Sample code for populating a CUI dropdown in Aras Innovator with a list of all of the generations of the current item

labs_dropdown_init.js

// This is to account for the case where this dropdown accidentally gets added to a non-versionable item
const isVersionableItemType = options.itemType['is_versionable'] === '1';
if (!isVersionableItemType) {
	return { hidden: true };
}

/* Query for the IDs of all generations */
// Need the config ID to get all generations
// TODO: We could skip this step if we can get the config_id from the window, but it's not readily available
var configIdQuery = aras.IomInnovator.newItem(options.itemTypeName, "get");
configIdQuery.setID(options.itemId);
configIdQuery.setAttribute("select", "generation,config_id");
configIdQuery = configIdQuery.apply();
// Validate that this isn't a new item
var generationDropdown = control.data.get("labs.part.ivcb.version_selector.dropdown") || {};
var generationButton = control.data.get("labs.part.ivcb.version_selector.open_version.button") || {};
if (configIdQuery.isEmpty())
{
    // This is likely a new item, so disable the functionality since it's useless unless there's multiple generations
    generationDropdown.disabled = true;
    generationButton.disabled = true;
    return {
        value: '',
        options: []
    };
}
else
{
    // Handle the case where a new generation was created while the tab was open
    generationDropdown.disabled = false;
    generationButton.disabled = false;
}

var configId = configIdQuery.getProperty("config_id");

// Query for all older generations and their IDs
var allGensQuery = aras.IomInnovator.newItem(options.itemTypeName, "get");
allGensQuery.setAttribute("select", "generation,id");
allGensQuery.setAttribute("orderBy", "generation desc");
allGensQuery.setProperty("config_id", configId);
allGensQuery.setProperty("generation", "1");
allGensQuery.setPropertyAttribute("generation", "condition", "ge");
allGensQuery = allGensQuery.apply();

var allGenerations = [];
var currGenId;
for (var i = 0, numGens = allGensQuery.getItemCount(); i < numGens; i++)
{
    var singleGeneration = allGensQuery.getItemByIndex(i);
    var thisGenId = singleGeneration.getID();
    var thisGenLabel = singleGeneration.getProperty("generation");
    if (thisGenId == options.itemId)
    {
        // This is the current generation, so let's call it out
        currGenId = thisGenId;
        thisGenLabel += " (Viewing)";
    }
    else if (i == 0)
    {
        thisGenLabel += " (Current)";
    }
    allGenerations.push({
        value: thisGenId,
        label: thisGenLabel
    })
}
return {
    // The initial value of this item
    value: currGenId,
    // An array of objects containing a value and label
    options: allGenerations
}