Civi/Api4/Query/SqlField.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | Copyright CiviCRM LLC. All rights reserved.                        |
   5  |                                                                    |
   6  | This work is published under the GNU AGPLv3 license with some      |
   7  | permitted exceptions and without any warranty. For full license    |
   8  | and copyright information, see https://civicrm.org/licensing       |
   9  +--------------------------------------------------------------------+
  10  */
  11
  12 namespace Civi\Api4\Query;
  13
  14 /**
  15  * Sql column expression
  16  */
  17 class SqlField extends SqlExpression {
  18
  19   public $supportsExpansion = TRUE;
  20
  21   protected function initialize() {
  22     if ($this->alias && $this->alias !== $this->expr) {
  23       throw new \API_Exception("Aliasing field names is not allowed, only expressions can have an alias.");
  24     }
  25     $this->fields[] = $this->expr;
  26   }
  27
  28   public function render(array $fieldList): string {
  29     if (empty($fieldList[$this->expr])) {
  30       throw new \API_Exception("Invalid field '{$this->expr}'");
  31     }
  32     return $fieldList[$this->expr]['sql_name'];
  33   }
  34
  35 }