CRUD-我无法将特定数据发送到数据库

我正在尝试插入一个类别，并且它没有将其“名称”发送到数据库。在Postman和Robo Mongo上，我看到我正确发送了“ _id”，“ createdAt”，“ updatedAt”和“ _V”。但是“名称”没有发送。有人知道发生了什么吗？谢谢。

app.js

const express = require('express')
const mongoose = require('mongoose')
const morgan = require('morgan')
const bodyParser = require('body-parser') 
const cookieParser = require('cookie-parser')
const expressValidator = require('express-validator')  
require('dotenv').config()
//import routes
const authRoutes =  require('./routes/auth')
const userRoutes =  require('./routes/user')
const categoryRoutes =  require('./routes/category')

// app
const app = express()

// db
mongoose.connect(process.env.DATABASE, {
  useNewUrlParser: true,
  useCreateIndex: true
})
.then(() => console.log('DB Connected'))

// middlewares
app.use(morgan('dev'))
app.use(bodyParser.json())
app.use(cookieParser())
app.use(expressValidator())

// routes middleware
app.use('/api', categoryRoutes)

const port = process.env.PORT || 8000

app.listen(port, () => {
  console.log(`Server is running on port ${port}`)
})

控制器/category.js

const Category = require("../models/category")
const { errorHandler } = 
require("../helpers/dbErrorHandler")

exports.create = (req, res) => {
  const category = new Category(req.body)  
  category.save((err, data) => {   
    if(err) {
      return res.status(400).json({
        error: errorHandler(err)      
      })
    }
    res.json({ data })  
  })
}

路线/类别

const express = require('express')
const router = express.Router()

const { create } = require('../controllers/category')
    
router.post('/category/create/:userId', create);

router.param("userId", userById)

module.exports = router

型号/类别

const mongoose = require('mongoose')

const categorySchema = new mongoose.Schema(
  {
    name: {
      type: String,
      trim: true,
      required: false,
      maxlength: 32
    }
  },
  { timestamps: true }
);

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