如何在 Mongoose 中执行查找查询？

Question

我在 mongodb 中有 collection 个电子书数据，例如

{ 
    "_id" : ObjectId("58b56fe19585b10cd42981d8"), 
    "cover_path" : "D:\Ebooks\uploads\ebooks\cover\1488285665748-img1-700x400.jpg", 
    "path" : "D:\Ebooks\uploads\ebooks\pdf\1488285665257-Webservices Natraz.pdf", 
    "description" : "ebook", 
    "title" : "book name", 
    "tag" : [
        "Hindi", 
        "Other"
    ], 
    "__v" : NumberInt(0)
}

现在我想搜索一些东西，如果关键字与 "title:" 有点匹配，然后显示所有相关书籍 object。

我的猫鼬模式是：-

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

var EbookSchema   = new Schema({
    title: {type:String},
    description: {type:String},
    path: {type:String,required:true},
    cover_path: {type:String,required:true},
    tag: [{ type: String }]

});
module.exports = mongoose.model('Ebook', EbookSchema);

我试试 :-

app.get('/ebook?search=',function(req,res){
var search_key = req.param('search');
    Ebook.find(title:'search',function(err, ebooks) {
            if (err)
                res.send(err);

            res.json(ebooks);
        });
    });

但我发现 null 我该怎么办？我只想在搜索 little-bit 关键字时找到所有相关的 object 。

Answer 1

尝试用卷曲包装您的查询，Mongoose 需要一个对象作为查询。

app.get('/ebook?search=',function(req,res){
var search_key = req.param('search');
    Ebook.find({title: search_key})
       .then(ebooks => res.json(ebooks))
       .catch(err => res.status(404).json({ success: false }));
    });

如何在 Mongoose 中执行查找查询？

How do I perform a find query in Mongoose?

mongoose

mongodb

node.js

express

mongoose-schema