@@ -, +, @@ types 1) Run prove t/db_dependent/api/v1/patrons_accounts.t and notice it doesn't fail --- api/v1/swagger/definitions/account_line.json | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/api/v1/swagger/definitions/account_line.json +++ a/api/v1/swagger/definitions/account_line.json @@ -84,7 +84,10 @@ "description": "Internal note" }, "user_id": { - "type": "integer", + "type": [ + "integer", + "null" + ], "description": "Internal patron identifier for the staff member that introduced the account line" }, "library_id": { --