53 lines
2.0 KiB
Python
53 lines
2.0 KiB
Python
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"""add normalized WarmteLink scalar reading history
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Revision ID: 20260822_17_warmtelink_readings
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Revises: 20260822_16_dsmr_source_adoption
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Create Date: 2026-08-22 00:00:00.000000
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The upgrade is additive: existing business rows are neither changed nor
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removed. The downgrade is schema-only and is exercised only on isolated test
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databases.
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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 = "20260822_17_warmtelink_readings"
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down_revision: Union[str, None] = "20260822_16_dsmr_source_adoption"
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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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op.create_table(
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"warmtelink_reading",
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sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
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sa.Column("channel_id", sa.Integer(), nullable=False),
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sa.Column("recorded_at", sa.DateTime(timezone=True), nullable=False),
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sa.Column("received_at", sa.DateTime(timezone=True), nullable=False),
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sa.Column("value", sa.Numeric(precision=15, scale=3), nullable=False),
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sa.Column("unit", sa.String(length=32), nullable=False),
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sa.Column("quality", sa.String(length=32), nullable=False),
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sa.Column("equipment_fingerprint", sa.String(length=64), nullable=False),
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sa.CheckConstraint(
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"quality IN ('valid', 'invalid', 'unverifiable')",
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name="ck_warmtelink_reading_quality",
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),
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sa.ForeignKeyConstraint(
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["channel_id"], ["meter_source_channel.id"], ondelete="RESTRICT"
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),
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sa.PrimaryKeyConstraint("id"),
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sa.UniqueConstraint(
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"channel_id", "recorded_at", name="uq_warmtelink_reading_channel_recorded_at"
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),
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)
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op.create_index("ix_warmtelink_reading_recorded_at", "warmtelink_reading", ["recorded_at"])
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def downgrade() -> None:
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op.drop_index("ix_warmtelink_reading_recorded_at", table_name="warmtelink_reading")
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op.drop_table("warmtelink_reading")
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