API Documentation / @pinia/colada / defineQuery

Function: defineQuery()

Call Signature

function defineQuery<TResult, TError>(options): () => UseQueryReturn<TResult, TError>;

Define a query with the given options. Similar to useQuery(options) but allows you to reuse the query in multiple places. It only allow static values in options. If you need dynamic values, use the function version.

Type Parameters

TResult

TResult

TError

TError = { custom: Error; }

Parameters

options

DefineQueryOptions<TResult, TError>

the options to define the query

Returns

(): UseQueryReturn<TResult, TError>;

Returns

UseQueryReturn<TResult, TError>

Example

const useTodoList = defineQuery({
  key: ['todos'],
  query: () => fetch('/api/todos', { method: 'GET' }),
})

Call Signature

function defineQuery<T>(setup): () => T;

Define a query with a setup function. Allows to return arbitrary values from the query function, create contextual refs, rename the returned values, etc. The setup function will be called only once, like stores, and must be synchronous.

Type Parameters

T

T

Parameters

setup

() => T

a function to setup the query

Returns

(): T;

Returns

T

Example

const useFilteredTodos = defineQuery(() => {
  const todoFilter = ref<'all' | 'finished' | 'unfinished'>('all')
  const { data, ...rest } = useQuery({
   key: ['todos', { filter: todoFilter.value }],
    query: () =>
      fetch(`/api/todos?filter=${todoFilter.value}`, { method: 'GET' }),
  })
  // expose the todoFilter ref and rename data for convenience
  return { ...rest, todoList: data, todoFilter }
})