我正在尝试从 node.js/Express 在 Mongoose 模式中创建子文档。
我有两个架构:成员和地址
成员(member).js
// app/models/member.js
// load mongoose since we need it to define a model
var mongoose = require('mongoose'),
Schema = mongoose.Schema
var Address = require('./address');
var MemberSchema = Schema({
FName : String,
LName : String,
address : [Address],
phone : {
type : String,
number : String
},
email: String,
gender: String,
DOB: Date,
rank : {
level : String,
updated: { type: Date, default: Date.now }
},
Awards : {
personal : Boolean,
award : { type : Schema.Types.ObjectId, ref : 'Award' },
granted: { type: Date, default: Date.now }
}
});
module.exports = mongoose.model('Member', MemberSchema);
地址.js
// app/models/address.js
// load mongoose since we need it to define a model
var mongoose = require('mongoose'),
Schema = mongoose.Schema
var AddressSchema = Schema({
type : String,
street1 : String,
street2 : String,
City : String,
State : String,
Zip : Number,
Lat : Number,
Lng : Number
});
module.exports = mongoose.model('Address', AddressSchema);
我的目的是创建一个成员,然后添加一个地址。 对成员的 POST 调用有效。但是,当对地址执行 POST 调用时,它失败并显示未定义,并且我找不到错误的位置。我希望了解如何更好地将地址添加到我的成员(member)架构中。
routes.js
app.route('/api/member')
.get(function(req, res) { ...
.post(function(req, res) {
var new_member = new member();
new_member.FName = req.body.fname;
new_member.LName = req.body.lname;
new_member.DOB = req.body.DOB;
new_member.email = req.body.email;
new_member.gender = req.body.gender;
new_member.save(function(err) {
if (err)
res.send(err);
res.json({ message: 'Member Created!' });
});
});
app.route('/api/member/:member_id/address')
.post(function(req, res) {
member.findById(req.params.member_id, function(err, member) {
if (err)
return (err);
new_address = new address();
new_address.type = req.body.atype;
new_address.street1 = req.body.street1;
new_address.street2 = req.body.street2;
new_address.City = req.body.City;
new_address.State = req.body.State;
new_address.Zip = req.body.Zip;
new_address.Lat = req.body.Lat;
new_address.Lng = req.body.Lng;
console.log(new_address);
member.address.push(new_address);
res.json({ message : "Address added!!" });
});
});
就像我说的,添加成员(member)很容易。添加地址会导致以下错误:
/Users/arcee123/projects/MCARS/node_modules/mongoose/lib/utils.js:419
throw err;
^
TypeError: undefined is not a function
at Array.MongooseArray._cast (/Users/arcee123/projects/MCARS/node_modules/mongoose/lib/types/array.js:108:30)
at Object.map (native)
at Array.MongooseArray.push (/Users/arcee123/projects/MCARS/node_modules/mongoose/lib/types/array.js:262:23)
at Promise.<anonymous> (/Users/arcee123/projects/MCARS/app/routes.js:108:24)
at Promise.<anonymous> (/Users/arcee123/projects/MCARS/node_modules/mongoose/node_modules/mpromise/lib/promise.js:162:8)
at Promise.emit (events.js:107:17)
at Promise.emit (/Users/arcee123/projects/MCARS/node_modules/mongoose/node_modules/mpromise/lib/promise.js:79:38)
at Promise.fulfill (/Users/arcee123/projects/MCARS/node_modules/mongoose/node_modules/mpromise/lib/promise.js:92:20)
at /Users/arcee123/projects/MCARS/node_modules/mongoose/lib/query.js:1833:13
at model.Document.init (/Users/arcee123/projects/MCARS/node_modules/mongoose/lib/document.js:251:11)
15 Jun 15:45:49 - [nodemon] app crashed - waiting for file changes before starting...
我哪里出错了? 谢谢
更新 1:地址推送的 .post 调用现在如下所示:
.post(function(req, res) {
member.findById(req.params.member_id, function(err, member) {
if (err)
return (err);
new_address = new address();
new_address.type = req.body.atype;
new_address.street1 = req.body.street1;
new_address.street2 = req.body.street2;
new_address.City = req.body.City;
new_address.State = req.body.State;
new_address.Zip = req.body.Zip;
new_address.Lat = req.body.Lat;
new_address.Lng = req.body.Lng;
console.log(new_address);
if(member.address === undefined){
member.address.push(new_address);
}
else{
member.address = [new_address];
}
member.save(function(err) {
if (err)
res.send(err);
res.json({ message: 'Address created!!!' });
});
});
});
最佳答案
由于当您从数据库检索模型时,Mongoose 不需要地址字段,因此不会定义该字段。因此您将无法添加地址字段。 您应该检查它是否存在
if(member.address !== undefined){
member.address.push(new_address);
}
else{
member.address = [new_address];
}
编辑:此外,您还必须将其保存回数据库中。 (也可以看看更新功能)
关于javascript - 如何在 Mongoose 模式中添加子文档,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30854692/