<filename>cognito_emulator/models.py
# Copyright (c) 2020 Open Collector, Inc.
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# furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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import sqlalchemy as sa  # type: ignore
from sqlalchemy.ext.declarative import declared_attr  # type: ignore
from sqlalchemy.sql import functions as sql_func  # type: ignore

from . import utils


class CreatedMixin:
    @declared_attr
    def created_at(cls):
        return sa.Column(
            sa.DateTime(),
            nullable=False,
            server_default=sql_func.current_timestamp(),
            default=utils.utcnow,
        )


class CreatedUpdatedMixin(CreatedMixin):
    @declared_attr
    def updated_at(cls):
        return sa.Column(
            sa.DateTime(),
            nullable=False,
            server_default=sql_func.current_timestamp(),
            default=utils.utcnow,
            onupdate=utils.utcnow,
        )
