Add dev blog about entity service schema validation (#2289)

* Add dev blog about entity service schema validation

* Apply suggestions from code review

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* Update 2024-08-27-entity-service-schema-validation.md

* correct link

* Adjust

* Update links to PRs

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Erik Montnemery 2024-09-02 15:17:38 +02:00 committed by GitHub
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---
author: Erik Montnemery
authorURL: https://github.com/emontnemery
title: "Validation of entity action schemas"
---
A warning will now be logged when registering an entity action with a custom schema which does not meet at least one of these criteria:
- A validator returned by `cv.make_entity_service_schema`
- A validator returned by `cv.make_entity_service_schema`, wrapped in a `vol.Schema`
- A validator returned by `cv.make_entity_service_schema`, wrapped in a `vol.All`
In Home Assistant Core 2025.10, it will no longer be possible to register an entity action with a custom schema not meeting this requirement.
It's still possible to register an entity action with no schema, or with a dict representing the additional action call parameters.
The reason for the change is that if `cv.make_entity_service_schema` is not used, the service will not automatically support all possible ways of targeting entities.
More details can be found in the [developer documentation](/docs/dev_101_services/#entity-service-actions) and in core PRs [#124102](https://github.com/home-assistant/core/pull/124102) and [#125057](https://github.com/home-assistant/core/pull/125057).