refactor(database): re-structure

app/database/team.py

@@ -0,0 +1,35 @@
+# ruff: noqa: I002
+from datetime import datetime
+from typing import TYPE_CHECKING
+
+from sqlalchemy import Column, DateTime
+from sqlmodel import Field, Relationship, SQLModel
+
+if TYPE_CHECKING:
+    from .user import User
+class Team(SQLModel, table=True):
+    __tablename__ = "teams"  # pyright: ignore[reportAssignmentType]
+
+    id: int | None = Field(default=None, primary_key=True, index=True)
+    name: str = Field(max_length=100)
+    short_name: str = Field(max_length=10)
+    flag_url: str | None = Field(default=None, max_length=500)
+    created_at: datetime = Field(
+        default_factory=datetime.utcnow, sa_column=Column(DateTime)
+    )
+
+    members: list["TeamMember"] = Relationship(back_populates="team")
+
+
+class TeamMember(SQLModel, table=True):
+    __tablename__ = "team_members"  # pyright: ignore[reportAssignmentType]
+
+    id: int | None = Field(default=None, primary_key=True, index=True)
+    user_id: int = Field(foreign_key="users.id")
+    team_id: int = Field(foreign_key="teams.id")
+    joined_at: datetime = Field(
+        default_factory=datetime.utcnow, sa_column=Column(DateTime)
+    )
+
+    user: "User" = Relationship(back_populates="team_membership")
+    team: "Team" = Relationship(back_populates="members")