node.js - Mongoose 在 Ref 模式中保存对象数组

Question

我有父架构:

const parentSchema = new Schema({
   name: {
   type: String,
  },
 children: [{
    type: Schema.Types.ObjectId,
    ref: "Children"
  }]
})

这是Children架构:

const childrenSchema = Schema({
  name: {
   type: String
  },
  surname: {
   type: String
  }
})

我有一个传入的用户注册 POST 请求，格式如下:

{
 "name": "TEST", 
 "children" : [
    { "name":"test","surname": "test" },
    { "name":"test","surname": "test" }
 ]
}

这是路由器:

 router.post("/register", (req, res, next) => {
  const {name, children} = req.body;
  let newParent = newParent({
    name,
    children
   });
  newParent.save((err, result) => {
    // res.send(result) etc.
  })
 }

这会导致以下错误:

路径“children”处的值“[ { name: 'test', surname: 'test' } ]”转换为数组失败

如何保存所有子项并仅将子项_id保留在ref中，以便稍后可以填充Parent集合？

Answer 1

To save childData in Parents, You need to save first child's data in children schema Then get childIds and save to Parent Data.

工作示例:

let req = {
    "name" : "TEST", 
    "children" : [
       { "name":"test","surname": "test" },
       { "name":"test","surname": "test" }
    ]
   }

   Children.collection.insert(req.children, function (err, docs) {
    if (err){ 
       conasolw.log(err);
    } else {
      var ids =  docs.ops.map(doc=>{ return doc._id});;
      console.log(ids);
      let newParent = Parent({
        name : req.name,
        children : ids
       });
       newParent.save((err, result) => {
         console.log('parent save');
         console.log(err);
         console.log(result);
      })
    }
  });

注意:

Test on "mongoose": "^5.3.3"