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79 lines
2.7 KiB
Python
79 lines
2.7 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain 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,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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"""empty message
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Revision ID: f231d82b9b26
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Revises: e68c4473c581
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Create Date: 2018-03-20 19:47:54.991259
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"""
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import sqlalchemy as sa
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from alembic import op
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from superset.utils.core import generic_find_uq_constraint_name
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# revision identifiers, used by Alembic.
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revision = "f231d82b9b26"
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down_revision = "e68c4473c581"
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conv = {"uq": "uq_%(table_name)s_%(column_0_name)s"}
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names = {"columns": "column_name", "metrics": "metric_name"}
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def upgrade():
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# Reduce the size of the metric_name column for constraint viability.
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with op.batch_alter_table("metrics", naming_convention=conv) as batch_op:
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batch_op.alter_column(
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"metric_name",
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existing_type=sa.String(length=512),
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type_=sa.String(length=255),
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existing_nullable=True,
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)
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# Add the missing uniqueness constraints.
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for table, column in names.items():
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with op.batch_alter_table(table, naming_convention=conv) as batch_op:
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batch_op.create_unique_constraint(
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"uq_{}_{}".format(table, column), [column, "datasource_id"]
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)
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def downgrade():
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bind = op.get_bind()
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insp = sa.engine.reflection.Inspector.from_engine(bind)
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# Restore the size of the metric_name column.
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with op.batch_alter_table("metrics", naming_convention=conv) as batch_op:
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batch_op.alter_column(
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"metric_name",
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existing_type=sa.String(length=255),
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type_=sa.String(length=512),
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existing_nullable=True,
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)
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# Remove the previous missing uniqueness constraints.
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for table, column in names.items():
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with op.batch_alter_table(table, naming_convention=conv) as batch_op:
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batch_op.drop_constraint(
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generic_find_uq_constraint_name(table, {column, "datasource_id"}, insp)
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or "uq_{}_{}".format(table, column),
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type_="unique",
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)
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