Filtering lookups with esq

Hi,

I'm trying to set filters on lookups from an ESQ.

When spying on filterGroup in attribute , it's undefined.

		attributes: {
			....
			"CurrentModifiedLookupName": {
				dataValueType: this.Terrasoft.DataValueType.TEXT
			},
			"UsrStainlessSteelConnector": {
				dataValueType: this.Terrasoft.DataValueType.LOOKUP,
				lookupListConfig: {
					filter: function() {
						var filterGroup = this.getYesNoFilters("UsrStainlessSteelConnector");
						return filterGroup;
					}
				}
			}
		},

			getEsqMachineParam: function(callback) {
				var familyName = null;
				var subFamilyName = null;
				var subFamilyId = null;
 
				if(this.get("UsrMachineFamily")){
					familyName = this.get("UsrMachineFamily").displayValue;
				}
 
				if(this.get("UsrMachineSubFamily")){
					subFamilyName = this.get("UsrMachineSubFamily").displayValue;
					subFamilyId = this.get("UsrMachineSubFamily").value;
				}
 
				var fieldName = this.get("CurrentModifiedLookupName");
 
				var esq = Ext.create("Terrasoft.EntitySchemaQuery", { rootSchemaName: "UsrMachineProjectParam" });
				esq.addColumn("UsrDefaultNotAvailable");
				esq.addColumn("UsrDefaultIsIncluded");
				esq.addColumn("UsrFilterYesNo");
				esq.addColumn("Name");
				esq.filters.logicalOperation = this.Terrasoft.LogicalOperatorType.AND;
				esq.filters.add("UsrMachineSubFamily", Terrasoft.createColumnFilterWithParameter(
					Terrasoft.ComparisonType.EQUAL, "UsrMachineSubFamily", subFamilyId));
				esq.filters.add("Name", Terrasoft.createColumnFilterWithParameter(
						Terrasoft.ComparisonType.EQUAL, "Name", fieldName
					)
				);
 
				this.log2Console("fieldName=" + fieldName);
 
				esq.getEntityCollection(function(response) {
					if(callback) {
						if (response && response.success) {
							this.log2Console("response.collection=" + response.collection.count);
						}
						callback.call(this, response);
					}
				}, this);
			},
			getYesNoFilters: function(fieldName) {
				this.set("CurrentModifiedLookupName", fieldName);
				var response = null;
				Terrasoft.chain(
					function(next) {
						this.getEsqMachineParam(function(esqResult) {
							response = esqResult;
							next();
						});
					},
					function() {
						return this.onGetEsqMachineParamCompleted(response,this);
					},
					this
				);
			},
			onGetEsqMachineParamCompleted: function(response, scope) {
				if (response && response.success) {
					var item = response.collection.getByIndex(0);
					if(item.get("UsrFilterYesNo")) {
						var filterGroup = scope.Terrasoft.createFilterGroup();
						filterGroup.logicalOperation = scope.Terrasoft.LogicalOperatorType.OR;
						filterGroup.add("YesFilter", scope.Terrasoft.createColumnFilterWithParameter(
							scope.Terrasoft.ComparisonType.EQUAL,
							"Name",
							"Oui")
						);
						filterGroup.add("NoFilter", scope.Terrasoft.createColumnFilterWithParameter(
							scope.Terrasoft.ComparisonType.EQUAL,
							"Name",
							"Non")
						);
						return filterGroup;
					}
				}
			},

When spying on filterGroup in onGetEsqMachineParamCompleted method, filter is correct.

Am I doing something wrong ?