alternative solution for issue #7627

should cover more cases then #8912. Have not tested it yet.

see #7627

framework/widgets/ActiveField.php

@@ -143,6 +143,12 @@ class ActiveField extends Component
      */
     public $parts = [];
 
+    /**
+     * @var string this property holds a custom input id if it was set using [[inputOptions]] or in one of the
+     * `$options` parameters of the `input*` methods.
+     */
+    private $_inputId;
+
 
     /**
      * PHP magic method that returns the string representation of this object.
@@ -169,11 +175,11 @@ class ActiveField extends Component
      * and use them as the content.
      * If a callable, it will be called to generate the content. The signature of the callable should be:
      *
-     * ~~~
+     * ```php
      * function ($field) {
      *     return $html;
      * }
-     * ~~~
+     * ```
      *
      * @return string the rendering result
      */
@@ -213,7 +219,7 @@ class ActiveField extends Component
             }
         }
 
-        $inputID = Html::getInputId($this->model, $this->attribute);
+        $inputID = $this->getInputId();
         $attribute = Html::getAttributeName($this->attribute);
         $options = $this->options;
         $class = isset($options['class']) ? [$options['class']] : [];
@@ -673,7 +679,11 @@ class ActiveField extends Component
      */
     protected function adjustLabelFor($options)
     {
-        if (isset($options['id']) && !isset($this->labelOptions['for'])) {
+        if (!isset($options['id'])) {
+            return;
+        }
+        $this->_inputId = $options['id'];
+        if (!isset($this->labelOptions['for'])) {
             $this->labelOptions['for'] = $options['id'];
         }
     }
@@ -712,7 +722,7 @@ class ActiveField extends Component
 
         $options = [];
 
-        $inputID = Html::getInputId($this->model, $this->attribute);
+        $inputID = $this->getInputId();
         $options['id'] = $inputID;
         $options['name'] = $this->attribute;
 
@@ -748,4 +758,14 @@ class ActiveField extends Component
             'error' => '.help-block',
         ]);
     }
+
+    /**
+     * Returns the HTML `id` of the input element of this form field.
+     * @return string the input id.
+     * @since 2.0.6
+     */
+    protected function getInputId()
+    {
+        return $this->_inputId ?: Html::getInputId($this->model, $this->attribute);
+    }
 }