Trying to get my head around fetching data only once, thought useQuery works like useEffect

When using useQuery I’ve noticed that if I change some state on my component, the query gets rerun as one would expect.

function Index() {
    ...
    const [dialogOpen, setDialogOpen] = useState({ show: false, id: '0' });
    ...   
    const { data, error } = useQuery(GET_JOBS, { suspend: true });
    if (error) {
        return <div>Error! {error.message}</div>;
    }
    const jobs = data.cxJobs; //This is our data
    ....
    function editCallback(e, more) {
        setDialogOpen({ show: true, id: e });
    }
....
}

Since I only want it to happen the first time it renders, I assumed it worked like useffect, and that by adding an empty array to the end of the call: const { data, error } = useQuery(GET_JOBS, { suspend: true }, []); It turns out that’s the not the case. Plus it seems to me there’s no easy way to make that happen with useQuery. You can’t call a hook conditionally.

Do I need to fallback to using the client directly?

[jinshin1013]

You could do something like this. Also, you might also want to avoid setting the result of the query to useState and just use data directly.

const [skip, setSkip] = React.useState(false)
const { loading, data } = useQuery(QUERY, { skip })

React.useEffect(() => {
  // check whether data exists
  if (!loading && !!data) {
    setSkip(true)
  }
}, [data, loading])

if (loading) return <Loading />

// safe to assume data exist
return <Comp jobs={data.cxJobs} />

[vish30]

What if the same query is being used at two different components and I want it to fetch only once and serve it from cache in the other component?