I’m testing the test_controller and I’m getting this error:

** (FunctionClauseError) no function clause matching in Ecto.Changeset.cast/4
when attempting to create or update an object.

The following arguments were given to Ecto.Changeset.cast/4:

     # 1
     MyTest.Whatwasit.Version
 
     # 2
     %{action: "update", item_id: 730, item_type: "AdminUser", item_user_id: nil, object: %{admin_author_id: nil, availability_flag: false, email: "weren1930-1@gmail.com", failed_log_in_attempts: 0, full_name: "Petra fhghgf", groups: nil, id: 730, inserted_at: ~N[2023-06-09 10:46:47.691601], last_locked_at: nil, last_log_in_at: nil, last_log_in_remote_ip: nil, last_password_reset_at: nil, last_seen_at: nil, log_in_count: 0, reset_password_sent_at: nil, reset_password_token: nil, roles: ["admin"], updated_at: ~N[2023-06-09 10:46:47.692937], uuid: "df6789e9-f5a0-9876-80c4-0bgb72d777d2"}, whodoneit_admin_id: 729, whodoneit_admin_name: "test acc", whodoneit_id: nil, whodoneit_name: nil}
 
     # 3
     [:item_type, :item_id, :item_user_id, :object, :action, :whodoneit_id, :whodoneit_name, :whodoneit_admin_id, :whodoneit_admin_name]
 
     # 4
     []
 
 Attempted function clauses (showing 5 out of 5):
 
     def cast(_data, %{__struct__: _} = params, _permitted, _opts)
     def cast({data, types}, params, permitted, opts) when is_map(data)
     def cast(%Ecto.Changeset{types: nil}, _params, _permitted, _opts)
     def cast(%Ecto.Changeset{changes: changes, data: data, types: types, empty_values: empty_values} =
   changeset, params, permitted, opts)
     def cast(%{__struct__: module} = data, params, permitted, opts)
 
 code: patch(
 stacktrace:
   (ecto 3.3.4) Ecto.Changeset.cast/4
   (my_test 4.0.0) lib/my_test/shared/whatwasit_version.ex:42: MyTest.Whatwasit.Version.module_changeset/2
   (my_test 4.0.0) lib/my_test/shared/whatwasit_version.ex:117: MyTest.Whatwasit.Version.insert_version/3
   (ecto 3.3.4) lib/ecto/repo/schema.ex:528: anonymous fn/2 in Ecto.Repo.Schema.run_prepare/2
   (elixir 1.13.4) lib/enum.ex:2396: Enum."-reduce/3-lists^foldl/2-0-"/3
   (ecto 3.3.4) lib/ecto/repo/schema.ex:326: anonymous fn/15 in Ecto.Repo.Schema.do_update/4
   (ecto 3.3.4) lib/ecto/repo/schema.ex:919: anonymous fn/3 in Ecto.Repo.Schema.wrap_in_transaction/6
   (ecto_sql 3.3.3) lib/ecto/adapters/sql.ex:886: anonymous fn/3 in Ecto.Adapters.SQL.checkout_or_transaction/4
   (db_connection 2.2.1) lib/db_connection.ex:1427: DBConnection.run_transaction/4
   (my_test 4.0.0) lib/my_test_web/controllers/admin/test_controller.ex:97: MyTestWeb.Admin.TestController.update/3
   (my_test 4.0.0) lib/my_test_web/controllers/admin/test_controller.ex:1: MyTestWeb.Admin.TestController.action/2
   (my_test 4.0.0) lib/my_test_web/controllers/admin/test_controller.ex:1: MyTestWeb.Admin.TestController.phoenix_controller_pipeline/2
   (phoenix 1.5.14) lib/phoenix/router.ex:352: Phoenix.Router.__call__/2
   (my_test 4.0.0) lib/my_test_web/endpoint.ex:1: MyTestWeb.Endpoint.plug_builder_call/2
   (my_test 4.0.0) lib/my_test_web/endpoint.ex:1: MyTestWeb.Endpoint.call/2
   (phoenix 1.5.14) lib/phoenix/test/conn_test.ex:225: Phoenix.ConnTest.dispatch/5
   test/my_test_web/controllers/admin/test_controller_test.exs:72: (test)

test_controller.ex

def update(conn, %{“admin_user” => admin_params}, current_admin) do
changeset =
AdminUser.common_changeset(conn.assigns.admin_user, admin_params, whodoneit(current_admin))

case Repo.update(changeset) do
  {:ok, _admin} ->
    msg = gettext("user updated successfully")

    conn
    |> put_flash(:success, msg)
    |> redirect(to: Routes.test_user_path(conn, :index))

  {:error, changeset} ->
    render(conn, "edit.html", changeset: changeset)
end

end

test_controller_test.ex

test “Cannot add ‘root’ role to admin-user”, %{auth_conn: conn} do
admin = insert(:admin_user)

  patch(
    conn,
    Routes.test_user_path(conn, :update, admin),
    %{admin_user: %{roles: ~w[root admin]}}
  )
  
end

end

It seems like Elixir is matching a Ecto.Changeset.cast/3 into a Ecto.Changeset.cast/4 adding an empty array as the 4th parameter, and the error is throwing in Repo.update(changeset).

Note: This exunit test was running earlier, but after upgrading the elixir version to 1.13.4 and phoenix version to 1.5.14 similar unit tests are failing.

Please help to resolve this error.

Thanks,
Rakesh