Dependencies

We call dependencies the relationships between data that affect each other. A simple example: Routes depend on Lines, so deleting a Line will result in the deletion of the Routes it contains, as a Route is a dependency of the Line that contains it.

The myBus Manage system alerts the user if, as a result of an action taken by the user within the system, any dependency will be deleted, changed, or if it will not be possible to delete a piece of data because its dependencies must be deleted first.

Dependency Relationship by Section

Item	Requirements to delete	Impact when deleted	Impact when unlinked from an Agency
Lines	Delete the Routes with associated Calendars. Disconnect Playlists.	No impact	Equivalent to deleting it only for that Agency. Requirements for deleting Line apply.
Routes	If it has Assigned Trips, they must be deleted. Disconnect Playlists.	Affects other items It is removed from the Line it belonged to.	No impact They do not have an assigned Agency.
Stops	Remove it from all Routes that include it in their path. Disconnect Playlists.	Affects other items The stop audio is removed.	Equivalent to deleting it only for that Agency. Requirements for deleting Stop apply.
Calendars	They must not have associated Trips, Shifts (assigned or unassigned), or Playlists.	No impact	Equivalent to deleting it only for that Agency. Requirements for deleting Calendar apply.
Trips	No requirements	Affects other items When a trip is deleted, it disappears from the shift it belongs to.	No impact They do not have an assigned Agency.
Shifts	Delete the date (future).	No impact	No impact They do not have an assigned Agency.
Drivers	Unassign dated Shifts (Assigned Shifts) or remove the dates from those dated Shifts.	No impact	No impact They can only have one assigned Agency.
Vehicles	Unassign dated Shifts (Assigned Shifts) or remove the dates from those dated Shifts. Unassign Playlists. Unlink from Chats.	No impact	No impact They can only have one assigned Agency.
Playlists	No requirements	Affects other items If the Playlist has Media from other Agencies, those Media items will no longer be visible to users who do not belong to that Agency.	No impact
Media	Unassign it from the Playlists that use it.	No impact	No impact
Users	No requirements	Affects other items Media created by that user will be deleted from the system (except if it belongs to a Playlist).	No impact