Initial commit

backend/app/models.py

@@ -0,0 +1,69 @@
+from datetime import datetime
+from sqlalchemy import DateTime, Float, ForeignKey, Integer, String, Text, UniqueConstraint
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from .database import Base
+
+
+class Student(Base):
+    __tablename__ = "students"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
+    first_name: Mapped[str] = mapped_column(String(100))
+    age: Mapped[int] = mapped_column(Integer)
+    grade: Mapped[str] = mapped_column(String(50))
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    messages = relationship("Message", back_populates="student", cascade="all, delete-orphan")
+    mastery = relationship("StudentSkillMastery", back_populates="student", cascade="all, delete-orphan")
+
+
+class Message(Base):
+    __tablename__ = "messages"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    student_id: Mapped[int] = mapped_column(ForeignKey("students.id"), index=True)
+    role: Mapped[str] = mapped_column(String(20))
+    content: Mapped[str] = mapped_column(Text)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    student = relationship("Student", back_populates="messages")
+
+
+class Skill(Base):
+    __tablename__ = "skills"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    code: Mapped[str] = mapped_column(String(100), unique=True)
+    subject: Mapped[str] = mapped_column(String(50))
+    label: Mapped[str] = mapped_column(String(255))
+    description: Mapped[str] = mapped_column(Text)
+
+
+class StudentSkillMastery(Base):
+    __tablename__ = "student_skill_mastery"
+    __table_args__ = (UniqueConstraint("student_id", "skill_id", name="uq_student_skill"),)
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    student_id: Mapped[int] = mapped_column(ForeignKey("students.id"), index=True)
+    skill_id: Mapped[int] = mapped_column(ForeignKey("skills.id"), index=True)
+    mastery_score: Mapped[float] = mapped_column(Float, default=50.0)
+    confidence: Mapped[float] = mapped_column(Float, default=0.2)
+    evidence_count: Mapped[int] = mapped_column(Integer, default=0)
+    updated_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    student = relationship("Student", back_populates="mastery")
+    skill = relationship("Skill")
+
+
+class AssessmentAttempt(Base):
+    __tablename__ = "assessment_attempts"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    student_id: Mapped[int] = mapped_column(ForeignKey("students.id"), index=True)
+    skill_code: Mapped[str] = mapped_column(String(100), index=True)
+    question: Mapped[str] = mapped_column(Text)
+    expected_answer: Mapped[str] = mapped_column(Text)
+    student_answer: Mapped[str] = mapped_column(Text)
+    is_correct: Mapped[int] = mapped_column(Integer)
+    feedback: Mapped[str] = mapped_column(Text)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)