React code
import React, { useEffect, useState } from "react";
import { getDocs, collection } from "firebase/firestore";
import { auth, db } from "../firebase-config";
import { useNavigate } from "react-router-dom";
function Load() {
const navigate = useNavigate();
const [accountList, setAccountList] = useState([]);
const [hasEmail, setHasEmail] = useState(false);
const accountRef = collection(db, "accounts");
Am i using useEffect correctly?
useEffect(() => {
const getAccounts = async () => {
const data = await getDocs(accountRef);
setAccountList(
data.docs.map((doc) => ({
...doc.data(),
id: doc.id,
}))
);
};
getAccounts();
emailCheck();
direct();
}, []);
checking whether email exists
const emailCheck = () => {
if (accountList.filter((e) => e.email === auth.currentUser.email)) {
setHasEmail(true);
} else {
setHasEmail(false);
}
};
Redirecting based on current user
const direct = () => {
if (hasEmail) {
navigate("/index");
} else {
navigate("/enterdetails");
}
};
return <div></div>;
}
The code compiles but doesn't redirect properly to any of the pages. What changes should I make? First question posted excuse me if format is wrong.
There are two problems here:
useEffect(() => {
const getAccounts = async () => {
const data = await getDocs(accountRef);
setAccountList(
data.docs.map((doc) => ({
...doc.data(),
id: doc.id,
}))
);
};
getAccounts();
emailCheck();
direct();
}, []);
In order:
getAccounts
is asynchronous, you need to use await
when calling it.getAccounts
completes - even when you use await
when calling it. If you don't use the accountList
for rendering UI, you should probably get rid of it as a useState
hook altogether, and just use regular JavaScript variables to pass the value around.
But even if you use it in the UI, you'll need to use different logic to check its results. For example, you could run the extra checks inside the getAccounts
function and have them use the same results as a regular variable:
useEffect(() => {
const getAccounts = async () => {
const data = await getDocs(accountRef);
const result = data.docs.map((doc) => ({
...doc.data(),
id: doc.id,
}));
setAccountList(result);
emailCheck(result);
direct();
};
getAccounts();
}, []);
const emailCheck = (accounts) => {
setHasEmail(accounts.some((e) => e.email === auth.currentUser.email));
};
Alternatively, you can use a second effect that depends on the accountList
state variable to perform the check and redirect:
useEffect(() => {
const getAccounts = async () => {
const data = await getDocs(accountRef);
setAccountList(
data.docs.map((doc) => ({
...doc.data(),
id: doc.id,
}))
);
};
getAccounts();
});
useEffect(() => {
emailCheck();
direct();
}, [accountList]);
Now the second effect will be triggered each time the accountList
is updated in the state.
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