import logging

import json

from flask.ext.sqlalchemy import SQLAlchemy

from accounting.exceptions import AccountingException

from accounting.storage import Storage

from accounting.models import Transaction, Posting, Amount

_log = logging.getLogger(__name__)

db = SQLAlchemy()

class SQLStorage(Storage):

    def __init__(self, app=None):

        if not app:

            raise Exception('Missing app keyword argument')

        self.app = app

        db.init_app(app)

        from .models import Transaction as SQLTransaction, \

            Posting as SQLPosting, Amount as SQLAmount