46 lines
1.9 KiB
Python
46 lines
1.9 KiB
Python
# 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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from neutron_lib.db import model_base
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import sqlalchemy as sa
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from sqlalchemy import orm
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from neutron.db import models_v2
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class ExtraDhcpOpt(model_base.BASEV2, model_base.HasId):
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"""Represent a generic concept of extra options associated to a port.
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Each port may have none to many dhcp opts associated to it that can
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define specifically different or extra options to DHCP clients.
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These will be written to the <network_id>/opts files, and each option's
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tag will be referenced in the <network_id>/host file.
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"""
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port_id = sa.Column(sa.String(36),
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sa.ForeignKey('ports.id', ondelete="CASCADE"),
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nullable=False)
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opt_name = sa.Column(sa.String(64), nullable=False)
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opt_value = sa.Column(sa.String(255), nullable=False)
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ip_version = sa.Column(sa.Integer, server_default='4', nullable=False)
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__table_args__ = (sa.UniqueConstraint(
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'port_id',
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'opt_name',
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'ip_version',
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name='uniq_extradhcpopts0portid0optname0ipversion'),
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model_base.BASEV2.__table_args__,)
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# Add a relationship to the Port model in order to instruct SQLAlchemy to
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# eagerly load extra_dhcp_opts bindings
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ports = orm.relationship(
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models_v2.Port,
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backref=orm.backref("dhcp_opts", lazy='joined', cascade='delete'))
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