Enable used rolling stock deletion with a confirmation dialogue

[Synar]

Who would benefit from this feature?

End users

What is this feature about?

Currently, trying to delete a rolling stock that is used in at least one scenario leads to an error modal, with only the option to cancel.

This enhancement would :

• add an option to delete anyway (which would send a request with the --force flag, already implemented for this purpose in editoast)
• add detailed informations on the number of trains, scenarios, studies and projects using the rolling stock to the modal
• add links to the corresponding scenarios in the modal, filtered by the rolling stock to be deleted, with the filters exposed in the url

Why is this feature valuable?

This issue was planned for and its groundwork was implemented in editoast in #8078

We used to have such a mechanism that prevented a rolling stock from being deleted if it was used in some train schedules. We did that because TrainSchedule V1 used to reference a rolling stock using a foreign key. So removing it also deleted the associated train schedules.

Since TSV2, rolling stocks are loosely referenced using their name. If the rolling stock doesn't exist, the train schedule is deemed invalid but still exists. We still want to warn the user that deleting a rolling stock might invalidate some train schedules though.

However, as far as I am aware, the issue to implement the front part has not yet been created.

Anything else people should know?

This was discussed with @flomonster

[flomonster]

add links to the corresponding scenarios in the modal, filtered by the rolling stock to be deleted, with the filters exposed in the url

To do so we need to do this enhancement first.

[Synar]

add links to the corresponding scenarios in the modal, filtered by the rolling stock to be deleted, with the filters exposed in the url

To do so we need to do this enhancement first.

Done

[bloussou]

AC are not done even if some improvements were done

[Synar]

My bad I keep marking this as completed by mistake ^^'