fix: Call to a member function getErrors() on null in CheckQueryReturnTrait

[kenjis]

Description Fixes #1087

Since CI 4.5.0, $this->validation may be null.

Checklist:

• [x] Securely signed commits
• [ ] Component(s) with PHPDoc blocks, only if necessary or adds value
• [ ] Unit testing, with >80% coverage
• [ ] User guide updated
• [x] Conforms to style guide

[kenjis]

@datamweb Ah, if $this->validation is null, the model did not run validation. So, your way is the way to go.

[kenjis]

$this->validation?->getErrors() requires PHP 8.0. Shield still supports PHP 7.4. https://github.com/codeigniter4/shield/blob/0894a161d00d11f7cf863caac3bff53a28795b38/composer.json#L28

[datamweb]

Wait for a new version of Shield to be released, or temporarily use the develop branch:

composer require codeigniter4/shield:dev-develop

[quickdunk]

Thanks for this!