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POStrange $.post() AJAX error when parsing JSON
 

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  1. POStrange $.post() AJAX error when parsing JSON
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    <p>I am facing this strange error in using <code>$.post</code>.</p> <p><strong>works</strong></p> <pre><code>$("#add-video").click(function(){ var url = $("#new-video-url").val(); $('#loader').show(); $.post( base_url + "forms/coach/get_url.php", { url:url, base_url:base_url }, function(data){ alert(data); $('#loader').hide(); }); }); </code></pre> <p>The above piece of code, shows me the json array I am receiving using a php file, and also shows the <code>title</code> field here, and hides the loader image.</p> <p>But when I <code>alert(data.title)</code>, it shows me undefined. More over, when I add datatype 'json' to <code>$.post</code>,</p> <p><strong>doesn't work</strong></p> <pre><code>$("#add-video").click(function(){ var url = $("#new-video-url").val(); $('#loader').show(); $.post( base_url + "forms/coach/get_url.php", { url:url, base_url:base_url }, function(data){ alert(data); $('#loader').hide(); }, "json"); //Added datatype here. }); </code></pre> <p>This neither alerts anything nor does it hide the loader image. I also tried,</p> <pre><code>$("#add-video").click(function(){ var url = $("#new-video-url").val(); $('#loader').show(); $.post( base_url + "forms/coach/get_url.php", { url:url, base_url:base_url }, function(data){ jQuery.parseJSON(data); alert(data.title); $('#loader').hide(); }); }); </code></pre> <p>The above one too neither alerts anything nor does it hide the loader. And then I tried this one too that did nothing.</p> <pre><code>$("#add-video").click(function(){ var url = $("#new-video-url").val(); $('#loader').show(); $.post( base_url + "forms/coach/get_url.php", { url:url, base_url:base_url }, function(data){ jQuery.parseJSON(data); //tried without this too. alert(data['title']); $('#loader').hide(); }); }); </code></pre> <p>The strangest thing is that I have previously used json as I have shown in the 2nd script(out of 4), and that works normally. My JS console too doesn't show any errors or warning. What am I doing wrong here? How do I access the title field of data?</p> <p>If this helps, here is how I send the json array,</p> <pre><code>$json = array("title" =&gt; $title, "embed" =&gt; $embed, "desc" =&gt; $desc, "duration" =&gt; $duration, "date" =&gt; $date); print_r(json_encode($json)); </code></pre> <p>I would really appreciate if someone can point out the error and tell me why my scripts are failing, similar functions worked in other js file.</p> <p>here is my data, that is returned by server,</p> <blockquote> <p>{"title":"Sunn Raha Hai Na Tu Aashiqui 2 Full Song With Lyrics | Aditya Roy Kapur, Shraddha Kapoor","embed":"\r\t\t\t\t\t\r\t\t\t\t\t&lt;/param>&lt;/param>\r\t\t\t\t\t&lt;/param>\r\t\t\t\t\t\r\t\t\t\t\t&lt;/embed>&lt;/object>","desc":"Presenting full song \"Sun Raha Hai Na Tu\" with lyrics from movie \"Aashiqui 2\" produced by T-Series Films &amp; Vishesh Films, starring Aditya Roy Kapur, Shraddha Kapoor in voice of Ankit Tiwari. \n\nSong: SUNN RAHA HAI\nSinger: ANKIT TIWARI\nMusic Director: ANKIT TIWARI\nAssistant Mix Engineer - MICHAEL EDWIN PILLAI\nMixed and Mastered by ERIC PILLAI (FUTURE SOUND OF BOMBAY)\nLyrics:SANDEEP NATH\nMovie: AASHIQUI 2\nProducer: BHUSHAN KUMAR KRISHAN KUAMR Producer: MUKESH BHATT<br> \nDirector: MOHIT SURI\nMusic Label: T-SERIES\n\nBuy from iTunes - https://itunes.apple.com/in/album/aashiqui-2-original-motion/id630590910?ls=1\n\nEnjoy &amp; stay connected with us!! \n\nSUBSCRIBE T-Series channel for unlimited entertainment\nhttp://www.youtube.com/tseries\n\nCircle us on G+ \nhttp://www.google.com/+tseriesmusic\n\nLike us on Facebook\nhttp://www.facebook.com/tseriesmusic\n\nFollow us\nhttp://www.twitter.com/_Tseries","duration":"391","date":"2013-04-03"}</p> </blockquote> <p><strong>Edit</strong></p> <p>This worked suddenly.. :o</p> <pre><code> $("#add-video").click(function(){ var url = $("#new-video-url").val(); $('#loader').show(); $.post( base_url + "forms/coach/get_url.php", { url:url, base_url:base_url }, function(data){ alert(data.desc); console.log(data.desc); $("#loader").hide(); }, "json"); }); </code></pre>
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    1. COAnd what shows `console.log(data)` exactly?
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    2. CO`jQuery.parseJSON(data);` doesn't modify `data` in place. You'd have to use `data = jQuery.parseJSON(data);`. That shouldn't matter, because setting the `dataType` as "json" should automatically parse it (do what you're doing already). Also, instead of using the callback of `$.post()`, just take advantage of the methods `.done()`, `.fail()` on the result of `$.post()`. For example: `$.post("url", {}).done(function (data) { }).fail(function (_, textStatus, errorThrown) { };`
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    3. COI'm pretty sure there's an error in the parsing, because your code works when you **don't** have the response parsed (meaning it's parsed as text, which has `data` being a string). That means the success callback won't execute, and instead an error callback will, which you can look at with my previous comment
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