将子文档添加到现有 mongodb 文档
Adding child document to existing mongodb document
本质上,我只是想向我现有的 mongodb 文档添加一个新的子文档,该文档具有以下架构
/models/server/destination.js
// this is the "destination" model for mongoose
var mongoose = require('mongoose')
var Adventure = require('../models/adventure')
// this is the schema that every entry will get when a new trip is made.
var tripSchema = mongoose.Schema({
name: { type: String, required: true },
city: { type: String, required: true },
dateStart: { type: Date, required: true },
dateFinish: { type: Date, required: true },
adventures: [Adventure]
})
// module.exports makes this model available to other file
module.exports = mongoose.model('Destination', tripSchema)
/server/models/adventure.js
var mongoose = require('mongoose')
var adventure = mongoose.Schema({
site: String,
rating: String,
photo: String,
website: String,
date: Date
})
module.exports = mongoose.model('Adventure', adventure)
REST 路线 post 冒险
app.post('/api/destinations/:id/addAdventures', destinationsController.addAdventures)
/server/controllers/controller.js
module.exports.addAdventures = function(req, res) {
var id = req.params.id;
Destination.findOne({ _id: id }, function(err, result) {
var adventure = new Adventure(req.body)
var destination = result
destination.adventures.push(adventure)
destination.save(function(err, advresult) {
console.log('push worked')
res.json(advresult);
})
})
}
当我从 destination.adventures.push()
中取出冒险时,代码没有中断,但是当我插入冒险时,出现错误
/Travellog/node_modules/mongoose/lib/types/array.js:117
return this._schema.caster.cast(value, this._parent, false);
^ TypeError: undefined is not a function
at Array.MongooseArray.mixin._cast (/Travellog/node_modules/mongoose/lib/types/array.js:117:32)
at Array.MongooseArray.mixin._mapCast (/Travellog/node_modules/mongoose/lib/types/array.js:286:17)
at Object.map (native)
at Array.MongooseArray.mixin.push (/Travellog/node_modules/mongoose/lib/types/array.js:299:25)
at Query.<anonymous> (/Travellog/server/controllers/destinations-controller.js:28:28)
at /Travellog/node_modules/mongoose/node_modules/kareem/index.js:177:19
at /Travellog/node_modules/mongoose/node_modules/kareem/index.js:109:16
at process._tickCallback (node.js:355:11)
您收到的错误是嵌入 Adventure
模型而不是模式的结果。您需要在目标架构定义中添加 Adventure
架构 Adventure
模型的架构 属性:
// this is the "destination" model for mongoose
var mongoose = require('mongoose');
var AdventureSchema = require('../models/adventure').schema; /* <- access the schema via its Model.schema property */
var tripSchema = mongoose.Schema({
name: { type: String, required: true },
city: { type: String, required: true },
dateStart: { type: Date, required: true },
dateFinish: { type: Date, required: true },
adventures: [AdventureSchema]
});
本质上,我只是想向我现有的 mongodb 文档添加一个新的子文档,该文档具有以下架构
/models/server/destination.js
// this is the "destination" model for mongoose
var mongoose = require('mongoose')
var Adventure = require('../models/adventure')
// this is the schema that every entry will get when a new trip is made.
var tripSchema = mongoose.Schema({
name: { type: String, required: true },
city: { type: String, required: true },
dateStart: { type: Date, required: true },
dateFinish: { type: Date, required: true },
adventures: [Adventure]
})
// module.exports makes this model available to other file
module.exports = mongoose.model('Destination', tripSchema)
/server/models/adventure.js
var mongoose = require('mongoose')
var adventure = mongoose.Schema({
site: String,
rating: String,
photo: String,
website: String,
date: Date
})
module.exports = mongoose.model('Adventure', adventure)
REST 路线 post 冒险
app.post('/api/destinations/:id/addAdventures', destinationsController.addAdventures)
/server/controllers/controller.js
module.exports.addAdventures = function(req, res) {
var id = req.params.id;
Destination.findOne({ _id: id }, function(err, result) {
var adventure = new Adventure(req.body)
var destination = result
destination.adventures.push(adventure)
destination.save(function(err, advresult) {
console.log('push worked')
res.json(advresult);
})
})
}
当我从 destination.adventures.push()
中取出冒险时,代码没有中断,但是当我插入冒险时,出现错误
/Travellog/node_modules/mongoose/lib/types/array.js:117
return this._schema.caster.cast(value, this._parent, false);
^ TypeError: undefined is not a function
at Array.MongooseArray.mixin._cast (/Travellog/node_modules/mongoose/lib/types/array.js:117:32)
at Array.MongooseArray.mixin._mapCast (/Travellog/node_modules/mongoose/lib/types/array.js:286:17)
at Object.map (native)
at Array.MongooseArray.mixin.push (/Travellog/node_modules/mongoose/lib/types/array.js:299:25)
at Query.<anonymous> (/Travellog/server/controllers/destinations-controller.js:28:28)
at /Travellog/node_modules/mongoose/node_modules/kareem/index.js:177:19
at /Travellog/node_modules/mongoose/node_modules/kareem/index.js:109:16
at process._tickCallback (node.js:355:11)
您收到的错误是嵌入 Adventure
模型而不是模式的结果。您需要在目标架构定义中添加 Adventure
架构 Adventure
模型的架构 属性:
// this is the "destination" model for mongoose
var mongoose = require('mongoose');
var AdventureSchema = require('../models/adventure').schema; /* <- access the schema via its Model.schema property */
var tripSchema = mongoose.Schema({
name: { type: String, required: true },
city: { type: String, required: true },
dateStart: { type: Date, required: true },
dateFinish: { type: Date, required: true },
adventures: [AdventureSchema]
});