switched to 'native' Ecto.Enum for user week_starts_at field

priv/repo/migrations/20200913000515_create_users_auth_tables.exs

@@ -8,7 +8,7 @@ defmodule Shift73k.Repo.Migrations.CreateUsersAuthTables do
       add(:id, :binary_id, primary_key: true)
       add(:email, :citext, null: false)
       add(:hashed_password, :string, null: false)
-      add(:week_start_at, :integer, null: false)
+      add(:week_start_at, :string, null: false)
       add(:confirmed_at, :naive_datetime)
       timestamps()
     end

priv/repo/seeds.exs

@@ -55,6 +55,10 @@ extra_mock_users = ~s([
   {"email":"kat@73k.us","password":"katkatA1","role":"manager","inserted_at":"2018-12-14T01:06:01Z","confirmed_at":true}
 ])
 
+# for random week_start_at values
+[head | tail] = Shift73k.Util.Dt.weekdays()
+week_starts = [head | Enum.drop(tail, 4)]
+
 mock_users =
   extra_mock_users
   |> Jason.decode!()
@@ -66,7 +70,7 @@ mock_users =
       email: e["email"],
       role: String.to_existing_atom(e["role"]),
       hashed_password: Bcrypt.hash_pwd_salt(e["password"]),
-      week_start_at: :rand.uniform(2),
+      week_start_at: Enum.at(week_starts, Enum.random(0..2)),
       inserted_at: add_dt,
       updated_at: add_dt,
       confirmed_at: (e["confirmed_at"] && NaiveDateTime.add(add_dt, 300, :second)) || nil