drupal-7 - 如何在多个条件下使用 db_delete？

Question

我正在尝试执行类似“DELETE FROM ac_journal_term WHERE jid = $jid AND tid = $tid”的查询；

foreach ($form_state["values"]["existing_tags"] as $tid)
{
  db_delete('ac_journal_term') 
  ->condition('jid', $jid)->condition('tid', $tid)
  ->execute();
}

我认为这不是正确的方法，但我在网上找不到关于如何使用 db_delete 执行多个条件的示例。

Answer 1

db_delete 遵循通常的条件约定。

foreach ($form_state["values"]["existing_tags"] as $tid)
{
  $and = db_and()->condition('jid', $jid)->condition('tid', $tid);
  db_delete('ac_journal_term') 
  ->condition($and)
  ->execute();
}

请参阅此处的条件子句文档：

https://drupal.org/node/310086

Answer 2

这是 block.module 中的一个示例：

/**
 * Implements hook_menu_delete().
 */
function block_menu_delete($menu) {
  db_delete('block')
    ->condition('module', 'menu')
    ->condition('delta', $menu['menu_name'])
    ->execute();
  db_delete('block_role')
    ->condition('module', 'menu')
    ->condition('delta', $menu['menu_name'])
    ->execute();
}

Answer 3

Drupal 的做法是——

db_delete('ac_journal_term') ->condition('jid', $jid) ->condition('tid', $tid) ->execute();

Answer 4

<?php
  foreach ($form_state["values"]["existing_tags"] as $tid){
    $and = db_and()->condition('jid', $jid)->condition('tid', $tid);
    db_delete('ac_journal_term')->condition($and)->execute();  
  }
    // Above translates to:
   DELETE FROM {ac_journal_term}  WHERE ( (jid = $jid) AND (tid = $tid) )
?>

如果您需要更多详细信息，请参阅以下链接。 关联