diff --git a/front/core/components/drop-down/index.js b/front/core/components/drop-down/index.js
index 9f2dfe424..ed7de7179 100644
--- a/front/core/components/drop-down/index.js
+++ b/front/core/components/drop-down/index.js
@@ -29,13 +29,16 @@ export default class DropDown extends Popover {
     }
 
     set search(value) {
-        let oldValue = this._search;
+        function nullify(value) {
+            return value == '' || value == undefined ? null : value;
+        }
+
+        let oldValue = nullify(this._search);
         this._search = value;
 
         if (!this.shown) return;
 
-        value = value == '' || value == null ? null : value;
-        oldValue = oldValue == '' || oldValue == null ? null : oldValue;
+        value = nullify(value);
         if (value === oldValue && this.modelData != null) return;
 
         if (value != null)
@@ -45,7 +48,8 @@ export default class DropDown extends Popover {
 
         if (this.model) {
             this.model.clear();
-            if (!this.data) {
+
+            if (this.model instanceof CrudModel) {
                 this.searchTimeout = this.$timeout(() => {
                     this.refreshModel();
                     this.searchTimeout = null;
@@ -353,6 +357,7 @@ export default class DropDown extends Popover {
     set model(value) {
         this.linkEvents({_model: value}, {dataChange: this.onDataChange});
         this.onDataChange();
+        this.search = this.search;
     }
 
     get url() {
@@ -362,10 +367,9 @@ export default class DropDown extends Popover {
     set url(value) {
         this._url = value;
         if (value) {
-            this.model = new CrudModel(this.$q, this.$http);
-            this.model.autoLoad = false;
-            this.model.url = value;
-            this.model.$onInit();
+            let model = new CrudModel(this.$q, this.$http);
+            model.url = value;
+            this.initModel(model);
         }
     }
 
@@ -376,13 +380,18 @@ export default class DropDown extends Popover {
     set data(value) {
         this._data = value;
         if (value) {
-            this.model = new ArrayModel(this.$q, this.$filter);
-            this.model.autoLoad = false;
-            this.model.orgData = value;
-            this.model.$onInit();
+            let model = new ArrayModel(this.$q, this.$filter);
+            model.orgData = value;
+            this.initModel(model);
         }
     }
 
+    initModel(model) {
+        model.autoLoad = false;
+        model.$onInit();
+        this.model = model;
+    }
+
     refreshModel() {
         let model = this.model;