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feat(nuxt3): let useAsyncData() return value that error can defined type by generics (#4109)

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Alex Liu 2022-04-07 00:02:45 +08:00 committed by GitHub
parent 8284e7fa21
commit b7dc0931c4
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3 changed files with 27 additions and 9 deletions
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2
docs/content/3.api/1.composables/use-async-data.md
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@ -8,7 +8,7 @@ const {
data: Ref<DataT>,
pending: Ref<boolean>,
refresh: () => Promise<void>,
error?: any
error: Ref<any>
} = useAsyncData(
key: string,
handler: (ctx?: NuxtApp) => Promise<Object>,

18
packages/nuxt3/src/app/composables/asyncData.ts
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@ -28,26 +28,27 @@ export interface RefreshOptions {
_initial?: boolean
}
export interface _AsyncData<DataT> {
export interface _AsyncData<DataT, ErrorT> {
data: Ref<DataT>
pending: Ref<boolean>
refresh: (opts?: RefreshOptions) => Promise<void>
error?: any
error: Ref<ErrorT>
}
export type AsyncData<Data> = _AsyncData<Data> & Promise<_AsyncData<Data>>
export type AsyncData<Data, Error> = _AsyncData<Data, Error> & Promise<_AsyncData<Data, Error>>
const getDefault = () => null
export function useAsyncData<
DataT,
DataE = any,
Transform extends _Transform<DataT> = _Transform<DataT, DataT>,
PickKeys extends KeyOfRes<Transform> = KeyOfRes<Transform>
> (
key: string,
handler: (ctx?: NuxtApp) => Promise<DataT>,
options: AsyncDataOptions<DataT, Transform, PickKeys> = {}
): AsyncData<PickFrom<ReturnType<Transform>, PickKeys>> {
): AsyncData<PickFrom<ReturnType<Transform>, PickKeys>, DataE> {
// Validate arguments
if (typeof key !== 'string') {
throw new TypeError('asyncData key must be a string')
@ -87,7 +88,7 @@ export function useAsyncData<
data: ref(nuxt.payload.data[key] ?? options.default()),
pending: ref(!useInitialCache()),
error: ref(nuxt.payload._errors[key] ?? null)
} as AsyncData<DataT>
} as AsyncData<DataT, DataE>
asyncData.refresh = (opts = {}) => {
// Avoid fetching same key more than once at a time
@ -164,21 +165,22 @@ export function useAsyncData<
}
// Allow directly awaiting on asyncData
const asyncDataPromise = Promise.resolve(nuxt._asyncDataPromises[key]).then(() => asyncData) as AsyncData<DataT>
const asyncDataPromise = Promise.resolve(nuxt._asyncDataPromises[key]).then(() => asyncData) as AsyncData<DataT, DataE>
Object.assign(asyncDataPromise, asyncData)
return asyncDataPromise as AsyncData<PickFrom<ReturnType<Transform>, PickKeys>>
return asyncDataPromise as AsyncData<PickFrom<ReturnType<Transform>, PickKeys>, DataE>
}
export function useLazyAsyncData<
DataT,
DataE = any,
Transform extends _Transform<DataT> = _Transform<DataT, DataT>,
PickKeys extends KeyOfRes<Transform> = KeyOfRes<Transform>
> (
key: string,
handler: (ctx?: NuxtApp) => Promise<DataT>,
options: Omit<AsyncDataOptions<DataT, Transform, PickKeys>, 'lazy'> = {}
): AsyncData<PickFrom<ReturnType<Transform>, PickKeys>> {
): AsyncData<PickFrom<ReturnType<Transform>, PickKeys>, DataE> {
return useAsyncData(key, handler, { ...options, lazy: true })
}

16
test/fixtures/basic/types.ts vendored
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@ -17,6 +17,22 @@ describe('API routes', () => {
expectTypeOf($fetch<TestResponse>('/test')).toMatchTypeOf<Promise<TestResponse>>()
})
it('works with useAsyncData', () => {
expectTypeOf(useAsyncData('api-hello', () => $fetch('/api/hello')).data).toMatchTypeOf<Ref<string>>()
expectTypeOf(useAsyncData('api-hey', () => $fetch('/api/hey')).data).toMatchTypeOf<Ref<{ foo:string, baz: string }>>()
expectTypeOf(useAsyncData('api-hey-with-pick', () => $fetch('/api/hey'), { pick: ['baz'] }).data).toMatchTypeOf<Ref<{ baz: string }>>()
expectTypeOf(useAsyncData('api-other', () => $fetch('/api/other')).data).toMatchTypeOf<Ref<unknown>>()
expectTypeOf(useAsyncData<TestResponse>('api-generics', () => $fetch('/test')).data).toMatchTypeOf<Ref<TestResponse>>()
expectTypeOf(useAsyncData<any, string>('api-error-generics', () => $fetch('/test')).error).toMatchTypeOf<Ref<string>>()
expectTypeOf(useLazyAsyncData('lazy-api-hello', () => $fetch('/api/hello')).data).toMatchTypeOf<Ref<string>>()
expectTypeOf(useLazyAsyncData('lazy-api-hey', () => $fetch('/api/hey')).data).toMatchTypeOf<Ref<{ foo:string, baz: string }>>()
expectTypeOf(useLazyAsyncData('lazy-api-hey-with-pick', () => $fetch('/api/hey'), { pick: ['baz'] }).data).toMatchTypeOf<Ref<{ baz: string }>>()
expectTypeOf(useLazyAsyncData('lazy-api-other', () => $fetch('/api/other')).data).toMatchTypeOf<Ref<unknown>>()
expectTypeOf(useLazyAsyncData<TestResponse>('lazy-api-generics', () => $fetch('/test')).data).toMatchTypeOf<Ref<TestResponse>>()
expectTypeOf(useLazyAsyncData<any, string>('lazy-error-generics', () => $fetch('/test')).error).toMatchTypeOf<Ref<string>>()
})
it('works with useFetch', () => {
expectTypeOf(useFetch('/api/hello').data).toMatchTypeOf<Ref<string>>()
expectTypeOf(useFetch('/api/hey').data).toMatchTypeOf<Ref<{ foo:string, baz: string }>>()