1/ Write a form view with a o2m field that has its own inline tree view (no other view exist in db for the target model) 2/ Open that view in a mobile environment 3/ Instead of having a list view, you get a kanban view. No luck for you, since the default kanban generated by `models.py` is an empty one, your records are *invisible* \o/ From what I can tell, the previous condition made no sense: ``` if (there is a list view and a kanban view) <-- this seems absurd then (use the list mode) elif (there is no list view but a kanban view) then (use the kanban mode) else (use both modes) ``` The first condition seems absurd: it *actively* ignores a kanban view if there is one. Even better, the list view whose existence it checks is never there: it checks for a `tree` when it should be checking for a `list`. In short, the first condition was *never* met, and you ended up either with exclusive kanban mode or with both modes - even if you had no existing kanban view for the target model... This commit moves the normalization of `tree` into `list` before attempting to process the x2many field's subviews. It clarify the usage of `tree` vs `list` (cf. only use `list`) which prevents weird edge cases like described above. closes odoo/odoo#36237 Signed-off-by: Adrien Dieudonné (adr) <adr@odoo.com> Co-authored-by: Adrien Dieudonné <adr@odoo.com> Co-authored-by: Pierre Paridans <app@odoo.com>