Question

我的控制器中有一个自定义查询，我想实现我在cakephp.org上找到的自定义查询分页，但它们的示例与我的不同。有人可以帮助我在我的观点中对此结果进行分页：

    $cars = $this->Car->query(" select Car.id, Car.make, Car.model, Car.year, Car.description, CarImage.thumbnail
                                    from cars Car
                                    inner join car_images CarImage on Car.default_image_id = CarImage.id
                                    where Car.make like '" . $category . "'
                                    order by Car.created DESC
                                    limit 10");
    $this->set('cars', $cars);

Answer 1

在您的模型中实施paginate和paginateCount：

function paginate($conditions, $fields, $order, $limit, $page, $recursive, $extra)
{
    return $this->query('SELECT ...');
}

function paginateCount($conditions, $recursive, $extra)
{
    return $this->query('SELECT COUNT(.....');
}

另请查看以下内容中的paginate函数：cake / libs / controller / controller.php

Answer 2

看起来应该可以在不使用自定义分页的情况下完成。

您应该在模型中设置以下关系：

Car hasMany（或hasOne）CarImage
CarImage属于Car

然后您应该能够使用以下内容获得这些确切的数据：

<?php
class CarsController extends AppController {
  var $paginate = array('limit'=>'10',
                        'order'=>'Car.created',
                        'fields'=>array('Car.model','Car.year','Car.description',
                                        'CarImage.thumbnail'));

  function test() {
    // not sure where you are getting the where clause, if its from some form
    // you'll want to check look in $this->data
    $category = "somevalue";
    // set the LIKE condition
    $conditions = array('Car.make LIKE' => '%'.$category.'%');
    // apply the custom conditions to the pagination
    $this->set('cars', $this->paginate($conditions);
  }
}
?>

有关复杂查找条件的更多信息（可以像我在上面的示例中那样通过传入数组应用于分页）：http://book.cakephp.org/view/74/Complex-Find-Conditions

Answer 3

在Cake 3中，您可以使用带有函数find（）的deafult paginator。

按照示例：

$query = $this->Car->find()
                ->select(['Car.id', 'Car.make','Car.model','Car.year','Car.description','CarImage.thumbnail'])
                ->join([
                        'table' => 'CarImage',
                        'alias' => 'CarImage',
                        'type' => 'INNER',
                        'conditions' => 'CarImage.id = Car.default_image_id,
                ])
                ->where(['Car.make LIKE' => '%$category%'])
                ->order(['Car.created' => 'DESC'])
                ->limit(50)

        $cars = $this->paginate($query);

        $this->set(compact('cars'));
        $this->set('_serialize', ['cars']);

Answer 4

mysql限制子句支持卷和偏移量，因此每页10个结果....

select * from table limit 0, 10

第1页

select * from table limit 10, 10

第2页

select * from table limit 20, 10

第3页

select * from table limit ($page-1)*$perPage, $perPage

通用

Answer 5

mysql限制子句支持卷和偏移量，因此每页10个结果....

自定义查询分页Cakephp

5 个答案: