使用Mongoose和Express創建嵌入式文檔

Question

將我的大腦架起來使用Mongoose創建嵌入式文檔。我收到以下錯誤，當我提交表單：

500 CastError：演員到undefined_method失敗值 「評論到這裏」

代碼：

index.js

var db = require('mongoose'); 
var Todo = db.model('Todo'); 

exports.create = function(req, res, next){ 
    new Todo({ 
     title  : req.body.title, 
     content : req.body.content, 
     comments : req.body.comments, 
    }).save(function(err, todo, count){ 
    if(err) return next(err); 
    res.redirect('/'); 
    }); 
}; 

db.js

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

// recursive embedded-document schema 
var commentSchema = new Schema(); 

commentSchema.add({ 
    content : String 
    , comments : [Comment] 
}); 

var Comment = mongoose.model('Comment', commentSchema); 

var todoSchema = new Schema({ 
    title  : { type: String, required: true } 
    , content : String 
    , comments : [Comment] 
}); 

var Todo = mongoose.model('Todo', todoSchema); 

玉形式

form(action="/create", method="post", accept-charset="utf-8") 
    input.inputs(type="text", name="title") 
    input.inputs(type="text", name="content") 
    input.inputs(type="text", name="comments") 
input(type="submit", value="save") 

Answer 1

要使嵌套/嵌入式文檔起作用，您必須使用.push（）方法。

var Comment = new Schema({ 
    content : String 
    , comments : [Comment] 
}); 

var Todo = new Schema({ 
    user_id : String 
    , title  : { type: String, required: true } 
    , content : String 
    , comments : [Comment] 
    , updated_at : Date 
}); 

mongoose.model('Todo', Todo); 
mongoose.model('Comment', Comment); 

exports.create = function(req, res, next){ 
    var todo = new Todo(); 
     todo.user_id = req.cookies.user_id; 
     todo.title  = req.body.title; 
     todo.content = req.body.content; 
     todo.updated_at = Date.now(); 
     todo.comments.push({ content : req.body.comments }); 

    todo.save(function(err, todo, count){ 
    if(err) return next(err); 

    res.redirect('/'); 
    }); 
}; 

Answer 2

貓鼬車型從未涉足模式。只有基本的數據類型和貓鼬模式。不確定是否有遞歸註釋模式的陷阱，但嘗試像這樣。

var commentSchema = new Schema(); 

commentSchema.add({ 
    , content : String 
    , comments : [commentSchema] 
}); 

var todoSchema = new Schema({ 
    , title  : { type: String, required: true } 
    , content : String 
    , comments : [commentSchema] 
}); 

var Todo = mongoose.model('Todo', todoSchema); 
var Comment = mongoose.model('Comment', commentSchema);