在Pydantic中定义递归模型？

from pydantic import BaseModel, Field, ForwardRef

# 创建一个ForwardRef对象，用于引用尚未定义的模型
RecursiveModel = ForwardRef('RecursiveModel')

class RecursiveModel(BaseModel):
    name: str
    children: List[RecursiveModel] = []

# 更新ForwardRef对象的实际引用
RecursiveModel.update_forward_refs()

# 创建递归模型的实例
model = RecursiveModel(name='root', children=[
    RecursiveModel(name='child1'),
    RecursiveModel(name='child2', children=[
        RecursiveModel(name='grandchild')
    ])
])

print(model)