replace the widget placeholder in all nested options

Author: Eugene Tupikov

src/components/BaseColumn.php

@@ -18,6 +18,7 @@
 use yii\helpers\ArrayHelper;
 use yii\helpers\Html;
 use yii\helpers\Inflector;
+use yii\helpers\Json;
 use unclead\multipleinput\renderers\BaseRenderer;
 
 /**
@@ -317,6 +318,18 @@ public function renderInput($name, $options, $contextParams = [])
         $options = ArrayHelper::merge($options, $optionsExt);
         $method = 'render' . Inflector::camelize($this->type);
 
+        // @see https://github.com/unclead/yii2-multiple-input/issues/261
+        // we have to replace placeholder in all nested options and the best way to do it is:
+        // 1) encode the options to a json string
+        // 2) replace the placeholder
+        // 3) decode the json string back to array
+        // But we have to leave the placeholder in case of processing a row template
+        if ($contextParams['index'] !== null) {
+            $options_string = Json::encode($options);
+            $options_string = str_replace('{' . $contextParams['indexPlaceholder'] . '}', $contextParams['index'], $options_string);
+            $options = Json::decode($options_string);
+        }
+
         $value = null;
         if ($this->type !== self::TYPE_DRAGCOLUMN) {
             $value = $this->prepareValue($contextParams);

src/renderers/TableRenderer.php

@@ -281,6 +281,7 @@ public function renderCellContent($column, $index, $columnIndex = null)
         if (substr($id, -4) === 'drag') {
             $options = ArrayHelper::merge($options, ['class' => $this->iconMap['drag-handle']]);
         }
+
         $input = $column->renderInput($name, $options, [
             'id' => $id,
             'name' => $name,