81 lines
2.1 KiB
Python
81 lines
2.1 KiB
Python
"""task dependencies
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Revision ID: 3c6a2d3df4a1
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Revises: 1d844b04ee06
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Create Date: 2026-02-06
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"""
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from __future__ import annotations
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from alembic import op
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import sqlalchemy as sa
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# revision identifiers, used by Alembic.
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revision = "3c6a2d3df4a1"
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down_revision = "1d844b04ee06"
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branch_labels = None
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depends_on = None
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def upgrade() -> None:
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op.create_table(
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"task_dependencies",
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sa.Column("id", sa.Uuid(), nullable=False),
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sa.Column("board_id", sa.Uuid(), nullable=False),
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sa.Column("task_id", sa.Uuid(), nullable=False),
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sa.Column("depends_on_task_id", sa.Uuid(), nullable=False),
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sa.Column("created_at", sa.DateTime(), nullable=False),
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sa.ForeignKeyConstraint(
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["board_id"],
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["boards.id"],
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ondelete="CASCADE",
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),
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sa.ForeignKeyConstraint(
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["task_id"],
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["tasks.id"],
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ondelete="CASCADE",
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),
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sa.ForeignKeyConstraint(
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["depends_on_task_id"],
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["tasks.id"],
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ondelete="CASCADE",
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),
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sa.PrimaryKeyConstraint("id"),
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sa.UniqueConstraint(
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"task_id",
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"depends_on_task_id",
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name="uq_task_dependencies_task_id_depends_on_task_id",
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),
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sa.CheckConstraint(
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"task_id <> depends_on_task_id",
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name="ck_task_dependencies_no_self",
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),
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)
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op.create_index(
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"ix_task_dependencies_board_id",
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"task_dependencies",
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["board_id"],
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unique=False,
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)
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op.create_index(
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"ix_task_dependencies_task_id",
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"task_dependencies",
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["task_id"],
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unique=False,
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)
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op.create_index(
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"ix_task_dependencies_depends_on_task_id",
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"task_dependencies",
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["depends_on_task_id"],
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unique=False,
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)
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def downgrade() -> None:
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op.drop_index("ix_task_dependencies_depends_on_task_id", table_name="task_dependencies")
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op.drop_index("ix_task_dependencies_task_id", table_name="task_dependencies")
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op.drop_index("ix_task_dependencies_board_id", table_name="task_dependencies")
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op.drop_table("task_dependencies")
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