108 lines
5.3 KiB
Python
108 lines
5.3 KiB
Python
"""add protocol-agnostic meter source, channel, and binding tables
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Revision ID: 20260822_15_meter_sources
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Revises: 20260625_14_meter_uuid
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Create Date: 2026-08-22 00:00:00.000000
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This revision is additive on upgrade. It deliberately does not backfill
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existing DSMR data; that adoption is a later, separately audited migration.
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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_15_meter_sources"
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down_revision: Union[str, None] = "20260625_14_meter_uuid"
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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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"meter_source",
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sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
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sa.Column("uuid", sa.String(length=36), nullable=False),
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sa.Column("name", sa.String(length=255), nullable=False),
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sa.Column("kind", sa.String(length=64), nullable=False),
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sa.Column("enabled", sa.Boolean(), nullable=False),
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sa.Column("config", sa.JSON(), nullable=False),
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sa.Column("status", sa.String(length=32), nullable=False),
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sa.Column("last_seen_at", sa.DateTime(timezone=True), nullable=True),
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sa.Column("last_error", sa.String(length=1024), nullable=True),
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sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
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sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
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sa.PrimaryKeyConstraint("id"),
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sa.UniqueConstraint("uuid", name="uq_meter_source_uuid"),
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)
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op.create_index("ix_meter_source_kind_enabled", "meter_source", ["kind", "enabled"])
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op.create_table(
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"meter_source_channel",
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sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
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sa.Column("uuid", sa.String(length=36), nullable=False),
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sa.Column("source_id", sa.Integer(), nullable=False),
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sa.Column("channel_key", sa.String(length=128), nullable=False),
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sa.Column("label", sa.String(length=255), nullable=False),
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sa.Column("suggested_commodity", sa.String(length=32), nullable=True),
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sa.Column("unit", sa.String(length=32), nullable=False),
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sa.Column("device_type", sa.String(length=64), nullable=True),
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sa.Column("fingerprint", sa.String(length=64), nullable=True),
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sa.Column("latest_value", sa.Numeric(precision=20, scale=6), nullable=True),
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sa.Column("latest_at", sa.DateTime(timezone=True), nullable=True),
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sa.Column("latest_quality", sa.String(length=32), nullable=True),
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sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
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sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
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sa.ForeignKeyConstraint(["source_id"], ["meter_source.id"], ondelete="RESTRICT"),
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sa.PrimaryKeyConstraint("id"),
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sa.UniqueConstraint("uuid", name="uq_meter_source_channel_uuid"),
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sa.UniqueConstraint("source_id", "channel_key", name="uq_meter_source_channel_source_key"),
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)
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op.create_index("ix_meter_source_channel_source_id", "meter_source_channel", ["source_id"])
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op.create_table(
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"meter_source_binding",
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sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
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sa.Column("uuid", sa.String(length=36), nullable=False),
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sa.Column("meter_id", sa.Integer(), nullable=False),
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sa.Column("channel_id", sa.Integer(), nullable=False),
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sa.Column("started_at", sa.DateTime(timezone=True), nullable=False),
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sa.Column("ended_at", sa.DateTime(timezone=True), nullable=True),
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sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
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sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
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sa.ForeignKeyConstraint(["meter_id"], ["meter.id"], ondelete="RESTRICT"),
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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("uuid", name="uq_meter_source_binding_uuid"),
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)
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op.create_index("ix_meter_source_binding_meter_id", "meter_source_binding", ["meter_id"])
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op.create_index("ix_meter_source_binding_channel_id", "meter_source_binding", ["channel_id"])
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with op.batch_alter_table("energy_cost_period", schema=None) as batch_op:
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batch_op.add_column(sa.Column("source_binding_id", sa.Integer(), nullable=True))
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batch_op.create_foreign_key(
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"fk_energy_cost_period_source_binding_id",
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"meter_source_binding",
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["source_binding_id"],
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["id"],
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ondelete="RESTRICT",
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)
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def downgrade() -> None:
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with op.batch_alter_table("energy_cost_period", schema=None) as batch_op:
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batch_op.drop_constraint("fk_energy_cost_period_source_binding_id", type_="foreignkey")
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batch_op.drop_column("source_binding_id")
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op.drop_index("ix_meter_source_binding_channel_id", table_name="meter_source_binding")
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op.drop_index("ix_meter_source_binding_meter_id", table_name="meter_source_binding")
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op.drop_table("meter_source_binding")
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op.drop_index("ix_meter_source_channel_source_id", table_name="meter_source_channel")
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op.drop_table("meter_source_channel")
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op.drop_index("ix_meter_source_kind_enabled", table_name="meter_source")
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op.drop_table("meter_source")
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