node.js - ReactJS + Axios + NodeJS - _id : Cannot read property 'ownerDocument' of null

Question

我有一个通过 Axios 连接到 Node 后端的 ReactJS 应用程序。我正在尝试更新，并且有效负载是正确的，但我有一个尴尬的问题:它说我没有发送需要更新的 _id 。这是我的 mongoose Schema、Axios 中的请求及其 Express 后端方法。

axios 请求:

    submit () {
    let data = this.state.category
    axios({
        method: this.state.category._id ? 'put':'post',
        url: `/category/${this.state.category._id || ''}`,
        data: data
    })
    .then(res => {
        let list = this.state.categoryList
        list.push(res.data.category)
        this.update({
            alert: {
                type: "success",
                text: "Category updated"
            },
            categoryList: list
        })
      this.toggleLarge()
    })
    .catch(e => {
        this.update({
            category: {
                errors: e.errors
            },
            alert: {
                type: "danger",
                text: "Error",
                details: e
            }
        })
    })
}

Mongoose 架构:

const mongoose = require('mongoose');
const uniqueValidator = require('mongoose-unique-validator');

let Schema = mongoose.Schema;

let categorySchema = new Schema({
    description: {
        type: String,
        unique: true,
        required: [true, 'Category required']
    }
});

categorySchema.methods.toJSON = function() {

    let category = this;
    let categoryObject = category.toObject();

    return categoryObject;
}

categorySchema.plugin(uniqueValidator, { message: '{PATH} must be unique' });

module.exports = mongoose.model('Category', categorySchema);

表达方式:

 app.put('/category/:id', [verifyToken], (req, res) => {
    let id = req.params.id;

    Category.findByIdAndUpdate(id, req.body, { new: true, runValidators: true }, (err, categoryDB) => {
        if (err) {
            return res.status(400).json({
                ok: false,
                err
            });
        }
        res.json({
            ok: true,
            category: categoryDB
        });

    })
});

请求负载:

{"description":"Saladitos","errors":{},"_id":"5e5940dd7c567e1891c32cda","__v":0}

响应:

"Validation failed: _id: Cannot read property 'ownerDocument' of null, description: Cannot read property 'ownerDocument' of null"

Answer 1

这是findByIdAndUpdate的契约:

A.findByIdAndUpdate(id, update, options, callback)

您的更新对象是req.body，其中包含_id。我猜测它也会尝试更新 _id，但这是不应该发生的。

尝试指定要更新的列

 Model.findByIdAndUpdate(id, { description: req.body.description, ... }, options, callback)

希望这有帮助。