CHEESE_DATA.map { Cheese(id = 0, name = it) }

CHEESE_DATA

is an ArrayList. If we apply

map

with the above function then should it not create a list of Cheese objects with id

0

and name

it

. The result seems to be Cheese object with an incremented value for id and

it

name. What am I missing? https://github.com/googlesamples/android-architecture-components/blob/6248bed977e7a82d6f3199e8a940a39b7d6f051c/PagingSample/app/src/main/java/paging/android/example/com/pagingsample/CheeseDb.kt#L54

Maybe auto generated id by room?

The ID is an auto-incrementing primary key: https://github.com/googlesamples/android-architecture-components/blob/6248bed977e7a82d6f3199e8a940a39b7d6f051c/PagingSample/app/src/main/java/paging/android/example/com/pagingsample/Cheese.kt#L26

Thanks. That's right. But otherwise my assertion would be correct.

@Sudhir Singh Khanger your assertion is correct,

map

doesn't change

id

, room does it

Thanks.