From c31ad577a6945b189484ad2172436eb3f50189d7 Mon Sep 17 00:00:00 2001
From: Daniel Roth <daniel_roth@hotmail.co.uk>
Date: Thu, 12 Feb 2026 12:44:18 +0000
Subject: [PATCH] define class methods to construct domain classes from
 sqlalchemy models

---
 backend/domain/plan.py     | 9 ++++++++-
 backend/domain/scenario.py | 7 +++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/backend/domain/plan.py b/backend/domain/plan.py
index b14213c1..b3411b10 100644
--- a/backend/domain/plan.py
+++ b/backend/domain/plan.py
@@ -1,8 +1,9 @@
+from __future__ import annotations
 from datetime import datetime
 from typing import Optional
 
 from backend.app.db.models.portfolio import Epc
-from backend.app.db.models.recommendations import PlanTypeEnum
+from backend.app.db.models.recommendations import PlanModel, PlanTypeEnum, ScenarioModel
 from backend.domain.scenario import Scenario
 
 
@@ -28,3 +29,9 @@ class Plan:
     valuation_increase: Optional[float] = None
     cost_of_works: Optional[float] = None
     contingency_cost: Optional[float] = None
+
+    @classmethod
+    def from_sqlalchemy(
+        cls, plan_model: PlanModel, scenario_model: ScenarioModel
+    ) -> Plan:
+        raise NotImplementedError
diff --git a/backend/domain/scenario.py b/backend/domain/scenario.py
index 4a15fc09..f4d639cb 100644
--- a/backend/domain/scenario.py
+++ b/backend/domain/scenario.py
@@ -1,6 +1,9 @@
+from __future__ import annotations
 from datetime import datetime
 from typing import Optional
 
+from backend.app.db.models.recommendations import ScenarioModel
+
 
 class Scenario:
     name: str
@@ -44,3 +47,7 @@ class Scenario:
     valuation_return_on_ivestment: Optional[str] = None
     property_valuation_increase: Optional[float] = None
     labour_days: Optional[float] = None
+
+    @classmethod
+    def from_sqlalchemy(cls, scenario_model: ScenarioModel) -> Scenario:
+        raise NotImplementedError