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Mongodb – Error when using required field in schema in mongoose

//controller:

const Product = require("../models/productModel");
//Create product
exports.createProduct = async (req, res, next) => {
  const product = await Product.create(req.body);

  res.status(201).json({
    success: true,
    product,
  });
};

productModel.js:

const mongoose = require("mongoose");
const productSchema = new mongoose.Schema({
  name: {
    type: String,
    required: true,//err here.
  },
})

There is an answer at link but those do not fix my error.

Here is the request that I send:
http://localhost:4000/api/v1/product/new (POST request with JSON content)
JSON:

{
    "name":"Vaseline petrolatum Jelly"
}

The above code gives the below error:
this.$__.validationError = new ValidationError(this);
^

ValidationError: Product validation failed: name: Path name is required.
at Document.invalidate (C:UsersDELLDownloadsreact-learnnode_modulesmongooselibdocument.js:3289:32)
at C:UsersDELLDownloadsreact-learnnode_modulesmongooselibdocument.js:3050:17
at C:UsersDELLDownloadsreact-learnnode_modulesmongooselibschemaType.js:1388:9
at process.processTicksAndRejections (node:internal/process/task_queues:77:11) {
errors: {
name: ValidatorError: Path name is required.
at validate (C:UsersDELLDownloadsreact-learnnode_modulesmongooselibschemaType.js:1385:13)
at SchemaType.doValidate (C:UsersDELLDownloadsreact-learnnode_modulesmongooselibschemaType.js:1369:7)
at C:UsersDELLDownloadsreact-learnnode_modulesmongooselibdocument.js:3042:18
at process.processTicksAndRejections (node:internal/process/task_queues:77:11) {
properties: {
validator: [Function (anonymous)],
message: ‘Path name is required.’,
type: ‘required’,
path: ‘name’,
fullPath: undefined,
value: undefined
},
kind: ‘required’,
path: ‘name’,
value: undefined,
reason: undefined,
[Symbol(mongoose#validatorError)]: true
}
},
_message: ‘Product validation failed’
}

I tried the solutions at link but none of them worked for me.

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    I used express.json() in app.js but it was down below another line:

    const express = require("express");
const app = express();
app.use(express.json());
const product = require("./routes/productRoute");
app.use("/api/v1", product);
//it was previously here somewhere.
module.exports = app;

  2. 0

    The error message you’re encountering, "ValidationError: Product validation failed: name: Path name is required," indicates that Mongoose is not receiving the name field from the request body as expected.

    1. Ensure Body Parsing Middleware is Used:
      In your Express app setup, ensure you have the following middleware to parse JSON request bodies:
    const express = require('express');
const app = express();
app.use(express.json()); // To parse JSON bodies
    1. Check the Controller and Model Code:
      Your controller and model code seem to be correct, but let’s add error handling to the controller to log the request body.
    const Product = require("../models/productModel");

exports.createProduct = async (req, res, next) => {
  try {
    console.log('Request Body:', req.body); // Log the request body for debugging
    const product = await Product.create(req.body);

    res.status(201).json({
      success: true,
      product,
    });
  } catch (error) {
    console.error('Error creating product:', error);
    res.status(400).json({
      success: false,
      message: error.message,
    });
  }
};
    1. Verify Request:
      Make sure that your POST request to http://localhost:4000/api/v1/product/new is correctly formatted and contains the Content-Type: application/json header.

    Example using curl:

    curl -X POST http://localhost:4000/api/v1/product/new 
-H "Content-Type: application/json" 
-d '{"name": "Vaseline petrolatum Jelly"}'
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