67 lines
3.1 KiB
Python
67 lines
3.1 KiB
Python
"""water_v2: 新增 sar_scene_geo 和 flood_detections 表
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Revision ID: 0002
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Revises: 0001
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Create Date: 2026-02-25
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"""
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from typing import Sequence, Union
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import sqlalchemy as sa
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from alembic import op
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revision: str = "0002"
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down_revision: Union[str, None] = "0001"
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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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# 清理旧 water 表（如果存在）
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op.execute("DROP TABLE IF EXISTS flood_events CASCADE")
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op.execute("DROP TABLE IF EXISTS water_pairs CASCADE")
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op.execute("DROP TABLE IF EXISTS water_masks CASCADE")
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op.create_table(
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"sar_scene_geo",
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sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
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sa.Column("radar_data_id", sa.Integer(), nullable=False),
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sa.Column("geo_path", sa.String(), nullable=True),
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sa.Column("pixel_size_m", sa.Float(), nullable=True),
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sa.Column("status", sa.String(), nullable=False, server_default="PENDING"),
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sa.Column("error_msg", sa.Text(), nullable=True),
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sa.Column("created_at", sa.DateTime(), server_default=sa.text("now()"), nullable=True),
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sa.Column("updated_at", sa.DateTime(), server_default=sa.text("now()"), nullable=True),
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sa.ForeignKeyConstraint(["radar_data_id"], ["radar_data.id"]),
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sa.PrimaryKeyConstraint("id"),
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sa.UniqueConstraint("radar_data_id", name="uq_sar_scene_geo_radar"),
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)
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op.create_index("ix_sar_scene_geo_radar_data_id", "sar_scene_geo", ["radar_data_id"])
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op.create_index("ix_sar_scene_geo_status", "sar_scene_geo", ["status"])
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op.create_table(
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"flood_detections",
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sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
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sa.Column("pre_scene_id", sa.Integer(), nullable=False),
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sa.Column("post_scene_id", sa.Integer(), nullable=False),
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sa.Column("output_dir", sa.String(), nullable=True),
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sa.Column("classified_path", sa.String(), nullable=True),
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sa.Column("flood_area_km2", sa.Float(), nullable=True),
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sa.Column("stable_water_area_km2", sa.Float(), nullable=True),
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sa.Column("status", sa.String(), nullable=False, server_default="PENDING"),
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sa.Column("error_msg", sa.Text(), nullable=True),
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sa.Column("created_at", sa.DateTime(), server_default=sa.text("now()"), nullable=True),
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sa.Column("updated_at", sa.DateTime(), server_default=sa.text("now()"), nullable=True),
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sa.ForeignKeyConstraint(["pre_scene_id"], ["sar_scene_geo.id"]),
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sa.ForeignKeyConstraint(["post_scene_id"], ["sar_scene_geo.id"]),
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sa.PrimaryKeyConstraint("id"),
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sa.UniqueConstraint("pre_scene_id", "post_scene_id", name="uq_flood_detection_pair"),
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)
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op.create_index("ix_flood_detections_pre_scene_id", "flood_detections", ["pre_scene_id"])
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op.create_index("ix_flood_detections_post_scene_id", "flood_detections", ["post_scene_id"])
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op.create_index("ix_flood_detections_status", "flood_detections", ["status"])
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def downgrade() -> None:
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op.drop_table("flood_detections")
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op.drop_table("sar_scene_geo")
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