如何在drupal 8中的page.html.twig中进行db_query调用？

Question

我正在尝试从我的自定义页面树枝中调用数据库中的某些字段。 当我清除它抛出的缓存时，网站遇到意外错误。 你能否就org.apache.hadoop.mapred.YarnChild: Exception running child : java.lang.RuntimeException: Error while indexing: failure in bulk execution:MapperParsingException[failed to parse [endDate]]; nested: IllegalArgumentException[Invalid format: "253402214400000" is malformed at "02214400000" MapperParsingException[failed to parse [endDate]]; nested: IllegalArgumentException[Invalid format: "253402214400000" is malformed at "02214400000"]; MapperParsingException[failed to parse [endDate]]; nested: IllegalArgumentException[Invalid format: "253402214400000" is malformed at "02214400000"]; MapperParsingException[failed to parse [endDate]]; nested: IllegalArgumentException[Invalid format: "253402214400000" is malformed at "02214400000"]; MapperParsingException[failed to parse [endDate]]; nested: IllegalArgumentException[Invalid format: "253402214400000" is malformed at "02214400000"]; MapperParsingException[failed to parse [endDate]]; nested: IllegalArgumentException[Invalid format: "253402214400000" is malformed at "02214400000"]; 8？

的提示做出任何提示

Answer 1

twig模板不支持直接的php代码，首先你需要hook_page_preprocess（）并在你的模板上实现它，你可以检查https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Render!theme.api.php/group/themeable/8.2.x 感谢