pydantic-swift-code 0.2.0

Overview

Micro-package that defines a SWIFT code type using the Pydantic package

Installation

Install from PyPI

pip install pydantic-swift-code

Install from GitHub

pip install git@github.com:duketemon/pydantic-swift-code.git

Usage

from typing import Optional
from pydantic import BaseModel, field_validator
from pydantic_swift_code import SwiftCode

class BankAccount(BaseModel):
    swift_code: SwiftCode

    @field_validator("swift_code", mode="before")
    @classmethod
    def validate_swift_code_before_init(cls, swift_code: Optional[str]) -> str:
        """Make input case-insensitive"""
        if swift_code is None:
            raise ValueError("Received None value, expected string")

        return swift_code.upper()

    @field_validator("swift_code", mode="after")
    @classmethod
    def validate_swift_code_after_init(cls, swift_code: str) -> str:
        """Custom validation"""
        
        if swift_code[:4] not in {"REVO", "MONZ"}:
            raise ValueError("Only Revolut and Monzo swift codes are allowed")
        
        if swift_code[4:6] not in {"US", "GB"}:
            raise ValueError("Only GB and US swift codes are allowed")
        
        return swift_code