Filters

Source URL: https://tanstack.com/query/latest/docs/framework/react/guides/filters

Filters

Some methods within TanStack Query accept a QueryFilters or MutationFilters object.

Query Filters

A query filter is an object with certain conditions to match a query with:

// Cancel all queries
await queryClient.cancelQueries()

// Remove all inactive queries that begin with `posts` in the key
queryClient.removeQueries({ queryKey: ['posts'], type: 'inactive' })

// Refetch all active queries
await queryClient.refetchQueries({ type: 'active' })

// Refetch all active queries that begin with `posts` in the key
await queryClient.refetchQueries({ queryKey: ['posts'], type: 'active' })

A query filter object supports the following properties:

• queryKey?: QueryKey
  • Set this property to define a query key to match on.
• exact?: boolean
  • If you don’t want to search queries inclusively by query key, you can pass the exact: true option to return only the query with the exact query key you have passed.
• type?: 'active' | 'inactive' | 'all'
  • Defaults to all
  • When set to active it will match active queries.
  • When set to inactive it will match inactive queries.
• stale?: boolean
  • When set to true it will match stale queries.
  • When set to false it will match fresh queries.
• fetchStatus?: FetchStatus
  • When set to fetching it will match queries that are currently fetching.
  • When set to paused it will match queries that wanted to fetch, but have been paused.
  • When set to idle it will match queries that are not fetching.
• predicate?: (query: Query) => boolean
  • This predicate function will be used as a final filter on all matching queries. If no other filters are specified, this function will be evaluated against every query in the cache.

Mutation Filters

A mutation filter is an object with certain conditions to match a mutation with:

// Get the number of all fetching mutations
await queryClient.isMutating()

// Filter mutations by mutationKey
await queryClient.isMutating({ mutationKey: ['post'] })

// Filter mutations using a predicate function
await queryClient.isMutating({
  predicate: (mutation) => mutation.state.variables?.id === 1,
})

A mutation filter object supports the following properties:

• mutationKey?: MutationKey
  • Set this property to define a mutation key to match on.
• exact?: boolean
  • If you don’t want to search mutations inclusively by mutation key, you can pass the exact: true option to return only the mutation with the exact mutation key you have passed.
• status?: MutationStatus
  • Allows for filtering mutations according to their status.
• predicate?: (mutation: Mutation) => boolean
  • This predicate function will be used as a final filter on all matching mutations. If no other filters are specified, this function will be evaluated against every mutation in the cache.

Utils

matchQuery

const isMatching = matchQuery(filters, query)

Returns a boolean that indicates whether a query matches the provided set of query filters.

matchMutation

const isMatching = matchMutation(filters, mutation)

Returns a boolean that indicates whether a mutation matches the provided set of mutation filters.