Обновление приложения

backend/app/models/currency.py

@@ -0,0 +1,49 @@
+from datetime import datetime, date
+from decimal import Decimal
+from sqlalchemy import String, Boolean, Numeric, ForeignKey, Date, DateTime, UniqueConstraint, func
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from app.database import Base
+
+
+class Currency(Base):
+    __tablename__ = "currencies"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    code: Mapped[str] = mapped_column(String(3), unique=True, nullable=False)   # ISO 4217
+    name: Mapped[str] = mapped_column(String(100), nullable=False)
+    symbol: Mapped[str | None] = mapped_column(String(10))
+    is_active: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+
+    exchange_rates_from: Mapped[list["ExchangeRate"]] = relationship(
+        "ExchangeRate", foreign_keys="ExchangeRate.currency_from_id", back_populates="currency_from"
+    )
+    exchange_rates_to: Mapped[list["ExchangeRate"]] = relationship(
+        "ExchangeRate", foreign_keys="ExchangeRate.currency_to_id", back_populates="currency_to"
+    )
+    accounts: Mapped[list] = relationship("Account", back_populates="currency")
+    operations: Mapped[list] = relationship("Operation", back_populates="currency")
+    budgets: Mapped[list] = relationship("Budget", back_populates="currency")
+    calendar_events: Mapped[list] = relationship("CalendarEvent", back_populates="currency")
+
+
+class ExchangeRate(Base):
+    __tablename__ = "exchange_rates"
+    __table_args__ = (
+        UniqueConstraint("currency_from_id", "currency_to_id", "rate_date", name="uq_exchange_rate_day"),
+    )
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    currency_from_id: Mapped[int] = mapped_column(ForeignKey("currencies.id"), nullable=False)
+    currency_to_id: Mapped[int] = mapped_column(ForeignKey("currencies.id"), nullable=False)
+    rate: Mapped[Decimal] = mapped_column(Numeric(20, 6), nullable=False)
+    rate_date: Mapped[date] = mapped_column(Date, nullable=False)
+    source: Mapped[str | None] = mapped_column(String(100))
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+
+    currency_from: Mapped["Currency"] = relationship(
+        "Currency", foreign_keys=[currency_from_id], back_populates="exchange_rates_from"
+    )
+    currency_to: Mapped["Currency"] = relationship(
+        "Currency", foreign_keys=[currency_to_id], back_populates="exchange_rates_to"
+    )