M8-T08: add WarmteLink reading schema

2026-08-23 21:22:05 +02:00
parent ffc693e995
commit 25a08c47a4
5 changed files with 344 additions and 2 deletions
@@ -0,0 +1,52 @@
+"""add normalized WarmteLink scalar reading history
+
+Revision ID: 20260822_17_warmtelink_readings
+Revises: 20260822_16_dsmr_source_adoption
+Create Date: 2026-08-22 00:00:00.000000
+
+The upgrade is additive: existing business rows are neither changed nor
+removed.  The downgrade is schema-only and is exercised only on isolated test
+databases.
+"""
+
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+
+revision: str = "20260822_17_warmtelink_readings"
+down_revision: Union[str, None] = "20260822_16_dsmr_source_adoption"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "warmtelink_reading",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("channel_id", sa.Integer(), nullable=False),
+        sa.Column("recorded_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("received_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("value", sa.Numeric(precision=15, scale=3), nullable=False),
+        sa.Column("unit", sa.String(length=32), nullable=False),
+        sa.Column("quality", sa.String(length=32), nullable=False),
+        sa.Column("equipment_fingerprint", sa.String(length=64), nullable=False),
+        sa.CheckConstraint(
+            "quality IN ('valid', 'invalid', 'unverifiable')",
+            name="ck_warmtelink_reading_quality",
+        ),
+        sa.ForeignKeyConstraint(
+            ["channel_id"], ["meter_source_channel.id"], ondelete="RESTRICT"
+        ),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint(
+            "channel_id", "recorded_at", name="uq_warmtelink_reading_channel_recorded_at"
+        ),
+    )
+    op.create_index("ix_warmtelink_reading_recorded_at", "warmtelink_reading", ["recorded_at"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_warmtelink_reading_recorded_at", table_name="warmtelink_reading")
+    op.drop_table("warmtelink_reading")