如何使用 Mongoose 从 Mongo 获取数据?
使用 mongoose 从 mongo 获取任何数据时遇到问题。连接看起来很好,因为我已经打印出了调试语句。我已经彻底搜索了可能导致此问题的原因,但据我所知,我正在设置架构和集合。
这是我在一个名为 posts.js 的文件中的内容:
var mongoose = require('mongoose');
var db = mongoose.connect('mongodb://localhost:27017/sister', function(err) {
if (err) throw err;} //this does not get printed
);
mongoose.connection.on("open", function(){
console.log("mongodb is connected")} //this gets printed
);
var Schema = mongoose.Schema;
var thePost = new Schema({
name : String
});
mongoose.model('post', thePost);
var posts = db.model('post');
posts.find({}, [], function(err, calls) {
console.log(err, calls, calls.length); //prints out: null [] 0
});
为了播种数据,我在 mongo shell 中完成了此操作,它插入一个文档,然后显示 find all 可以找到它:
> randumb = { name : 'emile' };
{ "name" : "emile" }
> db.post.insert(randumb);
> db.post.find({});
{ "_id" : ObjectId("4e775e8cc24f31883fdafbab"), "name" : "emile" }
Running into problems getting any data out of mongo using mongoose. The connection seems fine as i've got debugging statements that are being printed out. I've searched high and low for what could be causing this but afaik I'm setting up the schema and collections fine.
here's what i have in a file called posts.js:
var mongoose = require('mongoose');
var db = mongoose.connect('mongodb://localhost:27017/sister', function(err) {
if (err) throw err;} //this does not get printed
);
mongoose.connection.on("open", function(){
console.log("mongodb is connected")} //this gets printed
);
var Schema = mongoose.Schema;
var thePost = new Schema({
name : String
});
mongoose.model('post', thePost);
var posts = db.model('post');
posts.find({}, [], function(err, calls) {
console.log(err, calls, calls.length); //prints out: null [] 0
});
To seed the data, I've done this in my mongo shell, which inserts a document and then shows that find all can find it:
> randumb = { name : 'emile' };
{ "name" : "emile" }
> db.post.insert(randumb);
> db.post.find({});
{ "_id" : ObjectId("4e775e8cc24f31883fdafbab"), "name" : "emile" }
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