70 lines
2.4 KiB
Python
70 lines
2.4 KiB
Python
from __future__ import annotations
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from datetime import datetime
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from typing import TYPE_CHECKING
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from .enums import DistributionType, ResourceType, StochasticVariable, sql_enum
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from sqlalchemy import (
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JSON,
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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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)
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from sqlalchemy.orm import Mapped, mapped_column, relationship
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from sqlalchemy.sql import func
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from config.database import Base
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if TYPE_CHECKING: # pragma: no cover
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from .scenario import Scenario
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class SimulationParameter(Base):
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"""Probability distribution settings for scenario simulations."""
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__tablename__ = "simulation_parameters"
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id: Mapped[int] = mapped_column(Integer, primary_key=True)
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scenario_id: Mapped[int] = mapped_column(
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ForeignKey("scenarios.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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distribution: Mapped[DistributionType] = mapped_column(
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sql_enum(DistributionType, name="distributiontype"), nullable=False
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)
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variable: Mapped[StochasticVariable | None] = mapped_column(
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sql_enum(StochasticVariable, name="stochasticvariable"), nullable=True
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)
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resource_type: Mapped[ResourceType | None] = mapped_column(
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sql_enum(ResourceType, name="resourcetype"), nullable=True
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)
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mean_value: Mapped[float | None] = mapped_column(
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Numeric(18, 4), nullable=True)
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standard_deviation: Mapped[float | None] = mapped_column(
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Numeric(18, 4), nullable=True)
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minimum_value: Mapped[float | None] = mapped_column(
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Numeric(18, 4), nullable=True)
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maximum_value: Mapped[float | None] = mapped_column(
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Numeric(18, 4), nullable=True)
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unit: Mapped[str | None] = mapped_column(String(32), nullable=True)
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configuration: Mapped[dict | None] = mapped_column(JSON, nullable=True)
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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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scenario: Mapped["Scenario"] = relationship(
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"Scenario", back_populates="simulation_parameters"
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)
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def __repr__(self) -> str: # pragma: no cover
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return (
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f"SimulationParameter(id={self.id!r}, scenario_id={self.scenario_id!r}, "
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f"name={self.name!r})"
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)
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