聚合统计非数字类型字段问题

[korn519]

think-mongo/src/Builder.php

Line 525 in 4e01004

['$group' => ['_id' => $group, 'aggregate' => ['$' . $fun => '$' . $field]]],

应该单独判断“ ['$group' => ['_id' => $group, 'aggregate' => ['$' . $fun => '$' . $field]]],”中的$fun，如果时统计，可以直接设置为['$sum' => 1]，否则当field字段为非数字时无法统计。

我的解决方法是：
if ($fun == 'count') {
$pipeline = [
['$match' => (object) $this->parseWhere($query, $options['where'])],
['$group' => ['_id' => $group, 'aggregate' => ['$sum' => 1]]],
];
} else {
$pipeline = [
['$match' => (object) $this->parseWhere($query, $options['where'])],
['$group' => ['_id' => $group, 'aggregate' => ['$' . $fun => '$' . $field]]],
];
}