lib/cannery/accounts.ex

@@ -112,7 +112,7 @@ defmodule Cannery.Accounts do
     |> Multi.one(:users_count, from(u in User, select: count(u.id), distinct: true))
     |> Multi.insert(:add_user, fn %{users_count: count} ->
       # if no registered users, make first user an admin
-      role = if count == 0, do: :admin, else: :user
+      role = if count == 0, do: "admin", else: "user"
 
       User.registration_changeset(attrs) |> User.role_changeset(role)
     end)

lib/cannery/accounts/user.ex

@@ -48,7 +48,7 @@ defmodule Cannery.Accounts.User do
   @type new_user :: %User{}
   @type id :: UUID.t()
   @type changeset :: Changeset.t(t() | new_user())
-  @type role :: :admin | :user
+  @type role :: :admin | :user | String.t()
 
   @doc """
   A user changeset for registration.
@@ -81,7 +81,7 @@ defmodule Cannery.Accounts.User do
   """
   @spec role_changeset(t() | new_user() | changeset(), role()) :: changeset()
   def role_changeset(user, role) do
-    user |> change(role: role)
+    user |> cast(%{"role" => role}, [:role])
   end
 
   @spec validate_email(changeset()) :: changeset()

test/support/fixtures.ex

@@ -21,8 +21,8 @@ defmodule Cannery.Fixtures do
   def unique_user_email, do: "user#{System.unique_integer()}@example.com"
   def valid_user_password, do: "hello world!"
 
-  @spec user_fixture() :: User.t()
+  @spec user_fixture() :: Accounts.User.t()
-  @spec user_fixture(attrs :: map()) :: User.t()
+  @spec user_fixture(attrs :: map()) :: Accounts.User.t()
   def user_fixture(attrs \\ %{}) do
     attrs
     |> Enum.into(%{
@@ -33,8 +33,8 @@ defmodule Cannery.Fixtures do
     |> unwrap_ok_tuple()
   end
 
-  @spec admin_fixture() :: User.t()
+  @spec admin_fixture() :: Accounts.User.t()
-  @spec admin_fixture(attrs :: map()) :: User.t()
+  @spec admin_fixture(attrs :: map()) :: Accounts.User.t()
   def admin_fixture(attrs \\ %{}) do
     attrs
     |> Enum.into(%{
@@ -43,7 +43,7 @@ defmodule Cannery.Fixtures do
     })
     |> Accounts.register_user()
     |> unwrap_ok_tuple()
-    |> User.role_changeset(:admin)
+    |> User.role_changeset("admin")
     |> Repo.update!()
   end