added bulk select

src/Form/CollectionManagerForm.php

@@ -97,8 +97,8 @@ class CollectionManagerForm extends FormBase {
     if ($all_descendants) {
       $nodes = $node_storage->loadMultiple($all_descendants);
       foreach ($nodes as $node) {
-        if ($node->hasField('field_model')) {
-          foreach ($node->get('field_model')->getValue() as $item) {
+        if ($node->hasField('field_models')) {
+          foreach ($node->get('field_models')->getValue() as $item) {
             if (!empty($item['target_id'])) {
               $available_model_tids[(int) $item['target_id']] = TRUE;
             }
@@ -172,22 +172,20 @@ class CollectionManagerForm extends FormBase {
     ];
 
     $header = [
-      'select' => $this->t('Select'),
       'title' => $this->t('Title'),
       'nid' => $this->t('Node ID'),
       'model' => $this->t('Model'),
       'status' => $this->t('Status'),
     ];
-    $rows = [];
+    $options = [];
     foreach ($page_nodes as $nid => $node) {
       $models = [];
-      if ($node->hasField('field_model')) {
-        foreach ($node->get('field_model')->referencedEntities() as $term) {
+      if ($node->hasField('field_models')) {
+        foreach ($node->get('field_models')->referencedEntities() as $term) {
           $models[] = $term->label();
         }
       }
-      $rows[$nid] = [
-        'select' => ['data' => ['#type' => 'checkbox', '#name' => 'selected[' . $nid . ']', '#return_value' => $nid]],
+      $options[$nid] = [
         'title' => ['data' => $node->toLink($node->label())->toRenderable()],
         'nid' => $nid,
         'model' => implode(', ', $models),
@@ -195,10 +193,13 @@ class CollectionManagerForm extends FormBase {
       ];
     }
 
+    // Use Drupal's tableselect element so the header includes the standard
+    // select-all checkbox. It selects/deselects all rows on the current page.
     $form['results'] = [
-      '#type' => 'table',
+      '#type' => 'tableselect',
       '#header' => $header,
-      '#rows' => $rows,
+      '#options' => $options,
+      '#multiple' => TRUE,
       '#empty' => $this->t('No descendants match the selected model filter.'),
     ];
     $form['pager'] = ['#type' => 'pager'];
@@ -268,7 +269,7 @@ class CollectionManagerForm extends FormBase {
     }
 
     $action_id = (string) $form_state->getValue(['bulk', 'action']);
-    $selected = array_keys(array_filter((array) $form_state->getValue('selected', [])));
+    $selected = array_values(array_filter((array) $form_state->getValue('results', [])));
     if (!$action_id || !$selected) {
       $this->messenger()->addWarning($this->t('Select at least one result and an action.'));
       return;