make input name to be a function

app/assets/javascripts/gl_dropdown.js

@@ -470,7 +470,8 @@
       } else {
         if (!selected) {
           value = this.options.id ? this.options.id(data) : data.id;
-          fieldName = this.options.fieldName;
+          fieldName = _.isFunction(this.options.fieldName) ? this.options.fieldName() : this.options.fieldName;
+
           field = this.dropdown.parent().find("input[name='" + fieldName + "'][value='" + value + "']");
           if (field.length) {
             selected = true;
@@ -533,7 +534,6 @@
 
     GitLabDropdown.prototype.rowClicked = function(el) {
       var field, fieldName, groupName, isInput, selectedIndex, selectedObject, value;
-      fieldName = this.options.fieldName;
       isInput = $(this.el).is('input');
       if (this.renderedData) {
         groupName = el.data('group');
@@ -545,6 +545,7 @@
           selectedObject = this.renderedData[selectedIndex];
         }
       }
+      fieldName = _.isFunction(this.options.fieldName) ? this.options.fieldName(selectedObject) : this.options.fieldName;
       value = this.options.id ? this.options.id(selectedObject, el) : selectedObject.id;
       if (isInput) {
         field = $(this.el);
@@ -559,10 +560,9 @@
           field.remove();
         }
         if (this.options.toggleLabel) {
-          return this.updateLabel(selectedObject, el, this);
-        } else {
-          return selectedObject;
+          this.updateLabel(selectedObject, el, this);
         }
+        return selectedObject;
       } else if (el.hasClass(INDETERMINATE_CLASS)) {
         el.addClass(ACTIVE_CLASS);
         el.removeClass(INDETERMINATE_CLASS);
@@ -570,7 +570,7 @@
           field.remove();
         }
         if (!field.length && fieldName) {
-          this.addInput(fieldName, value);
+          this.addInput(fieldName, value, selectedObject);
         }
         return selectedObject;
       } else {
@@ -589,7 +589,7 @@
         }
         if (value != null) {
           if (!field.length && fieldName) {
-            this.addInput(fieldName, value);
+            this.addInput(fieldName, value, selectedObject);
           } else {
             field.val(value).trigger('change');
           }
@@ -598,12 +598,15 @@
       }
     };
 
-    GitLabDropdown.prototype.addInput = function(fieldName, value) {
+    GitLabDropdown.prototype.addInput = function(fieldName, value, selectedObject) {
       var $input;
       $input = $('<input>').attr('type', 'hidden').attr('name', fieldName).val(value);
       if (this.options.inputId != null) {
         $input.attr('id', this.options.inputId);
       }
+      if (selectedObject.type) {
+        $input.attr('data-type', selectedObject.type);
+      }
       return this.dropdown.before($input);
     };