"""implement host chains

Revision ID: 982867b533e6
Revises: 79271458a973
Create Date: 2024-12-15 04:27:44.704707

"""

import sqlalchemy as sa
from alembic import op

# revision identifiers, used by Alembic.
revision = "982867b533e6"
down_revision = "79271458a973"
branch_labels = None
depends_on = None


def upgrade() -> None:
    # ### commands auto generated by Alembic - please adjust! ###
    op.create_table(
        "host_chains",
        sa.Column("host_id", sa.Integer(), nullable=False),
        sa.Column("chained_host_id", sa.Integer(), nullable=True),
        sa.Column("seq", sa.Integer(), nullable=False),
        sa.ForeignKeyConstraint(
            ["chained_host_id"],
            ["hosts.id"],
        ),
        sa.ForeignKeyConstraint(
            ["host_id"],
            ["hosts.id"],
        ),
        sa.PrimaryKeyConstraint("host_id", "seq"),
    )
    # ### end Alembic commands ###


def downgrade() -> None:
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_table("host_chains")
    # ### end Alembic commands ###