>我在MongoDB中有一个名为shop的集合
shop{
"_id" : "523c1e",
"address" : "100, University Road",
"city" : "xyz",
"contact_name" : "John",
"deals" : [
{
"deal_id" : "524913",
"deal_type" : "Sale",
"deal_description" : "Very good deal",
"start_date" : "2013-09-12",
"end_date" : "2013-09-31"
},
{
"deal_id" : "52491abf6",
"deal_type" : "Sale",
"deal_description" : "Buy 2 jeans, get one free",
"start_date" : "2013-09-20",
"end_date" : "2013-10-31"
}
],
}
我想使用 mongodb 和 php 查找正在运行的交易(当前日期"2013-10-01")和 _id="523c1e",
所以我会得到,
{
"deal_id" : "52491abf6",
"deal_type" : "Sale",
"deal_description" : "Buy 2 jeans, get one free",
"start_date" : "2013-09-20",
"end_date" : "2013-10-31"
}
请帮助我纠正此查询,
我正在尝试这个,但没有给出任何输出
<?php
date_default_timezone_set('Asia/Kolkata');
$date=date('Y-m-d');
$pro_id='523c1e';
$cursor = $collection->find(array("_id" => "$pro_id",$date => array('$gt' => 'deals.start_date','$lte' => 'deals.end_date')),array("deals" => 1));
foreach($cursor as $document)
{
echo json_encode(array('posts'=>$document));
}
?>
请帮帮我...
如果我
正确理解了这个问题,您正在尝试仅返回与搜索条件匹配的子文档?
这是通过在投影中使用位置 $ 运算符来完成的。
$criteria = array("some.nested.structure" => 42);
$project = array("some.$.structure" => 1);
$collection->find($criteria, $project);
对于您的情况,这将是这样的:
$criteria = array(
"_id" => $pro_id,
"deals.start_date" => array('$lte' => $date),
"deals.end_date" => array('$gt' => $date)
);
$project = array("deals.$" => 1);
$cursor = $collection->find($criteria, $project);
请注意,您的搜索查询是错误的。你不能说值=>数组(运算符=>字段名),这根本不是MongoDB语法。例如,请参阅有关如何使用 $lt 运算符的 http://docs.mongodb.org/v2.2/reference/operator/query/lt/