pyfedi/migrations/versions/d2bd6281a8d3_unique_community_ap_profile_id.py

"""unique community ap profile id

Revision ID: d2bd6281a8d3
Revises: d32ef1893ce4
Create Date: 2024-11-19 18:34:47.914982

"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy import text


# revision identifiers, used by Alembic.
revision = 'd2bd6281a8d3'
down_revision = 'd32ef1893ce4'
branch_labels = None
depends_on = None


def upgrade():
    # Find duplicate communities by ap_profile_id
    dupes_query = text('''
            SELECT ap_profile_id FROM "community" 
            GROUP BY ap_profile_id 
            HAVING COUNT(*) > 1
        ''')

    conn = op.get_bind()
    duplicate_profiles = conn.execute(dupes_query).scalars()
    print('Cleaning up duplicate communities, this may take a while...')

    for profile_id in duplicate_profiles:
        if profile_id is None:
            continue
        # Get all communities with the same ap_profile_id, ordered by ID
        users_query = text('''
                SELECT id FROM "community" 
                WHERE ap_profile_id = :ap_profile_id 
                ORDER BY id
            ''')
        users = conn.execute(users_query, {"ap_profile_id": profile_id}).fetchall()

        # Set the lowest ID as the new_id, and collect other IDs to update/delete
        new_id = users[0].id
        old_ids = [user.id for user in users[1:]]

        print(profile_id)

        if old_ids:
            # Update tables with batch IN clause
            conn.execute(text('UPDATE "post" SET community_id = :new_id WHERE community_id IN :old_ids'), {"new_id": new_id, "old_ids": tuple(old_ids)})
            conn.execute(text('UPDATE "post_reply" SET community_id = :new_id WHERE community_id IN :old_ids'), {"new_id": new_id, "old_ids": tuple(old_ids)})
            conn.execute(text('UPDATE "report" SET suspect_community_id = :new_id WHERE suspect_community_id IN :old_ids'), {"new_id": new_id, "old_ids": tuple(old_ids)})
            conn.execute(text('UPDATE "report" SET in_community_id = :new_id WHERE in_community_id IN :old_ids'), {"new_id": new_id, "old_ids": tuple(old_ids)})
            conn.execute(text('UPDATE "mod_log" SET community_id = :new_id WHERE community_id IN :old_ids'), {"new_id": new_id, "old_ids": tuple(old_ids)})
            conn.execute(text('DELETE FROM "community_block" WHERE community_id IN :old_ids'), {"old_ids": tuple(old_ids)})
            conn.execute(text('DELETE FROM "community_member" WHERE community_id IN :old_ids'), {"old_ids": tuple(old_ids)})
            conn.execute(text('DELETE FROM "community_ban" WHERE community_id IN :old_ids'), {"old_ids": tuple(old_ids)})
            conn.execute(text('DELETE FROM "community_join_request" WHERE community_id IN :old_ids'), {"old_ids": tuple(old_ids)})
            conn.execute(text('DELETE FROM "community_language" WHERE community_id IN :old_ids'), {"old_ids": tuple(old_ids)})

            # Delete the duplicate users
            conn.execute(text('DELETE FROM "community" WHERE id IN :old_ids'), {"old_ids": tuple(old_ids)})
    # ### commands auto generated by Alembic - please adjust! ###
    with op.batch_alter_table('community', schema=None) as batch_op:
        batch_op.drop_index('ix_community_ap_profile_id')
        batch_op.create_index(batch_op.f('ix_community_ap_profile_id'), ['ap_profile_id'], unique=True)

    # ### end Alembic commands ###


def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    with op.batch_alter_table('community', schema=None) as batch_op:
        batch_op.drop_index(batch_op.f('ix_community_ap_profile_id'))
        batch_op.create_index('ix_community_ap_profile_id', ['ap_profile_id'], unique=False)

    # ### end Alembic commands ###