如何在Mongoose中执行查找查询?

时间:2017-03-01 20:50:37

标签: node.js mongodb express mongoose mongoose-schema

我有mongodb中的Ebooks数据集合,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)
}

现在我想搜索一下,如果关键字与"title:"有点匹配,则显示所有相关图书对象。

我的Mongoose架构是: -

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);

我尝试: -

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怎么办?我只想在搜索一点点关键字时找到所有相关对象。

1 个答案:

答案 0 :(得分:6)

尝试用curlies包装你的查询,Mongoose期望一个对象作为查询。

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 }));
    });