fix:bug

backend/app/models.py

@@ -0,0 +1,83 @@
+from datetime import datetime
+
+from sqlalchemy import (
+    Column,
+    DateTime,
+    ForeignKey,
+    Integer,
+    Numeric,
+    String,
+    Text,
+)
+from sqlalchemy.orm import relationship, Mapped, mapped_column
+
+from .db import Base
+
+
+class Customer(Base):
+    __tablename__ = "customers"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
+    name: Mapped[str] = mapped_column(String(255), nullable=False)
+    contact_info: Mapped[str | None] = mapped_column(String(512), nullable=True)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=datetime.utcnow, nullable=False
+    )
+
+    projects: Mapped[list["Project"]] = relationship(
+        "Project", back_populates="customer", cascade="all, delete-orphan"
+    )
+
+
+class Project(Base):
+    """
+    Project Archive: stores original requirement text and AI-generated solution.
+    """
+
+    __tablename__ = "projects"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
+    customer_id: Mapped[int] = mapped_column(
+        Integer, ForeignKey("customers.id", ondelete="CASCADE"), nullable=False, index=True
+    )
+    raw_requirement: Mapped[str] = mapped_column(Text, nullable=False)
+    ai_solution_md: Mapped[str | None] = mapped_column(Text, nullable=True)
+    status: Mapped[str] = mapped_column(String(50), default="draft", nullable=False)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=datetime.utcnow, nullable=False
+    )
+
+    customer: Mapped[Customer] = relationship("Customer", back_populates="projects")
+    quotes: Mapped[list["Quote"]] = relationship(
+        "Quote", back_populates="project", cascade="all, delete-orphan"
+    )
+
+
+class Quote(Base):
+    __tablename__ = "quotes"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
+    project_id: Mapped[int] = mapped_column(
+        Integer, ForeignKey("projects.id", ondelete="CASCADE"), nullable=False, index=True
+    )
+    total_amount: Mapped[Numeric] = mapped_column(Numeric(12, 2), nullable=False)
+    file_path: Mapped[str] = mapped_column(String(512), nullable=False)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=datetime.utcnow, nullable=False
+    )
+
+    project: Mapped[Project] = relationship("Project", back_populates="quotes")
+
+
+class FinanceRecord(Base):
+    __tablename__ = "finance_records"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
+    month: Mapped[str] = mapped_column(String(7), nullable=False, index=True)  # YYYY-MM
+    type: Mapped[str] = mapped_column(String(50), nullable=False)  # invoice / bank_receipt / ...
+    file_name: Mapped[str] = mapped_column(String(255), nullable=False)
+    file_path: Mapped[str] = mapped_column(String(512), nullable=False)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=datetime.utcnow, nullable=False
+    )
+