[英]React hook form useEffect not re-rendering functional component with call to another component
我正在嘗試使用 react-hook-forms 來做一個反應表單,但我無法呈現從 API 調用中檢索到的數據。
我已經將這個處理異步設置表單值的示例和處理嵌套 arrays 的示例結合起來。
但是對於我的一生,我根本無法讓它發揮作用。 API 的 JSON output 是這樣的:
{"daily": { "last_received_date": "2020-08-03 11:04:18 UTC+8", "tasks": [
{ "id": "1", "freq": "d", "prog": 0, "max": 5, "reward": 1000 },
{ "id": "2", "freq": "d", "prog": 0, "max": 1, "reward": 1000 },
{ "id": "3", "freq": "d", "prog": 0, "max": 3, "reward": 1000 }]},
"weekly": {/*Similar to daily*/}}
這是功能組件:
const UserTaskForm = (data) => {
const [TaskId, setTaskId] = useState();
const [TaskArray, setChallengeArray] = useState([]);
const { register, control, handleSubmit, getValues, reset, errors } = useForm();
const onSubmit = (formData) => {console.log(formData);};
useEffect(() => {
async function fetchData() {
try {
let result = await dbGetUserTasks(data.userId);
console.log(result);
const tempArray = [];
const formData = JSON.parse(result[0].challenges);
tempArray.push(formData.daily);
tempArray.push(formData.weekly);
setTaskId(JSON.parse(result[0].id));
setChallengeArray(tempArray);
} catch (error) { console.error(error); }
}
fetchData();
}, []);
return (
<form onSubmit={handleSubmit(onSubmit)}>
<Box paddingTop={2} paddingBottom={2}>
<Button type="submit" style={{ marginLeft: "auto" }}>Save Changes</Button>
</Box>
{TaskArray ? <Spinner animation="border" /> : <TaskTypeCards{...{ control, register, TaskArray, getValues, errors }} />}
</form>
);
}
export default UserTaskForm;
這是調用的功能組件:
export default function TaskTypeCards({ control, register, defaultValues, errors }) {
console.log(defaultValues); // <--------------- Undefined.
const { fields, append, remove } = useFieldArray({ control, name: "test" });
useEffect(() => {
console.log(defaultValues); // <--------------- Undefined.
}, [defaultValues])
return(
{defaultValues.map((challenge, index) => {
return (
<Card>
Blah blah this doesn't work anyway
</Card>
)
})}
)
}
我知道組件是在UserTaskForm
中觸發 useEffect 之前渲染的,但是我如何重新渲染它,這樣TaskTypeCards
中的defaultValues
不會注銷undefined
?
defaultValues
需要作為 props 傳遞,以便在 TaskTypeCards 組件中將其作為 props 接收。
謝謝
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