Specific filtering of lookup field (Specific filtering of lookup field (Existings))

You can create an exists filter by using something like the following. This example would get accounts where an activity exists with a particular owner.

// create the sub filter for the condition inside the exists
var subFilters = Terrasoft.createFilterGroup();
subFilters.addItem(Terrasoft.createColumnFilterWithParameter(Terrasoft.ComparisonType.EQUAL, "Owner", "a6b4ea0c-420c-45ab-81e7-6e76c8cc15f7"));
 
// now create the exists filter and pass the sub filter conditions to it
// note, this second param of subFilters is optional if all you want is the exists without sub conditions
var existsFilter = Terrasoft.createExistsFilter("[Activity:Account].Id", subFilters);
esq.filters.addItem(existsFilter);

That is the equivalent to the following:

Ryan

Ryan Farley,

I am sincerely grateful to you. With your help, other answers in the community and articles from the Academy, I learned and managed to write this complex filter. Thank you. The code currently looks like this:

attributes: {
	"UsrPlatform": {
		"dataValueType": Terrasoft.DataValueType.LOOKUP,
		"lookupListConfig": {
			"filter": function() {
				var platformFilter = this.Ext.create("Terrasoft.FilterGroup");
				var accountId = this.get("Account").value;
	
				var licenceFilter = Terrasoft.createExistsFilter(
					"[UsrLicenceClient:UsrProductLic].Id");

				licenceFilter.subFilters.addItem(
					Terrasoft.createColumnFilterWithParameter(
						Terrasoft.ComparisonType.EQUAL,
							"UsrAccount", accountId));

				var productFilter = Terrasoft.createExistsFilter(
					"[Product:UsrPlatform].Id", licenceFilter);
					platformFilter.addItem(productFilter);
				return platformFilter;
			}
		}
	}
}

I hope it helps someone and saves a lot of time.