为什么 Mongoose 查询返回空数组
您好，我已经查看了与我提出的问题类似的问题，但没有一个解决方案适合我的问题。我正在开发一个API。
当我使用有效负载发送响应时，我从客户端获取请求有效负载，并在服务器端获取响应有效负载，当我尝试使用猫鼬查询（搜索）时，我遇到了空数组的问题。所有东西都签出，例如：
连接到猫鼬， 数据库确实存在， 集合存在并且具有我的接口/类的默认名称。
为了确保我有正确的数据库名称，我在第一次执行 mongoose.connect('mongodb://localhost/database ) 时创建了它
。我的 mongoose 架构文件存在。它采用默认值类上的名称，它是单数的，有人可以帮助告诉我我做错了什么吗，
Interface
export interface Products{
_id: string,
name: string
}
//imported in my service.ts
livesearch.js。 架构
const mongoose = require('mongoose');
const productSchema = new mongoose.Schema({
name:{
type: String,
required: true
}
});
module.exports = mongoose.model('Products', productSchema, 'products');
product.js
router.post('/getProducts', async(req, res) =>{
let payload=req.body.payload;//server needs to extract payload property
console.log("Payload", payload);
console.log("Heading to search");
let search = await Products.find({name: {$regex: new RegExp('^'+payload+'.*',
'i')}}).exec();
console.log("Search", search) empty array
//Limit search to 10
search = search.slice(0, 10);
//res.send({payload:load}); //this works
res.send({payload:search});
})
数据库和集合
> show collections
productLiveSearch
products
>
Hello I have looked at similar questions to the one I asked but none of the resolutions fit my issue. I am developing an API.
I get the request payload from client and a response payload on the server side when I send response using payload, it's when I try to use a mongoose query(search) that I run into an issue with an empty array. All things checkout such as:
Connected to mongoose,
Database does exist,
Collection exist and has default name of my interface/class.
To be assured I had the correct db name I let it be created when I did mongoose.connect('mongodb://localhost/database for first time
My mongoose schema file exists. It takes on the default name on the class and it is singular. I have included a small snippet. Can someone help tell me what I'm doing wrong,
Interface
export interface Products{
_id: string,
name: string
}
//imported in my service.ts
livesearch.js
Schema
const mongoose = require('mongoose');
const productSchema = new mongoose.Schema({
name:{
type: String,
required: true
}
});
module.exports = mongoose.model('Products', productSchema, 'products');
product.js
router.post('/getProducts', async(req, res) =>{
let payload=req.body.payload;//server needs to extract payload property
console.log("Payload", payload);
console.log("Heading to search");
let search = await Products.find({name: {$regex: new RegExp('^'+payload+'.*',
'i')}}).exec();
console.log("Search", search) empty array
//Limit search to 10
search = search.slice(0, 10);
//res.send({payload:load}); //this works
res.send({payload:search});
})
Database and collection
> show collections
productLiveSearch
products
>
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评论（1）
您的收藏中可能没有任何东西；您需要首先填充它以便查询返回值。
Your collection likely doesn't have anything in it; you need to populate it first for a query to return with values.