requires a callback function but got a [object Undefined] - node.js

Question

I am creating a RESTful API using Node.js , express and My sql. I have created 2 Services,2Routers, and 2 Controllers
App.js module
require("dotenv").config();
const express = require("express");
const app = express();
const userRouter = require("./api/Routers/user.router");
const categoryRouter=require("./api/Routers/category.router");
app.use(express.json());
app.use("/api/users", userRouter);
app.use("/api/category", categoryRouter);
const port = process.env.PORT ;
app.listen(port, () => {
console.log("server up and running on PORT :", port);
});
Category.service.js
const pool = require("../../config/database");
module.exports = {
create: (data, callBack) => {
pool.query(
`insert into category(name, , branch, state, create_date, modified_date)
values(?,?,?,?,?,?)`,
[
data.name,
data.branch,
data.state,
data.create_date,
data.modified_date,
],
(error, results, fields) => {
if (error) {
callBack(error);
}
return callBack(null, results);
}
);
},
getUserByUserEmail: (email, callBack) => {
pool.query(
`select * from registration where email = ?`,
[email],
(error, results, fields) => {
if (error) {
callBack(error);
}
return callBack(null, results[0]);
}
);
},
getCategoryByCategoryId: (id, callBack) => {
pool.query(
`select id,name,branch,state,create_date,modified_date from category where id = ?`,
[id],
(error, results, fields) => {
if (error) {
callBack(error);
}
return callBack(null, results[0]);
}
);
},
getCategory: callBack => {
pool.query(
`select id,name,branch,state,create_date,modified_date from category`,
[],
(error, results, fields) => {
if (error) {
callBack(error);
}
return callBack(null, results);
}
);
},
updateCategory: (data, callBack) => {
pool.query(
`update category set name=?, branch=?, state=?, create_date=?, modified_date=?, `,
[
data.name,
data.branch,
data.state,
data.create_date,
data.modified_date,
],
(error, results, fields) => {
if (error) {
callBack(error);
}
return callBack(null, results[0]);
}
);
},
deleteCategory: (data, callBack) => {
pool.query(
`delete from category where id = ?`,
[data.id],
(error, results, fields) => {
if (error) {
callBack(error);
}
return callBack(null, results[0]);
}
);
}
};
Category.route.js
const router = require("express").Router();
const { checkToken } = require("../../auth/token_validation");
const {
createCategory,
login,
getCreateByCreateId,
getCategory,
updateCategory,
deleteCategory
} = require("../Controllers/category.controller");
router.get("/", checkToken, getCategory);
router.post("/", checkToken, createCategory);
router.get("/:id", checkToken, getCreateByCreateId);
router.post("/login", login);
router.patch("/", checkToken, updateCategory);
router.delete("/", checkToken, deleteCategory);
module.exports = router;
Category.controll.js
const {
create,
getUserByUserEmail,
getCategoryByCategoryId,
getCategory,
updateCategory,
deleteCategory
} = require("../services/category.service");
const { hashSync, genSaltSync, compareSync } = require("bcrypt");
const { sign } = require("jsonwebtoken");
module.exports = {
createUser: (req, res) => {
const body = req.body;
const salt = genSaltSync(10);
body.password = hashSync(body.password, salt);
create(body, (err, results) => {
if (err) {
console.log(err);
return res.status(500).json({
success: 0,
message: "Database connection error"
});
}
return res.status(200).json({
success: 1,
data: results
});
});
},
login: (req, res) => {
const body = req.body;
getUserByUserEmail(body.email, (err, results) => {
if (err) {
console.log(err);
}
if (!results) {
return res.json({
success: 0,
data: "Invalid email or password"
});
}
const result = compareSync(body.password, results.password);
if (result) {
results.password = undefined;
const jsontoken = sign({ result: results }, process.env.JWT_KEY, {
expiresIn: "1h"
});
return res.json({
success: 1,
message: "login successfully",
token: jsontoken
});
} else {
return res.json({
success: 0,
data: "Invalid email or password"
});
}
});
},
getCategoryByCategoryId: (req, res) => {
const id = req.params.id;
getCategoryByCategoryId(id, (err, results) => {
if (err) {
console.log(err);
return;
}
if (!results) {
return res.json({
success: 0,
message: "Record not Found"
});
}
results.password = undefined;
return res.json({
success: 1,
data: results
});
});
},
getCategory: (req, res) => {
getCategory((err, results) => {
if (err) {
console.log(err);
return;
}
return res.json({
success: 1,
data: results
});
});
},
updateCategory: (req, res) => {
const body = req.body;
const salt = genSaltSync(10);
body.password = hashSync(body.password, salt);
updateCategory(body, (err, results) => {
if (err) {
console.log(err);
return;
}
return res.json({
success: 1,
message: "updated successfully"
});
});
},
deleteCategory: (req, res) => {
const data = req.body;
deleteCategory(data, (err, results) => {
console.log(results);
if (err) {
return;
}
if (!results) {
return res.json({
success: 0,
message: "Record Not Found",
h:results
});
}
return res.json({
success: 1,
message: "category deleted not successful"
});
});
}
};
I am getting Error: Route.post() requires a callback function but got a [object Undefined. how can i sort it out
Error: Route.post() requires a callback function but got a [object Undefined] how can I sort this error

Answer 1

createUser should be renamed in createCategory in Category.controll.js