| #!/usr/bin/env python |
| # encoding: utf-8 |
| |
| from flask_sqlalchemy import SQLAlchemy |
| |
| DB = SQLAlchemy() |
| |
| |
| class Ec2stackError(Exception): |
| def __init__(self, code, error, message): |
| self.code = code |
| self.error = error |
| self.message = message |
| |
| |
| class Service(object): |
| __model__ = None |
| |
| def _isinstance(self, model, raise_error=True): |
| valid_type = isinstance(model, self.__model__) |
| if not valid_type and raise_error: |
| raise ValueError('%s is not of type %s' % (model, self.__model__)) |
| return valid_type |
| |
| def save(self, model): |
| self._isinstance(model) |
| DB.session.add(model) |
| DB.session.commit() |
| return model |
| |
| def get(self, primarykey): |
| return self.__model__.query.get(primarykey) |
| |
| def create(self, **kwargs): |
| return self.save(self.__model__(**kwargs)) |
| |
| def delete(self, model): |
| self._isinstance(model) |
| DB.session.delete(model) |
| DB.session.commit() |