pinia-colada-skilld

name	pinia-colada-skilld
description	The smart data fetching layer for Vue.js. ALWAYS use when writing code importing "@pinia/colada". Consult for debugging, best practices, or modifying @pinia/colada, pinia/colada, pinia colada, pinia-colada.
metadata	{"version":"1.2.1","generated_at":"2026-04-29T00:00:00.000Z","references_synced_at":"2026-04-29T00:00:00.000Z"}

posva/pinia-colada @pinia/colada@1.2.1

Tags: latest: 1.2.1

References: Docs

API Changes

This section documents version-specific API changes — prioritize recent major/minor releases.

• BREAKING: useInfiniteQuery() — v0.20.0 refactored: removed merge, changed data to { pages, pageParams }, initialPage → initialPageParam, loadMore → loadNextPage, and getNextPageParam is now required (experimental) source

• BREAKING: PiniaColada installation — v0.14.0 moved global options to queryOptions: { ... } and requires an options object for typing: app.use(PiniaColada, {}) source

• BREAKING: useQuery() aliases — isFetching was renamed to isLoading in v0.8.0 to better reflect its connection to asyncStatus source

• BREAKING: Status split — v0.8.0 split status into status (data: 'pending'|'success'|'error') and asyncStatus (operation: 'idle'|'loading') source

• BREAKING: Mutation IDs — v0.19.0 simplified mutation IDs to incremented numbers (starting at 1). mutationCache.get() now takes the ID, and $n suffix is removed from keys source

• BREAKING: Cache Key structure — v0.16.0 refactored internal cache to support deeply nested objects for keys. toCacheKey now returns a plain string. Stricter types disallow undefined in keys source

• BREAKING: queryCache method renames — cancelQuery() was renamed to cancel() in v0.11.0, and cancelQueries() was added for multiple cancellations source

• BREAKING: setQueryState → setEntryState — v0.9.0 renamed this queryCache action to better match its purpose source

• BREAKING: External AbortError — v0.18.0 now surfaces external abort signals as actual errors instead of silently ignoring them source

• BREAKING: placeholderData types — v0.13.0 changed placeholderData to only allow returning undefined (not null) to improve type inference source

• BREAKING: Devtools dependency — v0.21.0 removed built-in @vue/devtools-api dependency; use @pinia/colada-devtools instead source

• NEW: useInfiniteQuery() — v0.13.5 introduced infinite scrolling support (experimental) source

• NEW: useQueryState() — v0.17.0 added this for easier state management without the full useQuery return object source

• NEW: Global Query Hooks — v0.8.0 introduced PiniaColadaQueryHooksPlugin to manage onSuccess, onError, and onSettled source

Also changed: serializeTreeMap replaces serialize v0.14.0 · transformError removed v0.12.0 · EntryKey replaces EntryNodeKey v0.17.0 · TResult renamed TData v0.16.0 · QueryPlugin → PiniaColada v0.8.0 · delayLoadingRef removed v0.12.0 · invalidateKeys moved to plugin v0.10.0

Best Practices

• Use the grouped state object for type-safe narrowing in templates — TypeScript cannot narrow destructured data or error refs based on the status ref due to Vue's Ref wrapper limitations source

<script setup lang="ts">
const { state } = useQuery({ key: ['user'], query: fetchUser })
</script>

<template>
  <div v-if="state.status === 'success'">{{ state.data.name }}</div>
  <div v-else-if="state.status === 'error'">{{ state.error.message }}</div>
</template>

• Wrap shared reactive state in defineQuery() to prevent desynchronization — regular composables recreate refs for each component instance, causing only the first component to successfully trigger key-based reactivity source

export const useFilteredTodos = defineQuery(() => {
  const search = ref('')
  const query = useQuery({
    key: () => ['todos', { search: search.value }],
    query: () => fetchTodos(search.value),
  })
  return { ...query, search }
})

• Combine hierarchical key factories with defineQueryOptions() for strict type safety — this enables automatic type inference in queryCache methods without manual type casting or string-based key typos source

export const todoOptions = defineQueryOptions((id: string) => ({
  key: ['todos', id],
  query: () => fetchTodo(id),
}))
// Inferred TData: queryCache.getQueryData(todoOptions('1').key)

• Handle side effects via watch or global plugins instead of query options — useQuery intentionally lacks onSuccess/onError to prevent side-effect duplication across multiple component instances source

• Prefer refresh() over refetch() for standard UI updates — refresh() respects staleTime and deduplicates in-flight requests, whereas refetch() forces a network call regardless of cache status source

• Use the meta property for declarative cross-cutting concerns — attach metadata to queries to drive global UI behavior (like toast messages) within the PiniaColadaQueryHooksPlugin source

• Verify cache state before performing optimistic rollbacks — always check if the current cache value matches the optimistic value in onError to avoid overwriting concurrent successful updates from other mutations source

onError(err, vars, { newTodo, oldTodo }) {
  if (newTodo === queryCache.getQueryData(['todos'])) {
    queryCache.setQueryData(['todos'], oldTodo)
  }
}

• Use queryCache.setEntryState() for manual status synchronization — this is the preferred way to manually update an entry as setting data to undefined via setQueryData() is no longer supported for state resets source

• Explicitly import useRoute from vue-router in Nuxt defineQuery definitions — the Nuxt auto-imported version can cause unnecessary query triggers or undefined values due to Suspense integration source

• Use the enabled getter to guard "immortal" queries in global stores — prevents queries inside Pinia stores from making invalid network requests when required reactive parameters (like route params) are absent source

const result = useQuery({
  key: () => ['deck', route.params.id],
  query: () => fetchDeck(route.params.id),
  enabled: () => !!route.params.id,
})