**I have a billing form and in this i have some product details that admin can fill these details but 1 field called "BillID" i want to directly pass a variable to it that contain 'Bill ID + 1' value as a default value.
**This is My Code:-
const [BillIdFetch, setBillIdFetch] = useState();
useEffect(() => {
axios.get("http://localhost:5000/getLastBill_Id").then(( res ) => {
setBillIdFetch(res.data[0].Bill_Id + 1);
});
}, []);
console.log("===>>>> Testing BillIdFetch ",BillIdFetch) //**I check in this variable value stored perfectly.
const [Product_Details, setProduct_Details] = useState([
{
index: Math.random(),
billId : BillIdFetch, //**I want 'BllIdFetch' value pass to this state variable.
prodId: "",
qty: "",
price: "",
prod_SrNo: "",
discount_price: "",
proData_warranty: "",
},
]);
In 'BillIdFetch' i got correct id + 1 value and i also use this value for displaying Bill no. in form column. but when i set this value to 'billId' it shows like this :- {billId: undefined}
This is post request to the server.
In this a pass 'Produt_Details' array of object to it.
const config = {
header: {
"Content type": "appication/json",
},
};
const { data } = await axios.post(
"http://localhost:5000/billing_data",
{ p_value: Product_Details },
config
);
What you need to do is to check when BillIdFetch changes, and then set the correct state value for Product_Details. In your current code, the code for setting the value of Product_Details? will run before the fetching.
To solve this, use a useEffect hook with BillIdFetch as a dependency, thus, this code will run when BillIdFetch changes.
It could look something like this:
const [Product_Details, setProduct_Details] = useState([]);
const [BillIdFetch, setBillIdFetch] = useState();
useEffect(() => {
axios.get("http://localhost:5000/getLastBill_Id").then(( res ) => {
setBillIdFetch(res.data[0].Bill_Id + 1);
});
}, []);
useEffect(() => {
if (billIdFetch === undefined) return;
setProduct_Details([{
index: Math.random(),
billId : BillIdFetch,
prodId: "",
qty: "",
price: "",
prod_SrNo: "",
discount_price: "",
proData_warranty: "",
}])
}, [billIdFetch])