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POHTML5 database issue while saving or selecting
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Id
7867319
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2011-10-23T16:06:49.853
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2011-10-23T20:56:52.943
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Body
<p>Spent hours but couldn't find what is the problem with the code. </p> <p>The code simply creates a table if not exits and adds the text that typed in a textbox. On every load it loads these and writes to a list.</p> <pre><code><!DOCTYPE html> <html lang="en"> <head> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.js" type="text/javascript"></script> <script type="text/javascript"> var mydb = null; function initDatabase() { try { if (!window.openDatabase) { alert('Databases are not supported in this browser.'); } else { var shortName = 'mydb'; var version = '1.0'; var displayName = 'sample db'; var maxSize = 1024*1024*2; mydb = openDatabase(shortName, version, displayName, maxSize, null); mydb.transaction( function (transaction) { transaction.executeSql('CREATE TABLE IF NOT EXISTS sampletable(term TEXT NOT NULL);', [], nullDataHandler, errorHandler); } ); loadDB(); } } catch(e) { if (e == 2) { alert("Invalid database version."); } else { alert("Unknown error "+e+"."); } return; } } function loadDB() { $(".debugger").html(""); mydb.transaction( function (t) { t.executeSql("SELECT * FROM sampletable", [],dataSelectHandler,errorHandler); } ); } function saveDB(_term) { mydb.transaction( function (transaction) { transaction.executeSql("INSERT INTO sampletable(_term) VALUES (\""+_term + "\");"); } ); } function dataSelectHandler(transaction, results){ $(".debugger").append("<li>Length: " + results.rows.length + "</li>"); for (var i=0; i<results.rows.length; i++) { var row = results.rows.item(i); addToHistoryUI(row['_term']); } } function errorHandler(transaction, error){ if (error.code==1){ alert("DB Table already exists"); } else { // Error is a human-readable string. alert('Oops. Error was '+error.message+' (Code '+error.code+')'); } return false; } function nullDataHandler(){ //alert("SQL Query Succeeded"); } function addToHistoryUI(_term) { var newH = "<li>" + _term + "</li>"; $(".addedQueries").append(newH); } $(function () { initDatabase(); }); $(document).ready(function () { $(".addBtn").click(function () { var _term = $("#query").val(); addToHistoryUI(_term); saveDB(_term); loadDB(); }); }); </script> </head> <body> <div data-role="page" id="index"> <div class="panel"> <input id="query" type="text" name="query" /> <a class="navigationLink addBtn" href="#">add</a> </div> <div class="content"> <ul class="addedQueries"> </ul> </div> <ul class="debugger"></ul> </div> </body> </html> </code></pre>
Tags
<javascript><database><html5><web-sql>
Title
HTML5 database issue while saving or selecting
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