This PR was merged into the 4.3 branch.

Discussion
----------

[Validator] Autovalidation: skip readonly props

| Q             | A
| ------------- | ---
| Branch?       | 4.3
| Bug fix?      | yes
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| BC breaks?    | no
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Read-only properties (such as an autogenerated ID) must be skipped during the validation (it makes no sense to validate a RO property anyway).
This is an allowed BC break because this feature will be introduced in 4.3.

Commits
-------

e7dc5e1 [Validator] Autovalidation: skip readonly props

… (dunglas)

This PR was merged into the 4.3 branch.

Discussion
----------

[Doctrine][PropertyInfo] Detect if the ID is writeable

| Q             | A
| ------------- | ---
| Branch?       | 4.3
| Bug fix?      | yes
| New feature?  | yes <!-- please update src/**/CHANGELOG.md files -->
| BC breaks?    | no     <!-- see https://symfony.com/bc -->
| Deprecations? | yes/no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Companion of #31481. Allows to detect that ids with a generated value aren't writable (because the DBMS will generate the ID by itself). It could be considered as a bug fix or as a new feature. I prefer to not merge in in 3.4. However, it becomes necessary for autovalidation to work with such entities, so it should be in 4.3:

```php
/**
 * @entity
 */
class Foo
{
    /**
     * @id
     * @GeneratedValue(strategy="AUTO")
     * @column(type="integer")
     */
    public $id;
}
```

Commits
-------

4598235 [Doctrine][PropertyInfo] Detect if the ID is writeable