TanStackT
TanStack3y ago
7 replies
conventional-black

error while using react-query prefetching and SSR in nextJs with Shadcn/ui

Hello, I'm creating a data-table component with shadcn/ui and I've noticed that when when I try to fetch the data and pass it to component It takes a little while to render, since the component takes a data prop of type <Stock[]>, but the data returned by the query adds an undefined type to it so I have to wait until Its successful then pass it to the component.
So I thought If of prefetching the query according to the docs to make it a little faster, but I get this error in the console and nothing changed pretty much.
Here is the code to the important files (since the post is too long I had to put in a file) and the error from the console:

the error:
Query data cannot be undefined. Please make sure to return a value other than undefined from your query function. Affected query key: ["stock"]

Warning: Encountered two children with the same key, `0`. Keys should be unique so that components maintain their identity across updates. Non-unique keys may cause children to be duplicated and/or omitted — the behavior is unsupported and could change in a future version.

Warning: Encountered two children with the same key, `1`. Keys should be unique so that components maintain their identity across updates. Non-unique keys may cause children to be duplicated and/or omitted — the behavior is unsupported and could change in a future version.
code_1.txt2.34KB
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