57 lines
1.8 KiB
Python
57 lines
1.8 KiB
Python
from __future__ import annotations
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from datetime import datetime
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from enum import Enum
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from typing import TYPE_CHECKING, List
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from sqlalchemy import DateTime, Enum as SQLEnum, Integer, String, Text
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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 MiningOperationType(str, Enum):
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"""Supported mining operation categories."""
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OPEN_PIT = "open_pit"
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UNDERGROUND = "underground"
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IN_SITU_LEACH = "in_situ_leach"
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PLACER = "placer"
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QUARRY = "quarry"
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MOUNTAINTOP_REMOVAL = "mountaintop_removal"
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OTHER = "other"
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class Project(Base):
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"""Top-level mining project grouping multiple scenarios."""
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__tablename__ = "projects"
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id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
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name: Mapped[str] = mapped_column(String(255), nullable=False, unique=True)
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location: Mapped[str | None] = mapped_column(String(255), nullable=True)
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operation_type: Mapped[MiningOperationType] = mapped_column(
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SQLEnum(MiningOperationType), nullable=False, default=MiningOperationType.OTHER
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)
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description: Mapped[str | None] = mapped_column(Text, 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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scenarios: Mapped[List["Scenario"]] = relationship(
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"Scenario",
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back_populates="project",
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cascade="all, delete-orphan",
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passive_deletes=True,
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)
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def __repr__(self) -> str: # pragma: no cover - helpful for debugging
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return f"Project(id={self.id!r}, name={self.name!r})"
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