即使它存在，mongoose findOne也不提供该文档

Question

我的查询如下所示：

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const Books = new Schema({
    Name: {
        type: String,
        required: true
    },
    Author: {
        type: String,
        required: true
    },
    CurrentlyAvailableStatus: {
        type: Boolean,
        required: true,
        default: true // true --> book available false --> book not available
    }

}, {
    versionKey: false
});



module.exports = mongoose.model('books', Books);

Books.js

console.log("book" +info)

现在，我的查询为{{1}}提供了空结果，即使文档在数据库中，该查询有什么问题？

Answer 1

您正在查询错误的字段名称

Books.findOne({ 'Book': book_name })

应该是

Books.findOne({ Name: book_name })