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Drop constraint (#17275)
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@ -28,9 +28,30 @@ down_revision = "32646df09c64"
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import sqlalchemy as sa
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import sqlalchemy as sa
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from alembic import op
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from alembic import op
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from sqlalchemy.engine.reflection import Inspector
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def upgrade():
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def upgrade():
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try:
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with op.batch_alter_table("dbs") as batch_op:
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batch_op.alter_column(
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"allow_csv_upload",
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new_column_name="allow_file_upload",
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existing_type=sa.Boolean(),
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)
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except sa.exc.OperationalError:
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# In MySQL 8.0 renaming the column rename fails because it has
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# a constraint check; we can safely remove it in that case, see
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# https://github.com/sqlalchemy/alembic/issues/699
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bind = op.get_bind()
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inspector = Inspector.from_engine(bind)
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check_constraints = inspector.get_check_constraints("dbs")
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for check_constraint in check_constraints:
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if "allow_csv_upload" in check_constraint["sqltext"]:
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name = check_constraint["name"]
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op.drop_constraint(name, table_name="dbs", type_="check")
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# try again
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with op.batch_alter_table("dbs") as batch_op:
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with op.batch_alter_table("dbs") as batch_op:
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batch_op.alter_column(
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batch_op.alter_column(
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"allow_csv_upload",
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"allow_csv_upload",
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