Developing Mobile…Force.com and Sencha-Part 2, Step 8: Adjusting the Model and Adding a Data Proxy - Validation Stub 1

onSaveLeadCommand.validation1

onSaveLeadCommand: function () {

    console.log("onSaveLeadCommand");...

    //Check for validation errors.    
    var errors = currentLead.validate();
    if (!errors.isValid()) {
        var msg = '';
        errors.each(function (error) {
            msg += error.getMessage() + '<br/>';
        });
        console.log('Errors: ' + msg);
        Ext.Msg.alert('Please correct errors!', msg, Ext.emptyFn);
        currentLead.reject();
        return;
    }...