WIP checkpoint: Trust & Safety: Moderation data model + Alembic migration
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"""add moderation tables and extend users table
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Revision ID: 0003_moderation
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Revises: 0002_add_date_of_birth_to_users
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Create Date: 2025-01-01 00:00:00.000000
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"""
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from typing import Sequence, Union
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from alembic import op
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import sqlalchemy as sa
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from sqlalchemy.dialects import postgresql
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# revision identifiers, used by Alembic.
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revision: str = "0003_moderation"
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down_revision: Union[str, None] = "0002_add_date_of_birth_to_users"
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branch_labels: Union[str, Sequence[str], None] = None
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depends_on: Union[str, Sequence[str], None] = None
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def upgrade() -> None:
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"""Add role, banned_until, suspended_until to users table
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and create reports, moderation_actions, appeals tables."""
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# --- Extend users table ---
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# Add role column as ENUM
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op.execute(
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"CREATE TYPE user_role AS ENUM ('user', 'moderator', 'admin')"
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)
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op.add_column(
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"users",
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sa.Column(
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"role",
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postgresql.ENUM("user", "moderator", "admin", name="user_role", create_type=False),
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nullable=False,
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server_default="user",
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),
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)
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# Add banned_until column
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op.add_column(
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"users",
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sa.Column("banned_until", sa.DateTime(timezone=True), nullable=True),
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)
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# Add suspended_until column
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op.add_column(
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"users",
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sa.Column("suspended_until", sa.DateTime(timezone=True), nullable=True),
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)
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# --- Create reports table ---
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op.create_table(
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"reports",
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sa.Column("id", sa.Integer(), primary_key=True),
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sa.Column("reporter_id", sa.Integer(), sa.ForeignKey("users.id"), nullable=False),
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sa.Column(
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"target_type",
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postgresql.ENUM("user", "world", "asset", "chat_message", name="report_target_type", create_type=False),
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nullable=False,
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),
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sa.Column("target_id", sa.String(64), nullable=False),
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sa.Column(
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"reason_category",
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postgresql.ENUM(
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"harassment", "hate_speech", "sexual_content",
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"violence", "spam", "self_harm", "other",
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name="report_reason_category", create_type=False,
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),
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nullable=False,
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),
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sa.Column("details", sa.Text(), nullable=True),
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sa.Column(
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"status",
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postgresql.ENUM("open", "in_review", "resolved", "dismissed", name="report_status", create_type=False),
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nullable=False,
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server_default="open",
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),
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sa.Column("resolved_by", sa.Integer(), sa.ForeignKey("users.id"), nullable=True),
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sa.Column(
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"resolution",
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postgresql.ENUM("warn", "suspend", "ban", "restrict", "remove", name="report_resolution", create_type=False),
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nullable=True,
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),
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sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
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sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
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sa.Column("resolved_at", sa.DateTime(timezone=True), nullable=True),
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)
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# Indexes for reports
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op.create_index("ix_reports_reporter_id", "reports", ["reporter_id"])
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op.create_index("ix_reports_target", "reports", ["target_type", "target_id"])
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op.create_index("ix_reports_status", "reports", ["status"])
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# --- Create moderation_actions table ---
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op.create_table(
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"moderation_actions",
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sa.Column("id", sa.Integer(), primary_key=True),
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sa.Column("moderator_id", sa.Integer(), sa.ForeignKey("users.id"), nullable=False),
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sa.Column("target_user_id", sa.Integer(), sa.ForeignKey("users.id"), nullable=True),
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sa.Column(
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"target_type",
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postgresql.ENUM("user", "world", "asset", "chat_message", name="moderation_target_type", create_type=False),
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nullable=False,
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),
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sa.Column("target_id", sa.String(64), nullable=False),
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sa.Column(
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"action",
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postgresql.ENUM("warn", "suspend", "ban", "restrict", "remove", "restore", name="moderation_action_type", create_type=False),
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nullable=False,
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),
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sa.Column("reason", sa.Text(), nullable=True),
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sa.Column("report_id", sa.Integer(), sa.ForeignKey("reports.id"), nullable=True),
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sa.Column("expires_at", sa.DateTime(timezone=True), nullable=True),
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sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
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)
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# Indexes for moderation_actions
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op.create_index("ix_moderation_actions_moderator_id", "moderation_actions", ["moderator_id"])
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op.create_index("ix_moderation_actions_target_user", "moderation_actions", ["target_user_id"])
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op.create_index("ix_moderation_actions_target", "moderation_actions", ["target_type", "target_id"])
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op.create_index("ix_moderation_actions_report_id", "moderation_actions", ["report_id"])
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# --- Create appeals table ---
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op.create_table(
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"appeals",
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sa.Column("id", sa.Integer(), primary_key=True),
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sa.Column("moderation_action_id", sa.Integer(), sa.ForeignKey("moderation_actions.id"), nullable=False),
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sa.Column("user_id", sa.Integer(), sa.ForeignKey("users.id"), nullable=False),
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sa.Column("reason", sa.Text(), nullable=False),
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sa.Column(
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"status",
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postgresql.ENUM("pending", "approved", "rejected", name="appeal_status", create_type=False),
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nullable=False,
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server_default="pending",
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),
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sa.Column("reviewed_by", sa.Integer(), sa.ForeignKey("users.id"), nullable=True),
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sa.Column("reviewed_at", sa.DateTime(timezone=True), nullable=True),
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sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
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)
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# Indexes for appeals
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op.create_index("ix_appeals_moderation_action_id", "appeals", ["moderation_action_id"])
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op.create_index("ix_appeals_user_id", "appeals", ["user_id"])
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op.create_index("ix_appeals_status", "appeals", ["status"])
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def downgrade() -> None:
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"""Remove moderation tables and revert users table changes."""
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# Drop appeals table
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op.drop_index("ix_appeals_status", table_name="appeals")
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op.drop_index("ix_appeals_user_id", table_name="appeals")
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op.drop_index("ix_appeals_moderation_action_id", table_name="appeals")
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op.drop_table("appeals")
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# Drop moderation_actions table
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op.drop_index("ix_moderation_actions_report_id", table_name="moderation_actions")
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op.drop_index("ix_moderation_actions_target", table_name="moderation_actions")
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op.drop_index("ix_moderation_actions_target_user", table_name="moderation_actions")
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op.drop_index("ix_moderation_actions_moderator_id", table_name="moderation_actions")
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op.drop_table("moderation_actions")
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# Drop reports table
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op.drop_index("ix_reports_status", table_name="reports")
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op.drop_index("ix_reports_target", table_name="reports")
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op.drop_index("ix_reports_reporter_id", table_name="reports")
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op.drop_table("reports")
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# Remove columns from users table
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op.drop_column("users", "suspended_until")
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op.drop_column("users", "banned_until")
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op.drop_column("users", "role")
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# Drop the user_role enum type
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op.execute("DROP TYPE IF EXISTS user_role")
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# Drop other enum types created
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op.execute("DROP TYPE IF EXISTS report_target_type")
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op.execute("DROP TYPE IF EXISTS report_reason_category")
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op.execute("DROP TYPE IF EXISTS report_status")
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op.execute("DROP TYPE IF EXISTS report_resolution")
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op.execute("DROP TYPE IF EXISTS moderation_target_type")
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op.execute("DROP TYPE IF EXISTS moderation_action_type")
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op.execute("DROP TYPE IF EXISTS appeal_status")
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