DDC-3979: [GH-1544] DefaultEntityHydrator: Undefined index: targetToSourceKeyColumns

[doctrinebot]

Jira issue originally created by user @doctrinebot:

This issue is created automatically through a Github pull request on behalf of giosh94mhz:

Url: #1544

Message:

I'm experiencing an issue while configuring the SecondLevelCache. I still have to figure out correctly how it works (the docs are not very verbose on the topic), so actually I have messed up with many parameters.

I found a bug while caching entities which have non-owning OneToOne relationship: in these case, if the relation is not marked as @Cacheable, i got the message Undefined index: targetToSourceKeyColumns. This issue never happens on the owning side.

I was able to track down the issue, and the commit here just expose the issue in some existing tests.

I'm sorry I cannot give you a proper patch, but I don't know if the problem reside in the Hydrator logic, in the association class (since targetToSourceKeyColumns and sourceToTargetKeyColumns are unset) or in the configuration validation.

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-1544] was closed:
#1544

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-1544] was assigned:
#1544

[doctrinebot]

Issue was closed with resolution "Fixed"