Theo's Typesafe Cult•2y ago

How do I set the default useState value of a trpc call?

EDIT: Sorry apparently I can't rename the title. I meant to say: 'How do I set a default useState value to something that came from a trpc call' Hi folks, so I need some help with my component It's a simple team switcher. I need help understanding a few things. I have two main trpc endpoints: getAllForLoggedUser and switchActiveWorkspace. one thing: whenever I am reloading this component fresh new, I am not being able to set the default value of the useState call. The default value is not being set. How can I make it so it sets the default value that came from the trpc call

export default function TeamSwitcher({ className }: TeamSwitcherProps) {
  const ctx = api.useContext();
  const { data: session } = useSession();

  const { data: workspaces } = api.workspace.getAllForLoggedUser.useQuery(
    undefined,
    {
      enabled: session?.user !== undefined,
    }
  );

  const { mutateAsync } = api.user.switchActiveWorkspace.useMutation({
    onSuccess: () => {
      void ctx.workspace.getAllForLoggedUser.invalidate();
    },
  });

  const [selectedWS, setSelectedWS] = React.useState<Workspace>({
    id: session?.user?.activeWorkspaceId || "",
    name:
      workspaces?.find((w) => w.id === session?.user?.activeWorkspaceId)
        ?.name || "", //This was supposed to be working 🥲
  });

  return (
    {/*tsx Code.
      At some point there is a mapping of the workspaces array and on each item there is a onSelect like this
      onSelect={() => {
                      setSelectedWS({
                        id: ws.id,
                        name: ws.name,
                      });
                      setOpen(false);
                      void mutateAsync({ workspaceId: ws.id });
                    }}
  */}
  )
}

export default function TeamSwitcher({ className }: TeamSwitcherProps) {
  const ctx = api.useContext();
  const { data: session } = useSession();

  const { data: workspaces } = api.workspace.getAllForLoggedUser.useQuery(
    undefined,
    {
      enabled: session?.user !== undefined,
    }
  );

  const { mutateAsync } = api.user.switchActiveWorkspace.useMutation({
    onSuccess: () => {
      void ctx.workspace.getAllForLoggedUser.invalidate();
    },
  });

  const [selectedWS, setSelectedWS] = React.useState<Workspace>({
    id: session?.user?.activeWorkspaceId || "",
    name:
      workspaces?.find((w) => w.id === session?.user?.activeWorkspaceId)
        ?.name || "", //This was supposed to be working 🥲
  });

  return (
    {/*tsx Code.
      At some point there is a mapping of the workspaces array and on each item there is a onSelect like this
      onSelect={() => {
                      setSelectedWS({
                        id: ws.id,
                        name: ws.name,
                      });
                      setOpen(false);
                      void mutateAsync({ workspaceId: ws.id });
                    }}
  */}
  )
}

7 Replies

gybia•2y ago

Here's the full code if needed

gybia•2y ago

message.txt

Neto•2y ago

put the useState above the queries onSuccess of the query, update the state

export default function TeamSwitcher({ className }: TeamSwitcherProps) {
  const ctx = api.useContext();
  const { data: session } = useSession();

  const [selectedWS, setSelectedWS] = React.useState<some_type>({
    id: session?.user?.activeWorkspaceId || "",
    name:
      workspaces?.find((w) => w.id === session?.user?.activeWorkspaceId)
        ?.name || "", //This was supposed to be working 🥲
  });


  const { data: workspaces } = api.workspace.getAllForLoggedUser.useQuery(
    undefined,
    {
      enabled: session?.user !== undefined,
      onSuccess: (data) => {
        const newSelectedWS = some_logic_goes_where
        setSelectedWS(newSelectedWS)
      }
    }
  );

  const { mutateAsync } = api.user.switchActiveWorkspace.useMutation({
    onSuccess: () => {
      void ctx.workspace.getAllForLoggedUser.invalidate();
    },
  });


  return (
   <></>
  )
}

export default function TeamSwitcher({ className }: TeamSwitcherProps) {
  const ctx = api.useContext();
  const { data: session } = useSession();

  const [selectedWS, setSelectedWS] = React.useState<some_type>({
    id: session?.user?.activeWorkspaceId || "",
    name:
      workspaces?.find((w) => w.id === session?.user?.activeWorkspaceId)
        ?.name || "", //This was supposed to be working 🥲
  });


  const { data: workspaces } = api.workspace.getAllForLoggedUser.useQuery(
    undefined,
    {
      enabled: session?.user !== undefined,
      onSuccess: (data) => {
        const newSelectedWS = some_logic_goes_where
        setSelectedWS(newSelectedWS)
      }
    }
  );

  const { mutateAsync } = api.user.switchActiveWorkspace.useMutation({
    onSuccess: () => {
      void ctx.workspace.getAllForLoggedUser.invalidate();
    },
  });


  return (
   <></>
  )
}

gybia•2y ago

@Neto But this way, workspace (where the useState is invoked) will be used before it's being defined. OOh I see what you mean

Neto•2y ago

if the state is derived from the query you can make a "blank" state and update when the query finishes

gybia•2y ago

This fixed it!! Thank you so much ❤️

whatplan•2y ago

while this does work its probably not ideal: https://tkdodo.eu/blog/breaking-react-querys-api-on-purpose

Breaking React Query's API on purpose

Why good API design matters, even if it means breaking existing APIs in the face of resistance.

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How do I set the default useState value of a trpc call?