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这是数据库结构，使用红豆 php 生成：

CREATE TABLE `attrib` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `type` tinyint(3) unsigned DEFAULT NULL,
  `value` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=10 ;

CREATE TABLE `attrib_photo` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `attrib_id` int(11) unsigned DEFAULT NULL,
  `photo_id` int(11) unsigned DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `UQ_e472845bf988796e2d3eceb91e2745b95f3aa534` (`attrib_id`,`photo_id`),
  KEY `index_for_attrib_photo_attrib_id` (`attrib_id`),
  KEY `index_for_attrib_photo_photo_id` (`photo_id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=19 ;


CREATE TABLE `photo` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `filepath` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
  `date` set('1') COLLATE utf8_unicode_ci DEFAULT NULL,
  `iscolored` tinyint(3) unsigned DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=4 ;


ALTER TABLE `attrib_photo`
  ADD CONSTRAINT `attrib_photo_ibfk_1` FOREIGN KEY (`attrib_id`) REFERENCES `attrib` (`id`) ON DELETE CASCADE,
  ADD CONSTRAINT `attrib_photo_ibfk_2` FOREIGN KEY (`photo_id`) REFERENCES `photo` (`id`) ON DELETE CASCADE;

我正在手动构建查询：

    output of R::debug(); R::getAll($sql);
        select filepath 
        from photo 
        inner join attrib as attrib4 on attrib4.type = 4 and attrib4.value in ("Dmitry") 
        inner join attrib_photo as attrib_photo4 on attrib_photo4.attrib_id = attrib4.id and attrib_photo4.photo_id = photo.id WHERE 1=1 LIMIT 0,25

Array ( ) 
 resultset: 0 rows
 []

结果集是空的，但基础包含记录，这些记录符合要求，并且在 phpMyAdmin 中手动运行 sql 会显示它们。

查询有什么问题，我可以处理任何其他调试信息来解决问题吗？谢谢。

更新： 缺少一点细节，在原始查询中，我使用 unicode 字符串进行照片属性搜索。经过一番调查，我发现 php 代码可以正常工作，并且在 mysql 端发生了错误的编码转换。决定将整个数据库的排序规则更改为 utf8_unicode_ci。感谢您的关注，对于遗漏相关信息深表歉意。

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