EV 충전 플랫폼 초기 백업
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app/models/__init__.py
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180
app/models/__init__.py
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"""DB 모델 정의"""
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from datetime import datetime
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from enum import Enum as PyEnum
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from sqlalchemy import (
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Column, Integer, BigInteger, String, Float, DateTime,
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Enum, ForeignKey, Text, Boolean, Index,
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)
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from sqlalchemy.orm import relationship
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from sqlalchemy.sql import func
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from app.database import Base
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# ── 상태 Enum ──
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class ChargerStatus(str, PyEnum):
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AVAILABLE = "Available"
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CHARGING = "Charging"
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FAULTED = "Faulted"
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UNAVAILABLE = "Unavailable"
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RESERVED = "Reserved"
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class SessionStatus(str, PyEnum):
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PENDING = "pending" # 결제 대기
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AUTHORIZED = "authorized" # 결제 승인, 충전 시작 대기
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CHARGING = "charging" # 충전 중
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COMPLETED = "completed" # 정상 종료
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FAILED = "failed" # 실패
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CANCELLED = "cancelled" # 취소
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class PaymentStatus(str, PyEnum):
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PENDING = "pending"
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CONFIRMED = "confirmed"
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FAILED = "failed"
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REFUNDED = "refunded"
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PARTIAL_REFUND = "partial_refund"
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# ── 충전기 ──
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class Charger(Base):
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__tablename__ = "chargers"
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id = Column(Integer, primary_key=True, autoincrement=True)
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charge_box_id = Column(String(64), unique=True, nullable=False, index=True,
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comment="OCPP chargeBoxId (Steve 등록명)")
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name = Column(String(128), comment="표시 이름 (예: A동 주차장 1번)")
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location = Column(String(256), comment="설치 위치")
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connector_count = Column(Integer, default=1)
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power_kw = Column(Float, default=7.0, comment="충전 용량 kW")
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status = Column(Enum(ChargerStatus), default=ChargerStatus.UNAVAILABLE)
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last_heartbeat = Column(DateTime(timezone=True))
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is_active = Column(Boolean, default=True)
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
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sessions = relationship("ChargingSession", back_populates="charger")
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def __repr__(self):
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return f"<Charger {self.charge_box_id} [{self.status}]>"
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# ── 충전 세션 ──
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class ChargingSession(Base):
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__tablename__ = "charging_sessions"
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__table_args__ = (
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Index("ix_session_charger_status", "charger_id", "status"),
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Index("ix_session_created", "created_at"),
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)
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id = Column(Integer, primary_key=True, autoincrement=True)
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session_uid = Column(String(64), unique=True, nullable=False, index=True,
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comment="고유 세션 ID (UUID)")
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charger_id = Column(Integer, ForeignKey("chargers.id"), nullable=False)
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connector_id = Column(Integer, default=1)
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# OCPP 트랜잭션 정보
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ocpp_transaction_id = Column(Integer, comment="Steve에서 발급한 transactionId")
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id_tag = Column(String(64), comment="OCPP 인증 태그")
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# 전력량 (Wh 단위)
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meter_start = Column(BigInteger, comment="시작 전력량 Wh")
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meter_stop = Column(BigInteger, comment="종료 전력량 Wh")
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charged_wh = Column(BigInteger, default=0, comment="충전된 전력량 Wh")
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last_meter_value = Column(BigInteger, comment="마지막 MeterValues Wh")
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# 요금
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electricity_cost = Column(Integer, default=0, comment="전기 원가 (원)")
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service_fee = Column(Integer, default=0, comment="서비스 수수료 (원)")
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total_bill = Column(Integer, default=0, comment="총 요금 (원)")
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# 시간
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status = Column(Enum(SessionStatus), default=SessionStatus.PENDING)
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started_at = Column(DateTime(timezone=True))
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stopped_at = Column(DateTime(timezone=True))
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
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charger = relationship("Charger", back_populates="sessions")
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payment = relationship("Payment", back_populates="session", uselist=False)
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def __repr__(self):
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return f"<Session {self.session_uid} [{self.status}]>"
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# ── 결제 ──
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class Payment(Base):
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__tablename__ = "payments"
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__table_args__ = (
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Index("ix_payment_order", "order_id"),
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)
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id = Column(Integer, primary_key=True, autoincrement=True)
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session_id = Column(Integer, ForeignKey("charging_sessions.id"), nullable=False)
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# 토스페이먼츠
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order_id = Column(String(128), unique=True, nullable=False,
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comment="토스 주문 ID")
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payment_key = Column(String(256), comment="토스 paymentKey")
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amount = Column(Integer, nullable=False, comment="결제 요청 금액 (원)")
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actual_amount = Column(Integer, comment="실제 충전 후 정산 금액")
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status = Column(Enum(PaymentStatus), default=PaymentStatus.PENDING)
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method = Column(String(32), comment="결제 수단 (카드, 간편결제 등)")
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card_company = Column(String(32), comment="카드사 이름")
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confirmed_at = Column(DateTime(timezone=True))
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refunded_at = Column(DateTime(timezone=True))
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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session = relationship("ChargingSession", back_populates="payment")
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def __repr__(self):
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return f"<Payment {self.order_id} [{self.status}]>"
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# ── 충전기 MeterValue 로그 ──
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class MeterValueLog(Base):
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"""실시간 MeterValues 로그 (디버깅/분석용)"""
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__tablename__ = "meter_value_logs"
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id = Column(BigInteger, primary_key=True, autoincrement=True)
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charger_id = Column(Integer, ForeignKey("chargers.id"), nullable=False)
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transaction_id = Column(Integer)
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connector_id = Column(Integer, default=1)
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measurand = Column(String(64), default="Energy.Active.Import.Register")
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value = Column(Float, nullable=False, comment="측정값")
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unit = Column(String(16), default="Wh")
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timestamp = Column(DateTime(timezone=True), server_default=func.now())
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# ── 사용자 ──
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class UserRole(str, PyEnum):
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ADMIN = "admin"
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OPERATOR = "operator"
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VIEWER = "viewer"
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class User(Base):
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__tablename__ = "users"
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id = Column(Integer, primary_key=True, autoincrement=True)
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username = Column(String(64), unique=True, nullable=False, index=True)
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hashed_password = Column(String(256), nullable=False)
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display_name = Column(String(128), comment="표시 이름")
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role = Column(Enum(UserRole), default=UserRole.VIEWER)
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is_active = Column(Boolean, default=True)
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last_login = Column(DateTime(timezone=True))
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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def __repr__(self):
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return f"<User {self.username} [{self.role}]>"
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