useMutationState is a hook that gives you access to all mutations in the MutationCache. You can pass filters to it to narrow down your mutations, and select to transform the mutation state.
Example 1: Get all variables of all running mutations
import { useMutationState } from '@tanstack/react-query'
const variables = useMutationState({
filters: { status: 'pending' },
select: (mutation) => mutation.state.variables,
})
import { useMutationState } from '@tanstack/react-query'
const variables = useMutationState({
filters: { status: 'pending' },
select: (mutation) => mutation.state.variables,
})
Example 2: Get all data for specific mutations via the mutationKey
import { useMutation, useMutationState } from '@tanstack/react-query'
const mutationKey = ['posts']
// Some mutation that we want to get the state for
const mutation = useMutation({
mutationKey,
mutationFn: (newPost) => {
return axios.post('/posts', newPost)
},
})
const data = useMutationState({
// this mutation key needs to match the mutation key of the given mutation (see above)
filters: { mutationKey },
select: (mutation) => mutation.state.data,
})
import { useMutation, useMutationState } from '@tanstack/react-query'
const mutationKey = ['posts']
// Some mutation that we want to get the state for
const mutation = useMutation({
mutationKey,
mutationFn: (newPost) => {
return axios.post('/posts', newPost)
},
})
const data = useMutationState({
// this mutation key needs to match the mutation key of the given mutation (see above)
filters: { mutationKey },
select: (mutation) => mutation.state.data,
})
Example 3: Access the latest mutation data via the mutationKey Each invocation of mutate adds a new entry to the mutation cache for gcTime milliseconds.
To access the latest invocation, you can check for the last item that useMutationState returns.
import { useMutation, useMutationState } from '@tanstack/react-query'
const mutationKey = ['posts']
// Some mutation that we want to get the state for
const mutation = useMutation({
mutationKey,
mutationFn: (newPost) => {
return axios.post('/posts', newPost)
},
})
const data = useMutationState({
// this mutation key needs to match the mutation key of the given mutation (see above)
filters: { mutationKey },
select: (mutation) => mutation.state.data,
})
// Latest mutation data
const latest = data[data.length - 1]
import { useMutation, useMutationState } from '@tanstack/react-query'
const mutationKey = ['posts']
// Some mutation that we want to get the state for
const mutation = useMutation({
mutationKey,
mutationFn: (newPost) => {
return axios.post('/posts', newPost)
},
})
const data = useMutationState({
// this mutation key needs to match the mutation key of the given mutation (see above)
filters: { mutationKey },
select: (mutation) => mutation.state.data,
})
// Latest mutation data
const latest = data[data.length - 1]
Options
Returns