我一般来说对Mongoose和MongoDB还是陌生的，所以我很难确定这样的事情是否可行：
我正在尝试仅过滤那些created_by_id不是[]的文档。
这是架构。
var CampaignSchema = new Schema({
name: { type: String, required: true },
description: { type: String, required: true },
budget: { type: String, required: true },
tags: { type: [ String ], required: true },
status: { type: Number },
payment_id: { type: String },
created_by_id: [{ type: Schema.Types.ObjectId, ref: 'User' }],
attached_file: {
uploaded_on: { type: Date, default: Date.now },
uploaded_by: { type: String, required: true },
},
added_url: {
added_on: { type: Date, default: Date.now },
added_by: { type: String, required: true },
},
updated_by: { type: String },
created_on: { type: Date, default: Date.now },
updated_on: { type: Date }
}）;
这是代码：
_getCampaigns(req, res){
var token = helpersMethods.getToken(req.headers);
var page = parseInt(req.query.page) || 0; //for next page pass 1 here
var limit = parseInt(req.query.limit) || 10;
var term = new RegExp(req.query.search, 'i');
var obj = { "created_by_id": { "$ne": [] } };
if (token) {
Campaign.find(obj)
.populate({
path : 'created_by_id',
match : {
$or: [
{ name: { $regex: term }},
]
}
})
.sort({ updateAt: -1 })
.skip(page * limit)
.limit(limit)
.exec((err, doc) => {
if (err) {
return res.json(err);
}
Campaign.count(obj).exec((count_error, count) => {
if (err) {
return res.json(count_error);
}
return res.json({
total: count,
page: page,
pageSize: doc.length,
campaigns: doc
});
});
});
} else {
return res.status(403).send({success: false, msg: 'Unauthorized.'});
}
}
我正在得到这样的邮递员输出，但是我不希望没有created_by_id数组的对象：
{
"total": 2,
"page": 0,
"pageSize": 2,
"campaigns": [
{
"attached_file": {
"uploaded_by": "Demo user",
"uploaded_on": "2019-01-29T11:07:27.475Z"
},
"added_url": {
"added_by": "Demo user",
"added_on": "2019-01-29T11:07:27.475Z"
},
"tags": [
"tag1",
"tags2"
],
"_id": "5c5033ef28f63c72808f2225",
"created_by_id": {
"_id": "5c4965d477e7191c4d40b412",
"name": "Demo user",
"email": "demo@arth.tech",
"phone": "9918XXXXXX",
"type": "1",
"admin_rights": "1",
"password": "$2a$10$6T2ulNN60fBG9/vFgf8XhetkcWb/2zDxGXUMXMRi2Bltn8s1NEkbq",
"__v": 0,
"createdAt": "2019-01-24T07:31:03.327Z",
"loggedIn_at": "2019-01-30T06:33:04.388Z",
"loggedOut_at": "2019-01-24T08:03:44.091Z"
},
"name": "Test Campaign",
"description": "Discription of test campaign",
"budget": "2000",
"updated_by": "Demo User",
"created_on": "2019-01-29T11:07:27.475Z",
"__v": 0
},
{
"attached_file": {
"uploaded_by": "Demo User",
"uploaded_on": "2019-01-29T13:08:48.021Z"
},
"added_url": {
"added_by": "Demo user",
"added_on": "2019-01-29T13:08:48.021Z"
},
"tags": [
"test1",
"test2"
],
"_id": "5c505060b97f871123d97990",
"created_by_id": [],
"name": "Hello Campaign",
"description": "Description of Hello campaign",
"budget": "1000",
"updated_by": "Hello user",
"created_on": "2019-01-29T13:08:48.021Z",
"__v": 0
}
]
}
我只想要那些具有created_by_id（我想要的实际输出）的对象。
{
"total": 1,
"page": 0,
"pageSize": 1,
"campaigns": [
{
"attached_file": {
"uploaded_by": "Demo user",
"uploaded_on": "2019-01-29T11:07:27.475Z"
},
"added_url": {
"added_by": "Demo user",
"added_on": "2019-01-29T11:07:27.475Z"
},
"tags": [
"tag1",
"tags2"
],
"_id": "5c5033ef28f63c72808f2225",
"created_by_id": {
"_id": "5c4965d477e7191c4d40b412",
"name": "Demo user",
"email": "demo@arth.tech",
"phone": "9918XXXXXX",
"type": "1",
"admin_rights": "1",
"password": "$2a$10$6T2ulNN60fBG9/vFgf8XhetkcWb/2zDxGXUMXMRi2Bltn8s1NEkbq",
"__v": 0,
"createdAt": "2019-01-24T07:31:03.327Z",
"loggedIn_at": "2019-01-30T06:33:04.388Z",
"loggedOut_at": "2019-01-24T08:03:44.091Z"
},
"name": "Test Campaign",
"description": "Discription of test campaign",
"budget": "2000",
"updated_by": "Demo User",
"created_on": "2019-01-29T11:07:27.475Z",
"__v": 0
}
]
}
有什么可以帮助的吗？
答案 0 :(得分：0)
我做到了，我想要什么。这是更新的代码。
_getCampaigns(req, res){
var token = helpersMethods.getToken(req.headers);
var page = parseInt(req.query.page) || 0; //for next page pass 1 here
var limit = parseInt(req.query.limit) || 10;
var term = new RegExp(req.query.search, 'i');
var obj = {};
if (token) {
Campaign.find(obj)
.populate({
path : 'created_by_id',
match : {
$or: [
{ name: { $regex: term }},
]
}
})
.sort({ updateAt: -1 })
.skip(page * limit)
.limit(limit)
.exec((err, docs) => {
if (err) {
return res.json(err);
}else{
docs = docs.filter(function(doc) {
return doc.created_by_id.length != 0;
});
Campaign.count(obj).exec((count_error, count) => {
if (err) {
return res.json(count_error);
}else{
return res.json({
total: count,
page: page,
pageSize: docs.length,
campaigns: docs
});
}
});
}
});
} else {
return res.status(403).send({success: false, msg: 'Unauthorized.'});
}
}