cakephp 3 order by query 生成 14 个带有关联表的查询而不是 1 个

Question

我的 cakephp3 应用程序运行良好，现在我希望通过关联的 table 字段对一些查询进行排序。

当按当前模型中的字段排序时，查询工作正常。但是，如果我选择按关联 table 中的字段 Models.field 进行排序，我现在会得到 14 sql 个查询，而不是一个。但真正的问题是 ORDER BY 不包含在查询中。

我在具有 employee_id 和 course_id 字段的 CoursesEmployees 模型中。

CoursesEmployeesController.php

public function certificate() {
    $this->paginate = [
        'sortWhitelist' => [
            'Employees.surname', 'Courses.name', 'date_completed'
        ],
        'conditions' => ['CoursesEmployees.completed' => true, 'Employees.user_id' => $this->Auth->user('id')],
        'contain' => ['Employees', 'Courses'],
        'order' => ['Employees.name'=>'asc']
    ];
    $this->set('coursesEmployees', $this->paginate($this->CoursesEmployees));
}

如果我通过 'order' => ['date_created'=>'asc'] 订购，我会收到一个查询并且一切正常。

SELECT
    CoursesEmployees.id AS `CoursesEmployees__id`,
    CoursesEmployees.employee_id AS `CoursesEmployees__employee_id`,
    CoursesEmployees.course_id AS `CoursesEmployees__course_id`,
    CoursesEmployees.course_module_id AS `CoursesEmployees__course_module_id`,
    CoursesEmployees.cid AS `CoursesEmployees__cid`,
    CoursesEmployees.progress AS `CoursesEmployees__progress`,
    CoursesEmployees.modified AS `CoursesEmployees__modified`,
    CoursesEmployees.created AS `CoursesEmployees__created`,
    CoursesEmployees.completed AS `CoursesEmployees__completed`,
    CoursesEmployees.date_completed AS `CoursesEmployees__date_completed`,
    Employees.id AS `Employees__id`,
    Employees.user_id AS `Employees__user_id`,
    Employees.hotel_id AS `Employees__hotel_id`,
    Employees.name AS `Employees__name`,
    Employees.email AS `Employees__email`,
    Employees.surname AS `Employees__surname`,
    Employees.employee_num AS `Employees__employee_num`,
    Employees.modified AS `Employees__modified`,
    Employees.created AS `Employees__created`,
    Courses.id AS `Courses__id`,
    Courses.name AS `Courses__name`,
    Courses.course_lenght AS `Courses__course_lenght` 
FROM
    courses_employees CoursesEmployees 
INNER JOIN
    employees Employees 
        ON Employees.id = (
            CoursesEmployees.employee_id
        ) 
INNER JOIN
    courses Courses 
        ON Courses.id = (
            CoursesEmployees.course_id
        ) 
WHERE
    (
        CoursesEmployees.completed = 1 
        AND Employees.user_id = '1'
    ) 
ORDER BY
    CoursesEmployees.date_completed asc LIMIT 20 OFFSET 0

如果我 'order' => ['Employees.name'=>'asc']（或字段名称的任何随机文本）我得到 14 sql 个查询，而主查询没有按应有的顺序排列。

SHOW FULL COLUMNS FROM `courses_employees`  10  1

SHOW INDEXES FROM `courses_employees`   1   0

SELECT * FROM information_schema.key_column_usage AS kcu INNER JOIN information_schema.referential_constraints AS rc ON (kcu.CONSTRAINT_NAME = rc.CONSTRAINT_NAME) WHERE kcu.TABLE_SCHEMA = 'deep_mind' AND kcu.TABLE_NAME = 'courses_employees' and rc.TABLE_NAME = 'courses_employees'    0   0

