initial commit

backend/app/models.py

@@ -0,0 +1,52 @@
+"""FluentGerman.ai — Database models."""
+
+import enum
+from datetime import datetime, timezone
+
+from sqlalchemy import Boolean, DateTime, Enum, ForeignKey, String, Text
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.database import Base
+
+
+class InstructionType(str, enum.Enum):
+    GLOBAL = "global"
+    PERSONAL = "personal"
+    HOMEWORK = "homework"
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    username: Mapped[str] = mapped_column(String(50), unique=True, index=True)
+    email: Mapped[str] = mapped_column(String(255), unique=True, index=True)
+    hashed_password: Mapped[str] = mapped_column(String(255))
+    is_admin: Mapped[bool] = mapped_column(Boolean, default=False)
+    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )
+
+    instructions: Mapped[list["Instruction"]] = relationship(
+        back_populates="user", cascade="all, delete-orphan"
+    )
+
+
+class Instruction(Base):
+    __tablename__ = "instructions"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    user_id: Mapped[int | None] = mapped_column(
+        ForeignKey("users.id", ondelete="CASCADE"), nullable=True, index=True
+    )
+    title: Mapped[str] = mapped_column(String(200))
+    content: Mapped[str] = mapped_column(Text)
+    type: Mapped[InstructionType] = mapped_column(
+        Enum(InstructionType), default=InstructionType.PERSONAL
+    )
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
+    )
+
+    user: Mapped[User | None] = relationship(back_populates="instructions")