每当您在模型类上调用静态方法时,它都会返回一个 Fluent 查询,例如DB::table('yourmodeltable')->method
. 如果您牢记这一点,您很快就会意识到可以使用 Eloquent 模型进行任何查询。
现在,为了获得更高的性能,您可以使用 SQL 的DATE()函数。我下面的示例未经测试,因此请随时更正。
// tomorrow -1 week returns tomorrow's 00:00:00 minus 7 days
// you may want to come up with your own date tho
$date = new DateTime('tomorrow -1 week');
// DATE(objecttime) turns it into a 'YYYY-MM-DD' string
// records are then grouped by that string
$days = Object::where('objecttime', '>', $date)
->group_by('date')
->order_by('date', 'DESC') // or ASC
->get(array(
DB::raw('DATE(`objecttime`) AS `date`'),
DB::raw('COUNT(*) as `count`')
));
foreach ($days as $day) {
print($day->date . ' - '. $day->count);
}
这应该打印如下内容:
2013-03-09 - 13
2013-03-10 - 30
2013-03-11 - 93
2013-03-12 - 69
2013-03-13 - 131
2013-03-14 - 185
2013-03-15 - 69
编辑:
上面建议的方法返回 Eloquent 模型的实例,这可能看起来很奇怪,特别是如果你var_dump($days)
. 你也可以使用 Fluent 的list()
方法来达到同样的效果。
$date = new DateTime('tomorrow -1 week');
// lists() does not accept raw queries,
// so you have to specify the SELECT clause
$days = Object::select(array(
DB::raw('DATE(`objecttime`) as `date`'),
DB::raw('COUNT(*) as `count`')
))
->where('created_at', '>', $date)
->group_by('date')
->order_by('date', 'DESC') // or ASC
->lists('count', 'date');
// Notice lists returns an associative array with its second and
// optional param as the key, and the first param as the value
foreach ($days as $date => $count) {
print($date . ' - ' . $count);
}