Question

With say 5 fields in the DB, I know the columns that can be queried and use:

function getDetails_success (tx, results) {
    var len = results.rows.length;

    for (var i=0; i<len; i++) {

        var content = results.rows.item(i);
        buf += '<tr '+ content.key1+'>';
        buf += '<tr '+ content.key2+'>';
    }
}

and so on.

What if I have 50 fields, of which 5 random fields has to be displayed. Do I get the keys from the resultset? What are the various ways I can approach this?

Answer 1

If 5 random fields are selected by the user to be displayed, put all of them in an array.

var randomFieldsSelected = new Array();
randomFieldsSelected.push(selection1);
randomFieldsSelected.push(selection2); //and so on

Instead of the above for loop, put,

for (var i=0; i<len; i++) {

    var content = results.rows.item(i);
    buf += '<tr '+ content[randomFieldsSelected[i]]+'>';
}

(The above works,provided, the database column names match with ‘selection1’ and ‘selection2’ etc)