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Xpath & getChildren

JoeS

I'm trying to validate a DCR with replicants to make sure that certain values in the drop-down menus are only selected once. I have the following code that loops through the xml, but it only picks up the item path (i.e. /global_calendar_event[1]/event_type[1]) not the actual value of the item. Thanks in advance for any guidance.

[PHP]

function init() {
checkAllLinks("/global_calendar_event/");
}

function checkAllLinks(Xpath)
{
alert ("got "+Xpath);
var children = IWDatacapture.getItem(Xpath).getChildren();
if (children == null) { return; }
for (var i = 0; i < children.length; i++)
{
checkAllLinks(children.getName());
}
return true;
}

[/PHP]

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Comments

nipper

I am confused.

You have the xpath, so if there are no children. use [color=#0000bb]IWDatacapture.getItem(Xpath.getValue()[/color]

JoeS

Nipper,
Actually I saw this code block in one of your previous postings. I've tried switching the getChildren with getValue, but it comes up as null. I'm trying to pull in the value from the drop-down item /global_calendar_event/event_type from all the replicants in the DCR. Then I'd like to display an alert to the end-user if the certain value has already been selected in one of the other replicants. I also have the following code that checks the value in the selection, but doesn't compare it to the other replicants.

[PHP]
function registerEventHandlers() {

// event handler for event type drop-down
IWEventRegistry.addItemHandler("/global_calendar_event/event_type", "onItemChange", EventDropdown);

function EventDropdown (item) {

var selection = item.getValue();
if (selection == null) {
alert("Please fill in a value");
return false;
}

if (selection == 0) {
alert("Please only select one Featured Upcoming Event!");
return false;
}

if (selection == 1) {
alert("Please only select one Featured Prior Event!");
return false;
}

return true;
}
}

[/PHP]

Migrateduser

Wouldn't you need to use

[PHP]

IWEventRegistry.addItemHandler("/global_calendar_event[1]/event_type",
"onItemChange", EventDropdown);

IWEventRegistry.addItemHandler("/global_calendar_event[2]/event_type", "onItemChange", EventDropdown);

IWEventRegistry.addItemHandler("/global_calendar_event[3]/event_type", "onItemChange", EventDropdown);

and so on and so on...

[/PHP]

or better yet

[PHP]
var maxReplicantSize= 30;

for( var i = 1 ; i <= maxReplicantSize; i++ ){
IWEventRegistry.addItemHandler("/global_calendar_event["+i+"]/event_type", "onItemChange", EventDropdown);
}
[/PHP]

nipper

I thought that code looked familiar and was wondering if you inherited one of my old projects. It was really meant for replicants that could be anywhere in the form. If this is for a certain section only you may use something different.

That being said, in this line:

[color=#007700]
if (children == null) { return; }

make it:

[/color]

[color=#007700]
if (children == null) { alert(Xpath); [/color]

[color=#0000bb]EventDropdown([/color][color=#0000bb]IWDatacapture.getItem(Xpath)[/color]

[color=#007700]}



Now that will run EventDropdown on all items in your DCT, so you will want to make certain you restrict the actions. 
[/color]

Adam Stoller

Nipper,
Actually I saw this code block in one of your previous postings. I've tried switching the getChildren with getValue, but it comes up as null. I'm trying to pull in the value from the drop-down item /global_calendar_event/event_type from all the replicants in the DCR. Then I'd like to display an alert to the end-user if the certain value has already been selected in one of the other replicants. I also have the following code that checks the value in the selection, but doesn't compare it to the other replicants.

If I understand what you're asking correctly, I think you want something like this:

var event_types_seen = new Array();
function init() {
    checkAllLinks("/global_calendar_event/");
}
function checkAllLinks(Xpath) {
    alert ("got "+Xpath);
    var msg = "";
    var children = IWDatacapture.getItem(Xpath).getChildren();
    for (var i in children) {
        var etype = children.getChildByName("event_type").getValue();
        // If event_type is a select list, then you need to expand the above to use getOptions()[...].value
        if (typeof event_types_seen[etype] == "undefined") {
            event_types_seen[etype] = true;
        }
        else {
            msg += "Duplicate Event Type Found: " + etype + "\n";
        }
    }
    if (msg != "") {
        alert(msg);
        return false;
    }
    return true;
}

Sree1988

I think u should assign getChildren() to an array and get each child's value, how much ever it is, using getValue() using for loop.

BIRT forum question 140305.docx

adv_agen036_test_01.rptdesign

adv_agen036_entity_validation_text.pdf

JoeS

Thanks for everyone's input. This has pointed me in the right direction.