airflow 0033_1_10_0_fix_sqlite_foreign_key 源码
airflow 0033_1_10_0_fix_sqlite_foreign_key 代码
文件路径：/airflow/migrations/versions/0033_1_10_0_fix_sqlite_foreign_key.py
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# to you under the Apache License, Version 2.0 (the
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# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
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"""Fix Sqlite foreign key
Revision ID: 856955da8476
Revises: f23433877c24
Create Date: 2018-06-17 15:54:53.844230
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
# revision identifiers, used by Alembic.
revision = '856955da8476'
down_revision = 'f23433877c24'
branch_labels = None
depends_on = None
airflow_version = '1.10.0'
def upgrade():
"""Fix broken foreign-key constraint for existing SQLite DBs."""
conn = op.get_bind()
if conn.dialect.name == 'sqlite':
# Fix broken foreign-key constraint for existing SQLite DBs.
#
# Re-define tables and use copy_from to avoid reflection
# which would fail because referenced user table doesn't exist.
#
# Use batch_alter_table to support SQLite workaround.
chart_table = sa.Table(
'chart',
sa.MetaData(),
sa.Column('id', sa.Integer(), nullable=False),
sa.Column('label', sa.String(length=200), nullable=True),
sa.Column('conn_id', sa.String(length=250), nullable=False),
sa.Column('user_id', sa.Integer(), nullable=True),
sa.Column('chart_type', sa.String(length=100), nullable=True),
sa.Column('sql_layout', sa.String(length=50), nullable=True),
sa.Column('sql', sa.Text(), nullable=True),
sa.Column('y_log_scale', sa.Boolean(), nullable=True),
sa.Column('show_datatable', sa.Boolean(), nullable=True),
sa.Column('show_sql', sa.Boolean(), nullable=True),
sa.Column('height', sa.Integer(), nullable=True),
sa.Column('default_params', sa.String(length=5000), nullable=True),
sa.Column('x_is_date', sa.Boolean(), nullable=True),
sa.Column('iteration_no', sa.Integer(), nullable=True),
sa.Column('last_modified', sa.DateTime(), nullable=True),
sa.PrimaryKeyConstraint('id'),
)
with op.batch_alter_table('chart', copy_from=chart_table) as batch_op:
batch_op.create_foreign_key('chart_user_id_fkey', 'users', ['user_id'], ['id'])
def downgrade():
# Downgrade would fail because the broken FK constraint can't be re-created.
pass
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