Fix mutation hooks types

[djhi]

Problem

Our mutation hooks explicitly exclude the mutationFn option.

However, we might want to override it to simplify hooks that reuse everything from a core mutation hook except the actual dataProvider call (ex: useSoftDelete could just pass a custom mutationFn to useDelete).

Besides, the mutationFn is optional in TanStack query so it won’t change anything for our users.

Solution

Update the mutation hook to remove the explicit exclusion.

Additional Checks

• Implemented support for custom mutationFn overrides in the mutation hooks.
• Added tests coverage for the new behavior.

[Copilot]

Pull Request Overview

This PR modifies the type definitions for mutation hooks (useUpdate, useUpdateMany, useCreate, useDelete, useDeleteMany) by removing the Omit<UseMutationOptions, 'mutationFn'> wrapper, allowing mutationFn to be included in the options type.

Key changes:

• Type definitions now directly use UseMutationOptions instead of omitting mutationFn
• Applies consistently across all five mutation hooks

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
packages/ra-core/src/dataProvider/useUpdateMany.ts	Removed Omit<..., 'mutationFn'> wrapper from UseUpdateManyOptions type definition
packages/ra-core/src/dataProvider/useUpdate.ts	Removed Omit<..., 'mutationFn'> wrapper from UseUpdateOptions type definition
packages/ra-core/src/dataProvider/useDeleteMany.ts	Removed Omit<..., 'mutationFn'> wrapper from UseDeleteManyOptions type definition
packages/ra-core/src/dataProvider/useDelete.ts	Removed Omit<..., 'mutationFn'> wrapper from UseDeleteOptions type definition
packages/ra-core/src/dataProvider/useCreate.ts	Removed Omit<..., 'mutationFn'> wrapper from UseCreateOptions type definition

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[slax57]

Actually Copilot is right! (for once...)
However attempting to fix the issue uncovered other TS issues that I was unable to solve so far.
We'll need more time to properly fix this PR.
Btw this PR should target master rather that next IMHO.