Merge PR #5 from official repository

Author: ReplicaObscura

views_selective_filters.views_execution.inc

@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * @file
+ * View execution hooks for views_selective_filters.
+ */
+
+use Drupal\views\ViewExecutable;
+use Drupal\views\Plugin\views\query\QueryPluginBase;
+
+/**
+ * Implements hook_views_query_alter().
+ *
+ * Since this filter plugin screws up entity reference fields, find any filter
+ * submission that ends with _target_id_selective and fix query conditions.
+ *
+ * From: 'node__field_some_entity_reference.field_some_entity_reference'
+ * To: 'node__field_some_entity_reference.field_some_entity_reference_target_id'
+ */
+function views_selective_filters_views_query_alter(ViewExecutable $view, QueryPluginBase $query) {
+  $field_suffix = '_selective';
+  $missing = '_target_id';
+  $uses_selective_filters = FALSE;
+  $replacement_map = [];
+  foreach ($view->filter as $filter_name => $filter) {
+    if (preg_match("/${missing}${field_suffix}$/", $filter_name) === 1) {
+      $uses_selective_filters = TRUE;
+      $replace_with = preg_replace("/${field_suffix}$/", '', $filter_name);
+      $look_for = preg_replace("/${missing}$/", '', $replace_with);
+      $replacement_map[$look_for] = $replace_with;
+    }
+  }
+
+  if ($uses_selective_filters) {
+    foreach ($query->where as &$condition_group) {
+      foreach ($condition_group['conditions'] as &$condition) {
+        $exploded = explode('.', $condition['field']);
+        $search_key = array_pop($exploded);
+        if (isset($replacement_map[$search_key])) {
+          $condition['field'] = preg_replace("/.${search_key}$/", '.' . $replacement_map[$search_key], $condition['field']);
+        }
+      }
+    }
+  }
+}