41 lines
1.7 KiB
Python
41 lines
1.7 KiB
Python
# 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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import migrate
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from sqlalchemy import MetaData, String, Table
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def upgrade(migrate_engine):
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meta = MetaData(bind=migrate_engine)
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shadow_agents = Table('shadow_agents', meta, autoload=True)
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pods = Table('pods', meta, autoload=True)
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col_pod_id_fkey = shadow_agents.c.pod_id
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col_pod_id_pkey = pods.c.pod_id
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# In the migration script 003_shadow_agent.py, the pod_id string length in
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# shadow_agents table is 64, but pod_id string length in pods table
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# is 36. The string length in foreign key and primary key isn't the same
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if col_pod_id_fkey.type.length != col_pod_id_pkey.type.length:
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# Delete the old foreign key constraint. If it exists, we can't
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# modify the pod_id length.
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migrate.ForeignKeyConstraint(columns=[shadow_agents.c.pod_id],
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refcolumns=[pods.c.pod_id]).drop()
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col_pod_id_fkey.alter(type=String(col_pod_id_pkey.type.length))
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# Create the foreign key constraint
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migrate.ForeignKeyConstraint(columns=[shadow_agents.c.pod_id],
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refcolumns=[pods.c.pod_id]).create()
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