88 lines
2.9 KiB
Python
88 lines
2.9 KiB
Python
# Copyright 2011 OpenStack Foundation
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Custom SQLAlchemy types."""
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import netaddr
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from oslo_utils import netutils
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import sqlalchemy as sa
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import sqlalchemy.dialects.mysql
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import sqlalchemy.dialects.postgresql
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from sqlalchemy import types
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from nova import utils
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# NOTE(dprince): This wrapper allows us to easily match the Folsom MySQL
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# Schema. In Folsom we created tables as latin1 and converted them to utf8
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# later. This conversion causes some of the Text columns on MySQL to get
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# created as mediumtext instead of just text.
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def MediumText():
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return sa.Text().with_variant(
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sqlalchemy.dialects.mysql.MEDIUMTEXT(), 'mysql')
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class IPAddress(types.TypeDecorator):
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"""An SQLAlchemy type representing an IP-address."""
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impl = types.String
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cache_ok = True
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def load_dialect_impl(self, dialect):
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if dialect.name == 'postgresql':
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return dialect.type_descriptor(
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sqlalchemy.dialects.postgresql.INET())
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return dialect.type_descriptor(types.String(39))
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def process_bind_param(self, value, dialect):
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"""Process/Formats the value before insert it into the db."""
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if dialect.name == 'postgresql':
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return value
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# NOTE(maurosr): The purpose here is to convert ipv6 to the shortened
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# form, not validate it.
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if netutils.is_valid_ipv6(value):
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return utils.get_shortened_ipv6(value)
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return value
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class CIDR(types.TypeDecorator):
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"""An SQLAlchemy type representing a CIDR definition."""
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impl = types.String
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cache_ok = True
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def load_dialect_impl(self, dialect):
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if dialect.name == 'postgresql':
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return dialect.type_descriptor(
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sqlalchemy.dialects.postgresql.INET())
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return dialect.type_descriptor(types.String(43))
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def process_bind_param(self, value, dialect):
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"""Process/Formats the value before insert it into the db."""
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# NOTE(sdague): normalize all the inserts
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if netutils.is_valid_ipv6_cidr(value):
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return utils.get_shortened_ipv6_cidr(value)
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return value
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def process_result_value(self, value, dialect):
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try:
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return str(netaddr.IPNetwork(value, version=4).cidr)
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except netaddr.AddrFormatError:
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return str(netaddr.IPNetwork(value, version=6).cidr)
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except TypeError:
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return None
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