I’m learning Ecto, and having issues trying to update following the docs. In my repo User has_many UserOrganisations, and there’s boolean called home on UserOrganisations. I’m attempting to set them all to false.

First: I load my user.
user = Repo.get!(User, 1) |> Repo.preload(:user_organisations)

Looking at the docs it really looks like I should be able to do:

user_orgs = Enum.map(user.user_organisations, &(put_in(&1.home, false)))
(this correctly returns the updated structs with home set to false)

However, performing the following makes no changes.

user |> change() |> put_assoc(:user_organisations, user_orgs) |> Repo.update()

If instead I create the orgs by explicitly wrapping them in a changeset

user_orgs = Enum.map(user.user_organisations, &(change(&1, %{home: false})))

Then the changes are made.

I’m assuming I’m misunderstanding something here, but, on the off-chance that the docs are wrong I thought I’d double check. I also tried using update_in like in the docs, but, that didn’t work either.