_*: hr_timesheet,sale_project,sale_timesheet
Generally, you don't want subtasks to be displayed at the same level
as their parent tasks. You want to consider the subtasks as part of
their parent's project, but don't want to see them directly in this
project. Rather, you want them to be accessible only via their parent.
(There are exceptions to that and we want to stay flexible.)
First solution that comes to mind is to have `project_id` set to False
for the latter tasks, but then how to get the value of the fields that
are related to the project?
So, second solution would be to have a field `project_root_id`,
which would be the project of the parent, or the grand-parent, etc.
The issue now is that we have to fields "project", and it isn't obvious
when to use one or the other.
The most simple way to answer this need is to keep one field "project",
that will always be set for (non-private) tasks,
and create a boolean field : `display_in_project`.
But we want it to be technical (no checkbox in the view).
So, when the user unsets the project on a subtask, the view will act
as if the project was unset, but in the back-end,
we'll set `display_in_project` to False and set `project_id` back.
The fact that all tasks have a project allows us to know if action x
can be perform on this task t, dependind on t.project_id.allow_x.
task-3367246
closesodoo/odoo#128281
Related: odoo/enterprise#43996
Related: odoo/upgrade#4930
Signed-off-by: Xavier Bol (xbo) <xbo@odoo.com>
Audric Onockx (auon)
fb88a7448c