Question

我一直在浪费太多时间来解决与Phalcon/Paginator QueryBuilder一起用于特定查询的问题。查询工作正常，直到我尝试添加分页器，似乎分页器打破了查询。看到Phalcon中内置了一个分页器，我在整个项目中都使用过它，通过创建一个单独的自定义分页系统来解决这个问题似乎是错误的！所以我想让它发挥作用。

这是建设者;

$_ads = $this->modelsManager->createBuilder()
    ->columns($dist . ' AS distance, classifieds_ads.id AS id, classifieds_ads.title AS title, classifieds_ads.description AS description, classifieds_ads.city AS city, classifieds_ads.country AS country, classifieds_ads.latitude AS latitude, classifieds_ads.longitude AS longitude, classifieds_images.file AS image')
    ->addFrom('\Baseapp\Models\ClassifiedsAds', 'classifieds_ads')
    ->leftJoin('\Baseapp\Models\ClassifiedsImages', "classifieds_images.ad_id = classifieds_ads.id", 'classifieds_images')
    ->where($where)
    ->groupBy('classifieds_ads.id')
    ->having($having)
    ->orderBy($order);

以下是没有分页器生成的查询的示例;

SELECT (3959 * acos(cos(radians(****)) * cos(radians(`classifieds_ads`.`latitude`)) * cos(radians(`classifieds_ads`.`longitude`) - radians(****)) + sin(radians(****)) * sin(radians(`classifieds_ads`.`latitude`)))) AS `distance`, `classifieds_ads`.`id` AS `id`, `classifieds_ads`.`title` AS `title`, `classifieds_ads`.`description` AS `description`, `classifieds_ads`.`city` AS `city`, `classifieds_ads`.`country` AS `country`, `classifieds_ads`.`latitude` AS `latitude`, `classifieds_ads`.`longitude` AS `longitude`, `classifieds_images`.`file` AS `image` 
FROM `classifieds_ads` AS `classifieds_ads`  
LEFT JOIN `classifieds_images` AS `classifieds_images` ON `classifieds_images`.`ad_id` = `classifieds_ads`.`id` 
WHERE `classifieds_ads`.`status` = 'active' AND (`title` LIKE '%query%' OR `description` LIKE '%query%' OR `classifieds_ads`.`tags` LIKE '%query%') 
GROUP BY `id` 
HAVING `distance` <= 200 
ORDER BY IF(`title` LIKE '%query%', 1, IF(`classifieds_ads`.`tags` LIKE '%query%', 2, IF(`description` LIKE '%query%', 3, 4)))

这可以按预期工作。但是，当我添加分页器时;

$paginator = new \Phalcon\Paginator\Adapter\QueryBuilder(
        array(
            'builder' => $_ads,
            'limit' => 5,
            'page' => \Phalcon\DI::getDefault()->getShared('request')->getQuery('page', 'int')
        )
    );
    $ads = $paginator->getPaginate();

这给了我一个错误：PDOException: SQLSTATE[42000]: Syntax error or access violation: 1064....right syntax to use near ') AS rowcount FROM

paginator现在生成的查询是;

SELECT COUNT() AS `rowcount` 
FROM `classifieds_ads` AS `classifieds_ads` 
LEFT JOIN `classifieds_images` AS `classifieds_images` ON `classifieds_images`.`ad_id` = `classifieds_ads`.`id` 
WHERE `classifieds_ads`.`status` = 'active' AND (`classifieds_ads`.`title` LIKE '%query%' OR `classifieds_ads`.`description` LIKE '%query%' OR `classifieds_ads`.`tags` LIKE '%query%') 
HAVING `classifieds_ads`.`distance` <= 200

似乎SELECT COUNT()打破了查询，而且查询现在还不完整！我觉得这可能是因为我在SELECT table.field AS xxx使用了columns()。

我不确定这种意想不到的行为是否是一个错误，或者我是否会忽略某些事情。有什么想法吗？

Answer 1

$_ads = $this->modelsManager->createBuilder()
            ->columns([
                'distance'    => $dist,
                'id'          => 'classifieds_ads.id',
                'title'       => 'classifieds_ads.title',
                'description' => 'classifieds_ads.description',
                'city'        => 'classifieds_ads.city',
                'country'     => 'classifieds_ads.country',
                'latitude'    => 'classifieds_ads.latitude',
                'longitude'   => 'classifieds_ads.longitude',
                'image'       => 'classifieds_images.file',
            ])
            ->addFrom('\Baseapp\Models\ClassifiedsAds', 'classifieds_ads')
            ->leftJoin('\Baseapp\Models\ClassifiedsImages', "classifieds_images.ad_id = classifieds_ads.id", 'classifieds_images')
            ->where($where)
            ->groupBy('classifieds_ads.id')
            ->having($having)
            ->orderBy($order);

<强>更新

执行类似查询时，我似乎得到完全相同的错误

SQLSTATE [42000]：语法错误或访问冲突：1064您有 SQL语法错误;查看与您的手册相对应的手册 MySQL服务器版本，用于在'）AS rowcount附近使用正确的语法来自第1行的order'

我能够使用解决方法来解决这个问题。而不是使用QueryBuilder作为数据：

$paginator = new Phalcon\Paginator\Adapter\QueryBuilder(["builder" => $_ads, "limit" => 4, "page" => 1]);

我使用结果集作为数据：

$resultset = $_ads->getQuery()->execute();
$paginator = new Phalcon\Paginator\Adapter\Model(["data" => $resultset, "limit" => 4, "page" => 1]);

经过进一步研究，使用group by，QueryBuilder和Paginator时似乎存在问题。请参阅此open issue in Phalcon。

Phalcon Paginator打破查询生成器查询

1 个答案: