Drizzle Team•2y ago

Is there a way to save the generated response Type from a query?

I see that when you hover over the type for the response of a query, you can see what data will be returned. Is there a way to extract, or save that Type somehow, so I can use it elsewhere?

7 Replies

Jökull Sólberg•2y ago

ReturnType<typeof query.run> ?

CoryOP•2y ago

Yes thank you this is perfect!! Weird for some reason trying this now, it does not work? Giving a type error, something about not satisifying the contraint provides no match for the signature '(...args: any): any'

Jökull Sólberg•2y ago

Can you share the code? It's probably not a function that's being passed to ReturnType

CoryOP•2y ago

sure:

export const getItemOrder = db.query.item
  .findFirst({
    columns: {
      itemOrder: true
    },
    where: and(eq(item.id, placeholder('id')), eq(item.orgId,  placeholder('orgId')))
   }).prepare();

type exampleType = ReturnType<typeof getItemOrder>;

export const getItemOrder = db.query.item
  .findFirst({
    columns: {
      itemOrder: true
    },
    where: and(eq(item.id, placeholder('id')), eq(item.orgId,  placeholder('orgId')))
   }).prepare();

type exampleType = ReturnType<typeof getItemOrder>;

Jökull Sólberg•2y ago

leave .prepare() out of the variable and call it like this getItemOrder.prepare() typeof basically "yanks" a runtime thing into the type level above it (that's how I think about it) so if you call typeof on a function you wrap it in returntype to get the return of the function --- however in your case above you're calling returntype on a result, not a function so you don't need it, just leave it out

CoryOP•2y ago

hmm this sort of works but gives me the actually execution as the type, not the result really

Jökull Sólberg•2y ago

Screenshot of hover?

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Is there a way to save the generated response Type from a query?