airflow 0063_2_0_0_set_conn_type_as_non_nullable 源码
airflow 0063_2_0_0_set_conn_type_as_non_nullable 代码
文件路径：/airflow/migrations/versions/0063_2_0_0_set_conn_type_as_non_nullable.py
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# to you under the Apache License, Version 2.0 (the
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"""Set ``conn_type`` as non-nullable
Revision ID: 8f966b9c467a
Revises: 3c20cacc0044
Create Date: 2020-06-08 22:36:34.534121
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
from sqlalchemy.ext.declarative import declarative_base
# revision identifiers, used by Alembic.
revision = "8f966b9c467a"
down_revision = "3c20cacc0044"
branch_labels = None
depends_on = None
airflow_version = '2.0.0'
def upgrade():
"""Apply Set ``conn_type`` as non-nullable"""
Base = declarative_base()
class Connection(Base):
__tablename__ = "connection"
id = sa.Column(sa.Integer(), primary_key=True)
conn_id = sa.Column(sa.String(250))
conn_type = sa.Column(sa.String(500))
# Generate run type for existing records
connection = op.get_bind()
sessionmaker = sa.orm.sessionmaker()
session = sessionmaker(bind=connection)
# imap_default was missing it's type, let's fix that up
session.query(Connection).filter_by(conn_id="imap_default", conn_type=None).update(
{Connection.conn_type: "imap"}, synchronize_session=False
)
session.commit()
with op.batch_alter_table("connection", schema=None) as batch_op:
batch_op.alter_column("conn_type", existing_type=sa.VARCHAR(length=500), nullable=False)
def downgrade():
"""Unapply Set ``conn_type`` as non-nullable"""
with op.batch_alter_table("connection", schema=None) as batch_op:
batch_op.alter_column("conn_type", existing_type=sa.VARCHAR(length=500), nullable=True)
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