Phonegap / Cordova WebSql事务未触发

Question

I'm using cordova's latest version (3.5) and I want to save some data using WebSQL but when I call database.transaction(query,success,error) it does nothing. Both my sucess method and error method have alert() to notify error or success but none of them fire.

Here's my code:

    function onDeviceReady(){
        var db = window.openDatabase("Database", 1, "PhoneGap Demo");
        db.transaction(populateDB, errorCB, successCB);
    }

    function populateDB(tx) {
        tx.executeSql('DROP TABLE IF EXISTS DEMO');
        tx.executeSql('CREATE TABLE IF NOT EXISTS DEMO (id unique, data)');
        tx.executeSql('INSERT INTO DEMO (id, data) VALUES (1, "First row")');
        tx.executeSql('INSERT INTO DEMO (id, data) VALUES (2, "Second row")');
    }

    function errorCB(err) {
        alert("Error processing SQL: "+err.code);
    }

    function successCB() {
        alert("success!");
    }

As I said the alert boxes are not being displayed. What could be the problem? For more information: I'm using Cordova 3.5 and being tested on an iPhone simulator. I executed the code on chrome with my laptop and seems to work.

Answer 1

Environment : cordova 3.4
device : Emulator ( Nexus 7)
OS : Android KitKat 4.4
I just checked your code and got the error "Insufficient Number of arguments" on line

var db = window.openDatabase("Database", 1, "PhoneGap Demo");

As per the API doc there should be four arguments, I changed the code to

var db = window.openDatabase("Database", "1.0", "PhoneGap Demo", 1000);

and it worked. The last argument is the initial size of the database in bytes.

Hope the above solution works for iPhone as well.

I used console.log() call as well as alert() for debugging.