✅ How to group nested departments?
First of all I wanna show structure of departments:
FIRST OFFICE
| first room
| second room
| third room ( nested of second room )
SECOND OFFICE
| first room
| second room
| third room ( nested of second room )
okey, each office and each room has id, title and parent_id
for example, third_room will have parent_id == second room.id
if
parent_id == null
, this is root!
so I have following code:
it will return all departments with id, parent_id but without any grouping and I don't understand how to group
I have GetByParentId
function so I can write this:
So I need the same but with GetByParentsIds
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