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Added counter field and updated confirmation_id
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db_revisions/versions/6ec12afa5b37_add_counter_to_submission_table.py
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"""add counter to submission table | ||
Revision ID: 6ec12afa5b37 | ||
Revises: 26f11ac15b3c | ||
Create Date: 2024-10-28 10:52:22.353469 | ||
""" | ||
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from typing import Sequence, Union | ||
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from alembic import op | ||
import sqlalchemy as sa | ||
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# revision identifiers, used by Alembic. | ||
revision: str = "6ec12afa5b37" | ||
down_revision: Union[str, None] = "26f11ac15b3c" | ||
branch_labels: Union[str, Sequence[str], None] = None | ||
depends_on: Union[str, Sequence[str], None] = None | ||
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def upgrade() -> None: | ||
# create the new column as nullable so it doesn't error with existing data | ||
with op.batch_alter_table("submission", schema=None) as batch_op: | ||
batch_op.add_column(sa.Column("counter", sa.Integer, nullable=True)) | ||
batch_op.create_unique_constraint("unique_filing_counter", ["filing", "counter"]) | ||
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# run a counter of each submission in a given filing id, ordered by the submission id, | ||
# which is the PK incrementor. This will give us accurate counts of 1, 2, 3, ... for | ||
# each submission per filing id. | ||
conn = op.get_bind() | ||
conn.execute( | ||
sa.text( | ||
""" | ||
WITH counts AS ( | ||
SELECT id, filing, ROW_NUMBER() OVER (PARTITION BY filing ORDER BY id) AS row_num FROM submission | ||
) | ||
UPDATE submission SET counter = counts.row_num | ||
FROM counts | ||
WHERE submission.id = counts.id | ||
""" | ||
) | ||
) | ||
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# set the counter column to required now that existing data is set. | ||
with op.batch_alter_table("submission", schema=None) as batch_op: | ||
batch_op.alter_column("counter", nullable=False) | ||
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def downgrade() -> None: | ||
op.drop_constraint(constraint_name="unique_filing_counter", table_name="submission") | ||
op.drop_column("submission", "counter") |
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