✨ Add source examples for docs

docs_src/tutorial/code_structure/tutorial001/models.py

@@ -0,0 +1,21 @@
+from typing import List, Optional
+
+from sqlmodel import Field, Relationship, SQLModel
+
+
+class Team(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    name: str
+    headquarters: str
+
+    heroes: List["Hero"] = Relationship(back_populates="team")
+
+
+class Hero(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    name: str
+    secret_name: str
+    age: Optional[int] = None
+
+    team_id: Optional[int] = Field(default=None, foreign_key="team.id")
+    team: Optional[Team] = Relationship(back_populates="heroes")