[jira] [Created] (SLING-4767) Optional sub models are logged as warn if they cannot be adapted

["Georg Henzler (JIRA)" <ji...@apache.org>]

Georg Henzler created SLING-4767:
------------------------------------

             Summary: Optional sub models are logged as warn if they cannot be adapted
                 Key: SLING-4767
                 URL: https://issues.apache.org/jira/browse/SLING-4767
             Project: Sling
          Issue Type: Improvement
            Reporter: Georg Henzler


Currently Sling Models logs the example model \[1] as warning \[2] if the sub model image does not exist. This really should be a debug log as it is totally fine if in optional field cannot be set?

\[1]
{code}
com......mediagallery.MediaGalleryElement
...
    @Inject
    @Optional
    @Named(value = ".")
    private Image image;
{code}

\[2] org.apache.sling.models.impl.ModelAdapterFactory.injectElement(InjectableElement, Object, Model, DisposalCallbackRegistry, InjectCallback)
{code}
                // log previous injection error, if there was any
                if (lastInjectionException != null) {
                    log.warn("Although falling back to default value worked, injection into {} failed because of: " + lastInjectionException.getMessage(), element.getAnnotatedElement(), lastInjectionException);
                }
{code}



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