zwitschi
b1a6df9f90
- Introduced Pydantic schemas for profitability calculations in `schemas/calculations.py`. - Implemented service functions for profitability calculations in `services/calculations.py`. - Added new exception class `ProfitabilityValidationError` for handling validation errors. - Created repositories for managing project and scenario profitability snapshots. - Developed a utility script for verifying authenticated routes. - Added a new HTML template for the profitability calculator interface. - Implemented a script to fix user ID sequence in the database.
102 lines
3.6 KiB
Python
102 lines
3.6 KiB
Python
from __future__ import annotations
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from datetime import date, datetime
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from typing import TYPE_CHECKING, List
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from sqlalchemy import (
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Date,
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DateTime,
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ForeignKey,
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Integer,
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Numeric,
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String,
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Text,
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UniqueConstraint,
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)
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from sqlalchemy.orm import Mapped, mapped_column, relationship, validates
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from sqlalchemy.sql import func
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from config.database import Base
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from services.currency import normalise_currency
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from .enums import ResourceType, ScenarioStatus, sql_enum
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from .profitability_snapshot import ScenarioProfitability
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if TYPE_CHECKING: # pragma: no cover
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from .financial_input import FinancialInput
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from .project import Project
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from .simulation_parameter import SimulationParameter
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class Scenario(Base):
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"""A specific configuration of assumptions for a project."""
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__tablename__ = "scenarios"
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__table_args__ = (
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UniqueConstraint("project_id", "name",
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name="uq_scenarios_project_name"),
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)
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id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
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project_id: Mapped[int] = mapped_column(
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ForeignKey("projects.id", ondelete="CASCADE"), nullable=False, index=True
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)
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name: Mapped[str] = mapped_column(String(255), nullable=False)
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description: Mapped[str | None] = mapped_column(Text, nullable=True)
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status: Mapped[ScenarioStatus] = mapped_column(
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sql_enum(ScenarioStatus, name="scenariostatus"),
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nullable=False,
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default=ScenarioStatus.DRAFT,
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)
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start_date: Mapped[date | None] = mapped_column(Date, nullable=True)
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end_date: Mapped[date | None] = mapped_column(Date, nullable=True)
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discount_rate: Mapped[float | None] = mapped_column(
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Numeric(5, 2), nullable=True)
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currency: Mapped[str | None] = mapped_column(String(3), nullable=True)
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primary_resource: Mapped[ResourceType | None] = mapped_column(
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sql_enum(ResourceType, name="resourcetype"), nullable=True
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)
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created_at: Mapped[datetime] = mapped_column(
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DateTime(timezone=True), nullable=False, server_default=func.now()
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)
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updated_at: Mapped[datetime] = mapped_column(
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DateTime(timezone=True), nullable=False, server_default=func.now(), onupdate=func.now()
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)
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project: Mapped["Project"] = relationship(
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"Project", back_populates="scenarios")
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financial_inputs: Mapped[List["FinancialInput"]] = relationship(
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"FinancialInput",
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back_populates="scenario",
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cascade="all, delete-orphan",
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passive_deletes=True,
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)
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simulation_parameters: Mapped[List["SimulationParameter"]] = relationship(
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"SimulationParameter",
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back_populates="scenario",
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cascade="all, delete-orphan",
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passive_deletes=True,
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)
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profitability_snapshots: Mapped[List["ScenarioProfitability"]] = relationship(
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"ScenarioProfitability",
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back_populates="scenario",
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cascade="all, delete-orphan",
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order_by=lambda: ScenarioProfitability.calculated_at.desc(),
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passive_deletes=True,
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)
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@validates("currency")
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def _normalise_currency(self, key: str, value: str | None) -> str | None:
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# Normalise to uppercase ISO-4217; raises when the code is malformed.
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return normalise_currency(value)
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def __repr__(self) -> str: # pragma: no cover
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return f"Scenario(id={self.id!r}, name={self.name!r}, project_id={self.project_id!r})"
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@property
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def latest_profitability(self) -> "ScenarioProfitability | None":
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"""Return the most recent profitability snapshot for this scenario."""
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if not self.profitability_snapshots:
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return None
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return self.profitability_snapshots[0]
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