How to POST and GET from mongoDB express server in react hooks? - node.js

Question

I am getting an error to GET data from my API endpoint.
I am able to send data and also update/ delete them from the postTodo()method.
I have added it in a useEffect()so that the I am able to send data to server whenever a Todo is completed or deleted.
But whenever i reload the page, in the devtools, the todos array is [].
Some help would be appreciated.Thanks.
The Todo.jsx
const postTodo = (todos) => {
console.log(todos);
axios.post("http://localhost:4000/api/todos", todos, {
headers: {
"Content-Type": "application/json",
"Authorization": `Bearer ${token}`,
}
})
.then(res => {
console.log(res);
})
.catch(err => {
console.log(err);
})
}
useEffect(() => {
postTodo(todos)
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [todos])
useEffect(() => {
axios.get("http://localhost:4000/api/todos", {
headers: {
"Content-Type": "application/json",
"Authorization": `Bearer ${token}`,
}
})
.then(res => {
console.log(res);
setTodos(res.data.todos)
})
.catch(err => {
console.log(err);
})
}, [])
the server.js
const authCheck = (req, res, next) => {
if (req.headers['authorization']) {
const token = req.headers['authorization'].split(" ")
if (token[0] !== 'Bearer') {
return res.send({ status: 'error', error: 'invalid request' });
} else {
req.jwt = jwt.verify(token[1], process.env.jwtSECRET);
return next();
}
}
}
app.post("/api/todos", authCheck, async (req, res) => {
const todos = req.body
console.log(todos);
const { id } = req.jwt
const user = await User.findByIdAndUpdate(id, { "todos": todos })
// console.log(user);
})
app.get("/api/todos", authCheck, async (req, res) => {
const { id } = req.jwt
const user = await User.findById(id)
log(user) //user.todos is empty
res.send({
status: "ok", todos: user.todos })
})

Answer 1

You can try something like this, where use effect for todos will log the value everytime you create a new todo
const postTodo = (todos) => {
console.log(todos);
axios.post("http://localhost:4000/api/todos", todos, {
headers: {
"Content-Type": "application/json",
"Authorization": `Bearer ${token}`,
}
})
.then(res => {
console.log(res);
getTodos()
})
.catch(err => {
console.log(err);
})
}
const getTodos = () => {
axios.get("http://localhost:4000/api/todos", {
headers: {
"Content-Type": "application/json",
"Authorization": `Bearer ${token}`,
}
})
.then(res => {
console.log(res);
setTodos(res.data.todos)
})
.catch(err => {
console.log(err);
})
}
const newTodo = () => {
const allTodos = [...todos];
allTodos.push("new Todo at:" + new Date())
postTodo(allTodos)
}
useEffect(() => {
console.log('todo-list', todos)
// eslint-disable-next-line react-hooks/exhaustive-deps
}, [todos])
useEffect(() => {
getTodos()
}, [])
return (<button onClick={() => }> Add Todo </button>)

Answer 2

The problem was solved,
actually it was the useEffect() issue.
I removed the UseEffect
and added the postTodos method after every useState hook updation.