Bug: delete dataset does not delete contained image that somebody projected

[mtbcarroll]

1. import an image
2. put it in a dataset
3. project the image
4. unlink the projection from the dataset
5. delete the dataset
6. be surprised that the imported image remains

This is probably due to,

<bean parent="graphPolicyRule" p:matches="!ILink[E]{r} = X:[E]{i}" p:changes="X:{r}"/>

which is one of the many alarmingly overgeneral rules that ​https://trello.com/c/Ryvi7Cra/ is intended to replace. (In deletion, for determining if an image is an orphan, there is no reason to consider projections of it.)

[jamoore]

Is this a candidate for 5.1.2?

[mtbcarroll]

There is enough graph and chmod stuff for 5.1.2 that I am hesitant to yet add further: after we get that spreadsheet done (next week?), there is a lot of follow-up activity for me to make the rules far easier to change safely. This bug may be quite solvable with but a couple of hours' thought so if it's important then I could prioritize it accordingly.

In the meantime, I have created an integration test for it at ​https://github.com/openmicroscopy/openmicroscopy/pull/3780.

[mtbcarroll]

Okay, let's shoot for 5.1.2.

[mtbcarroll]

This ticket may yet be fixed for 5.1.2 but I wouldn't want any major delete changes released without more time for testing.

[mtbcarroll]

I already have this test passing under the work for ​https://trello.com/c/Ryvi7Cra/ so this ticket oughtn't again need pushing.

[mtbcarroll]

Fixed by ​https://github.com/openmicroscopy/openmicroscopy/pull/3840.