---

name: studio-queries description: React Query conventions for data fetching in Supabase Studio. Use when writing or reviewing query hooks, mutation hooks, or query keys in apps/studio/data/ — including adding the first fetch or mutation for a new API endpoint or resource. Covers queryOptions pattern, keys.ts structure, mutation hook template, and imperative fetching.

Studio Queries & Mutations (React Query)

Follow the patterns in apps/studio/data/. Reference examples:

• Query options: apps/studio/data/table-editor/table-editor-query.ts
• Mutation hook: apps/studio/data/edge-functions/edge-functions-update-mutation.ts
• Keys: apps/studio/data/edge-functions/keys.ts

Query Keys

Define a keys.ts per domain. Export *Keys helpers using array keys with as const. Never inline query keys in components.

export const edgeFunctionsKeys = {
  list: (projectRef: string | undefined) => ['projects', projectRef, 'edge-functions'] as const,
  detail: (projectRef: string | undefined, slug: string | undefined) =>
    ['projects', projectRef, 'edge-function', slug, 'detail'] as const,
}

Query Options (preferred pattern)

Use queryOptions from @tanstack/react-query. This gives type safety and works with both useQuery() and queryClient.fetchQuery().

Rules:

• Export XVariables, XData, and XError types (prefixed with the domain name)
• Implement a private getX(variables, signal?) function:
  • Throws if required variables are missing
  • Passes signal for cancellation
  • Calls handleError(error) on failure (which throws); returns data on success
  • Not exported — use queryClient.fetchQuery(xQueryOptions(...)) for imperative fetching
• Export xQueryOptions() using queryOptions
• Gate with enabled so the query doesn't run until required variables exist
• Platform-only queries: include IS_PLATFORM from lib/constants in enabled
• Don't add extra params to xQueryOptions — callers override by destructuring: { ...xQueryOptions(vars), enabled: true }

import { queryOptions } from '@tanstack/react-query'

import { xKeys } from './keys'
import { get, handleError } from '@/data/fetchers'
import { IS_PLATFORM } from '@/lib/constants'
import { ResponseError } from '@/types'

export type XVariables = { projectRef?: string }
export type XError = ResponseError

async function getX({ projectRef }: XVariables, signal?: AbortSignal) {
  if (!projectRef) throw new Error('projectRef is required')
  const { data, error } = await get('/v1/projects/{ref}/x', {
    params: { path: { ref: projectRef } },
    signal,
  })
  if (error) handleError(error)
  return data
}

export type XData = Awaited<ReturnType<typeof getX>>

export const xQueryOptions = ({ projectRef }: XVariables) =>
  queryOptions({
    queryKey: xKeys.list(projectRef),
    queryFn: ({ signal }) => getX({ projectRef }, signal),
    enabled: IS_PLATFORM && typeof projectRef !== 'undefined',
  })

Using Query Options in Components

import { useQuery } from '@tanstack/react-query'

import { xQueryOptions } from '@/data/x/x-query'

const { data, isPending, isError } = useQuery(xQueryOptions({ projectRef: project?.ref }))

Imperative Fetching (outside React or in callbacks)

const queryClient = useQueryClient()
const { data: project } = useSelectedProjectQuery()

const handleClick = useCallback(
  async (id: number) => {
    const data = await queryClient.fetchQuery(xQueryOptions({ id, projectRef: project?.ref }))
    // use data...
  },
  [project?.ref, queryClient]
)

Mutation Hook

• Export a Variables type with projectRef, identifiers, and payload
• Implement a private updateX(vars) function with required variable validation and handleError
• Wrap in useXMutation():
  • Accepts UseMutationOptions (omit mutationFn)
  • Invalidates list() + detail() keys in onSuccess with await Promise.all([...])
  • Defaults to toast.error(...) when onError isn't provided

import { useMutation, UseMutationOptions, useQueryClient } from '@tanstack/react-query'
import toast from 'react-hot-toast'

import { xKeys } from './keys'

type XUpdateVariables = { projectRef: string; slug: string; payload: XPayload }

export const useXUpdateMutation = ({
  onSuccess,
  onError,
  ...options
}: UseMutationOptions<XData, XError, XUpdateVariables> = {}) => {
  const queryClient = useQueryClient()
  return useMutation({
    mutationFn: updateX,
    async onSuccess(data, variables, context) {
      await Promise.all([
        queryClient.invalidateQueries({
          queryKey: xKeys.detail(variables.projectRef, variables.slug),
        }),
        queryClient.invalidateQueries({ queryKey: xKeys.list(variables.projectRef) }),
      ])
      await onSuccess?.(data, variables, context)
    },
    async onError(error, variables, context) {
      if (onError === undefined) toast.error(`Failed to update: ${error.message}`)
      else onError(error, variables, context)
    },
    ...options,
  })
}

Component Usage

• Use React Query v5 flags: isPending for initial load, isFetching for background refetches
• Render states explicitly in order: pending → error → success