Version 1

[yaffs-website] / web / core / modules / views / src / Plugin / views / join / Subquery.php

diff --git a/web/core/modules/views/src/Plugin/views/join/Subquery.php b/web/core/modules/views/src/Plugin/views/join/Subquery.php
new file mode 100644 (file)
index 0000000..f407ffc
--- /dev/null
+++ b/web/core/modules/views/src/Plugin/views/join/Subquery.php
@@ -0,0 +1,105 @@
+<?php
+
+namespace Drupal\views\Plugin\views\join;
+
+/**
+ * Join handler for relationships that join with a subquery as the left field.
+ *
+ * For example:
+ * @code
+ * LEFT JOIN node node_term_data ON ([YOUR SUBQUERY HERE]) = node_term_data.nid
+ * @endcode
+ *
+ * Join definition: same as \Drupal\views\Plugin\views\join\JoinPluginBase,
+ * except:
+ * - left_query: The subquery to use in the left side of the join clause.
+ *
+ * @ingroup views_join_handlers
+ * @ViewsJoin("subquery")
+ */
+class Subquery extends JoinPluginBase {
+
+  /**
+   * Constructs a Subquery object.
+   */
+  public function __construct(array $configuration, $plugin_id, $plugin_definition) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition);
+
+    $this->left_query = $this->configuration['left_query'];
+  }
+
+  /**
+   * Builds the SQL for the join this object represents.
+   *
+   * @param \Drupal\Core\Database\Query\SelectInterface $select_query
+   *   The select query object.
+   * @param string $table
+   *   The base table to join.
+   * @param \Drupal\views\Plugin\views\query\QueryPluginBase $view_query
+   *   The source views query.
+   */
+  public function buildJoin($select_query, $table, $view_query) {
+    if (empty($this->configuration['table formula'])) {
+      $right_table = "{" . $this->table . "}";
+    }
+    else {
+      $right_table = $this->configuration['table formula'];
+    }
+
+    // Add our join condition, using a subquery on the left instead of a field.
+    $condition = "($this->left_query) = $table[alias].$this->field";
+    $arguments = [];
+
+    // Tack on the extra.
+    // This is just copied verbatim from the parent class, which itself has a
+    //   bug: https://www.drupal.org/node/1118100.
+    if (isset($this->extra)) {
+      if (is_array($this->extra)) {
+        $extras = [];
+        foreach ($this->extra as $info) {
+          // Figure out the table name. Remember, only use aliases provided
+          // if at all possible.
+          $join_table = '';
+          if (!array_key_exists('table', $info)) {
+            $join_table = $table['alias'] . '.';
+          }
+          elseif (isset($info['table'])) {
+            $join_table = $info['table'] . '.';
+          }
+
+          $placeholder = ':views_join_condition_' . $select_query->nextPlaceholder();
+
+          if (is_array($info['value'])) {
+            $operator = !empty($info['operator']) ? $info['operator'] : 'IN';
+            // Transform from IN() notation to = notation if just one value.
+            if (count($info['value']) == 1) {
+              $info['value'] = array_shift($info['value']);
+              $operator = $operator == 'NOT IN' ? '!=' : '=';
+            }
+          }
+          else {
+            $operator = !empty($info['operator']) ? $info['operator'] : '=';
+          }
+
+          $extras[] = "$join_table$info[field] $operator $placeholder";
+          $arguments[$placeholder] = $info['value'];
+        }
+
+        if ($extras) {
+          if (count($extras) == 1) {
+            $condition .= ' AND ' . array_shift($extras);
+          }
+          else {
+            $condition .= ' AND (' . implode(' ' . $this->extraOperator . ' ', $extras) . ')';
+          }
+        }
+      }
+      elseif ($this->extra && is_string($this->extra)) {
+        $condition .= " AND ($this->extra)";
+      }
+    }
+
+    $select_query->addJoin($this->type, $right_table, $table['alias'], $condition, $arguments);
+  }
+
+}