SHOW TABLE STATUS WHERE Name = 'courses_employees'  1   0

SHOW FULL COLUMNS FROM `employees`  9   1

SHOW INDEXES FROM `employees`   1   0

SELECT * FROM information_schema.key_column_usage AS kcu INNER JOIN information_schema.referential_constraints AS rc ON (kcu.CONSTRAINT_NAME = rc.CONSTRAINT_NAME) WHERE kcu.TABLE_SCHEMA = 'deep_mind' AND kcu.TABLE_NAME = 'employees' and rc.TABLE_NAME = 'employees'    0   0

SHOW TABLE STATUS WHERE Name = 'employees'  1   0

SHOW FULL COLUMNS FROM `courses`    3   1

SHOW INDEXES FROM `courses` 1   0

SELECT * FROM information_schema.key_column_usage AS kcu INNER JOIN information_schema.referential_constraints AS rc ON (kcu.CONSTRAINT_NAME = rc.CONSTRAINT_NAME) WHERE kcu.TABLE_SCHEMA = 'deep_mind' AND kcu.TABLE_NAME = 'courses' and rc.TABLE_NAME = 'courses'    0   0

SHOW TABLE STATUS WHERE Name = 'courses'    1   0

SELECT
    CoursesEmployees.id AS `CoursesEmployees__id`,
    CoursesEmployees.employee_id AS `CoursesEmployees__employee_id`,
    CoursesEmployees.course_id AS `CoursesEmployees__course_id`,
    CoursesEmployees.course_module_id AS `CoursesEmployees__course_module_id`,
    CoursesEmployees.cid AS `CoursesEmployees__cid`,
    CoursesEmployees.progress AS `CoursesEmployees__progress`,
    CoursesEmployees.modified AS `CoursesEmployees__modified`,
    CoursesEmployees.created AS `CoursesEmployees__created`,
    CoursesEmployees.completed AS `CoursesEmployees__completed`,
    CoursesEmployees.date_completed AS `CoursesEmployees__date_completed`,
    Employees.id AS `Employees__id`,
    Employees.user_id AS `Employees__user_id`,
    Employees.hotel_id AS `Employees__hotel_id`,
    Employees.name AS `Employees__name`,
    Employees.email AS `Employees__email`,
    Employees.surname AS `Employees__surname`,
    Employees.employee_num AS `Employees__employee_num`,
    Employees.modified AS `Employees__modified`,
    Employees.created AS `Employees__created`,
    Courses.id AS `Courses__id`,
    Courses.name AS `Courses__name`,
    Courses.course_lenght AS `Courses__course_lenght` 
FROM
    courses_employees CoursesEmployees 
INNER JOIN
    employees Employees 
        ON Employees.id = (
            CoursesEmployees.employee_id
        ) 
INNER JOIN
    courses Courses 
        ON Courses.id = (
            CoursesEmployees.course_id
        ) 
WHERE
    (
        CoursesEmployees.completed = 1 
        AND Employees.user_id = '1'
    ) LIMIT 20 OFFSET 0

Answer 1

如果您立即重新运行脚本，您应该会看到那些查询消失了。

这些查询用于获取数据以生成模式和其他元数据，默认情况下，这应该很少发生，因为数据正在被缓存，因为在您的应用程序数据源配置中启用了 cacheMetadata。

默认情况下，数据缓存 2 分钟，请检查您的应用缓存配置 _cake_model_。这是当应用程序处于调试模式运行ning 时将要使用的值。当不处于调试模式时，持续时间默认设置为 1 年，请检查您的应用 boostrap.php.

另见

至于您缺少订单字段的问题，您在白名单中缺少 Employees.name 字段，但是即使将其他型号的字段列入白名单似乎也不起作用。

这似乎是分页器中的一个错误，即在 PaginatorComponent::_prefix() 方法中，该字段被吞没，最终导致一个空的 order 选项被传递给查询。

看起来这已经被报道过，fixed 即将发布的 3.0.7 版本。如果您等不及，请抓住 master 分支或应用补丁。

cakephp 3 order by query 生成 14 个带有关联表的查询而不是 1 个

cakephp 3 order by query generates 14 queries with associate tables instead of 1

cakephp

cakephp-3.0