我尝试使用Find()
命令查找整个文档,并使用条件过滤嵌套数组。
这是一个使用过的Schema:
var ListSH = new Schema({
name: { type: String, unique: true, required: true},
subject : String,
recipients : [
Schema({
uid : { type : ObjectId, required : true, ref:'User', unique: true},
status : { type : Number, default : 1 }
},{_id: false})
]
};
目前我做ListModel.findOne({ _id : req.params.id_list, function(err,list){...};
邮递员告诉我:
{
"_id": "57e6bcab6b383120f0395aed",
"name": "Emailing listname",
"subject": "List subject",
"recipients": [
{
"uid": "57e932bcbbf0e9e543def600",
"status": 0
},
{
"uid": "57e93266c3c0b1dc1625986f",
"status": 1
}
]
}
我希望Postman通过添加recipients.status : 1
条件给我这样的回复
{
"_id": "57e6bcab6b383120f0395aed",
"name": "Emailing listname",
"subject": "List subject",
"recipients": [
{
"uid": "57e93266c3c0b1dc1625986f",
"status": 1
}
]
}
我已经尝试ListModel.findOne({ _id : req.params.id_list, 'recipients.status' : 1}, function(err,list){...};
和像populate([$match('recipients.status : 1)]);
这样奇怪的东西
但没有成功..
有谁知道? 谢谢^^
答案 0 :(得分:3)
尝试以下查询:
ListModel.findOne({"_id" : "57e6bcab6b383120f0395aed", 'recipients.status' : 1},{_id:1, name: 1, subject:1,'recipients.$': 1}, function(err,list){...});
答案 1 :(得分:1)
您可以使用aggregate
以这种方式轻松获取
ListModel.aggregate(
{ $match: {_id: ObjectId("57e6bcab6b383120f0395aed")}},
{ $unwind: '$recipients'},
{ $match: {'recipients.status':1}})
<强>输出强>
{
"_id" : ObjectId("57e6bcab6b383120f0395aed"),
"name" : "Emailing listname",
"subject" : "List subject",
"recipients" : {
"uid" : "57e93266c3c0b1dc1625986f",
"status" : 1
}
}
要详细了解汇总,请参阅文档here