Hello everyone! 
Given the following 2 schemas:
defmodule Company do
use Ecto.Schema
import Ecto.Changeset
schema "companies" do
field :name, :string
field :country_code, :string, default: "NO" # ISO 3166 alpha-2 code
field :org_number, :string
timestamps()
has_many :departments, Department
end
def changeset(%Company{} = company, attrs \\ %{}) do
company
|> cast(attrs, [:name, :country_code, :org_number])
|> cast_assoc(:departments)
end
end
defmodule Department do
use Ecto.Schema
import Ecto.Changeset
schema "departments" do
field :name, :string
field :deleted_at, Timex.Ecto.DateTime
timestamps()
belongs_to :company, Company
end
def changeset(%Department{} = department, attrs \\ %{}) do
department
|> cast(attrs, [:company_id, :name])
|> validate_required([:name])
end
def delete_changeset(%Department{} = department) do
change(department, %{deleted_at: Timex.now()})
end
end
I’m using cast_assoc for has_many assoc on company, and I’d like to define :on_replace in such a way that I could do soft-delete with Department.delete_changeset |> Repo.update. Can this be done?
I was thinking about altering department changeset action from :delete to :update in such case, but when setting on_replace: :delete in company’s assoc it does straight Repo.delete without passing department through my department’s changeset fn.
What would be the best way to combine soft-delete (by setting deleted_at) with cast_assoc?
