File size: 2,865 Bytes
1e92f2d |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 |
---
id: query-invalidation
title: Query Invalidation
ref: docs/framework/react/guides/query-invalidation.md
replace: { 'useQuery': 'injectQuery', 'hooks': 'functions' }
---
[//]: # 'Example2'
```ts
import { injectQuery, QueryClient } from '@tanstack/angular-query-experimental'
class QueryInvalidationExample {
queryClient = inject(QueryClient)
invalidateQueries() {
this.queryClient.invalidateQueries({ queryKey: ['todos'] })
}
// Both queries below will be invalidated
todoListQuery = injectQuery(() => ({
queryKey: ['todos'],
queryFn: fetchTodoList,
}))
todoListQuery = injectQuery(() => ({
queryKey: ['todos', { page: 1 }],
queryFn: fetchTodoList,
}))
}
```
[//]: # 'Example2'
You can even invalidate queries with specific variables by passing a more specific query key to the `invalidateQueries` method:
[//]: # 'Example3'
```ts
queryClient.invalidateQueries({
queryKey: ['todos', { type: 'done' }],
})
// The query below will be invalidated
todoListQuery = injectQuery(() => ({
queryKey: ['todos', { type: 'done' }],
queryFn: fetchTodoList,
}))
// However, the following query below will NOT be invalidated
todoListQuery = injectQuery(() => ({
queryKey: ['todos'],
queryFn: fetchTodoList,
}))
```
[//]: # 'Example3'
The `invalidateQueries` API is very flexible, so even if you want to **only** invalidate `todos` queries that don't have any more variables or subkeys, you can pass an `exact: true` option to the `invalidateQueries` method:
[//]: # 'Example4'
```ts
queryClient.invalidateQueries({
queryKey: ['todos'],
exact: true,
})
// The query below will be invalidated
todoListQuery = injectQuery(() => ({
queryKey: ['todos'],
queryFn: fetchTodoList,
}))
// However, the following query below will NOT be invalidated
const todoListQuery = injectQuery(() => ({
queryKey: ['todos', { type: 'done' }],
queryFn: fetchTodoList,
}))
```
[//]: # 'Example4'
If you find yourself wanting **even more** granularity, you can pass a predicate function to the `invalidateQueries` method. This function will receive each `Query` instance from the query cache and allow you to return `true` or `false` for whether you want to invalidate that query:
[//]: # 'Example5'
```ts
queryClient.invalidateQueries({
predicate: (query) =>
query.queryKey[0] === 'todos' && query.queryKey[1]?.version >= 10,
})
// The query below will be invalidated
todoListQuery = injectQuery(() => ({
queryKey: ['todos', { version: 20 }],
queryFn: fetchTodoList,
}))
// The query below will be invalidated
todoListQuery = injectQuery(() => ({
queryKey: ['todos', { version: 10 }],
queryFn: fetchTodoList,
}))
// However, the following query below will NOT be invalidated
todoListQuery = injectQuery(() => ({
queryKey: ['todos', { version: 5 }],
queryFn: fetchTodoList,
}))
```
[//]: # 'Example5'
|