Over a year ago

Hey, so you could setup an interval function to keep asking for it until it either gets it or timesout: var secondsCounted = 0; var interval = setInterval(function(){ if ( json.aaData ) { //do what you need to do and clear interval //...do stuff clearInterval(interval); } else { if (secondsCounted == 10) { console.log('json.aaData not found due to timeout'); clearInterval(interval); return; } secondsCounted++; } },1000);

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