高英健
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* docs: sync Chinese doc to 3.0.0-beta.29 * docs: sync Chinese doc to 3.0.0-beta.30 * main page
69 lines
3.3 KiB
Markdown
69 lines
3.3 KiB
Markdown
# ApolloQuery component
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Example:
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```vue
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<ApolloQuery
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:query="gql => gql`
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query MyHelloQuery ($name: String!) {
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hello (name: $name)
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}
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`"
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:variables="{ name }"
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>
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<template v-slot="{ result: { error, data }, isLoading }">
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<!-- Loading -->
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<div v-if="isLoading" class="loading apollo">Loading...</div>
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<!-- Error -->
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<div v-else-if="error" class="error apollo">An error occured</div>
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<!-- Result -->
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<div v-else-if="data" class="result apollo">{{ data.hello }}</div>
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<!-- No result -->
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<div v-else class="no-result apollo">No result :(</div>
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</template>
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</ApolloQuery>
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```
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::: warning
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To enable support of `gql` string tag in Vue templates, see the necessary setup in [the guide](../guide/components/query.md#tag-setup).
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:::
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## Props
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- `query`: GraphQL query (transformed by `graphql-tag`) or a function that receives the `gql` tag as argument and should return the transformed query
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- `variables`: Object of GraphQL variables
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- `fetchPolicy`: See [apollo fetchPolicy](https://www.apollographql.com/docs/react/basics/queries.html#graphql-config-options-fetchPolicy)
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- `pollInterval`: See [apollo pollInterval](https://www.apollographql.com/docs/react/basics/queries.html#graphql-config-options-pollInterval)
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- `notifyOnNetworkStatusChange`: See [apollo notifyOnNetworkStatusChange](https://www.apollographql.com/docs/react/basics/queries.html#graphql-config-options-notifyOnNetworkStatusChange)
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- `context`: See [apollo context](https://www.apollographql.com/docs/react/basics/queries.html#graphql-config-options-context)
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- `update`: Function to transform the result `data`, useful for picking a specific part of the response. Example: `:update="data => data.user.messages"`
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- `skip`: Boolean disabling query fetching
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- `clientId`: id of the Apollo Client used by the query (defined in ApolloProvider `clients` option)
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- `deep`: Boolean to use deep Vue watchers
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- `tag`: String HTML tag name (default: `div`); if falsy (for example `null` or `undefined`), the component will be renderless (the content won't be wrapped in a tag), in this case, only the first child will be rendered
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- `debounce`: Number of milliseconds for debouncing refetches (for example when the variables are changed)
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- `throttle`: Number of milliseconds for throttling refetches (for example when the variables are changed)
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- `prefetch`: If `false`, will skip prefetching during SSR
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## Scoped slot
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- `result`: Apollo Query result
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- `result.data`: Data returned by the query (can be transformed by the `update` prop)
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- `result.fullData`: Raw data returned by the query (not transformed by the `update` prop)
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- `result.loading`: Boolean indicating that a request is in flight (you may need to set `notifyOnNetworkStatusChange` prop for it to change)
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- `result.error`: Eventual error for the current result
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- `result.networkStatus`: See [apollo networkStatus](https://www.apollographql.com/docs/react/basics/queries.html#graphql-query-data-networkStatus)
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- `query`: Smart Query associated with the component. It's useful to do some operations like `query.refetch()` or `query.fetchMore()`.
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- `isLoading`: Smart Query loading state
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- `gqlError`: first GraphQL error if any
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- `times`: number of times the result was updated
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## Events
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- `result(resultObject)`
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- `error(errorObject)`
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- `loading(boolean)`
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