我需要从设置表中检索所有默认设置,但如果存在 x 字符,还需要获取字符设置。
但是此查询仅检索字符 = 1 的那些设置,而不是用户尚未设置任何人的默认设置。
SELECT `settings`.*, `character_settings`.`value` FROM (`settings`) LEFT JOIN `character_settings` ON `character_settings`.`setting_id` = `settings`.`id` WHERE `character_settings`.`character_id` = '1'
所以我应该需要这样的东西:
array( '0' => array('somekey' => 'keyname', 'value' => 'thevalue'), '1' => array('somekey2' => 'keyname2'), '2' => array('somekey3' => 'keyname3') )
其中 key 1 和 2 是 key 0 包含默认值和字符值时的默认值。
该where子句过滤掉left join不成功的行。将其移至联接:
where
left join
SELECT `settings`.*, `character_settings`.`value` FROM `settings` LEFT JOIN `character_settings` ON `character_settings`.`setting_id` = `settings`.`id` AND `character_settings`.`character_id` = '1'