node.js - can you identify where i am going wrong

Question

this is my code code and i am trying to update things in raw materials

exports.updateRawmateial = (req, res) => {
    const rawmaterial = req.rawmaterial;
    rawmaterial.name = req.body.name;

    rawmaterial.save((err, updatedRawmaterial) => {
        if (err) {
            return res.status(400).json({
                error: "Unable to Upadte the RawMaterial"
            });
        }
        res.json(updatedRawmaterial);
    });
};

and this is the error I am getting

Cannot set property 'name' of undefined
    at exports.updateRawmateial (C:UserslmtlaOneDriveDesktoppraveenbhaiackendcontrollers
awmaterial.js:45:22)
    at Layer.handle [as handle_request] (C:UserslmtlaOneDriveDesktoppraveenbhaiackend
ode_modulesexpresslib
outerlayer.js:95:5)

question from:https://stackoverflow.com/questions/66060453/can-you-identify-where-i-am-going-wrong

Answer 1

Waitting for answers