如何保存has_one关联的嵌套资源？不允许参数错误

# 主资源模型类
class MainResource < ApplicationRecord
  has_one :nested_resource
  accepts_nested_attributes_for :nested_resource
end

# 嵌套资源模型类
class NestedResource < ApplicationRecord
  belongs_to :main_resource
end

# 控制器中的保存操作
def create
  main_resource = MainResource.new(main_resource_params)
  nested_resource = NestedResource.new(nested_resource_params)
  
  main_resource.nested_resource = nested_resource
  
  if main_resource.save
    # 保存成功
  else
    # 保存失败
  end
end

private

def main_resource_params
  params.require(:main_resource).permit(:attribute1, :attribute2, nested_resource_attributes: [:attribute3, :attribute4])
end

def nested_resource_params
  params.require(:nested_resource).permit(:attribute3, :attribute4)
end