Sqlalchemy group_by

Question

目前我需要使用此查询：

SELECT name FROM persons WHERE persons."valid"=TRUE GROUP BY "name" ORDER BY name ASC LIMIT 10;

我需要将 group_by 添加到我的Sqlalchemy：

   persons = Model.Person.query.with_entities(Model.Person.name).filter(
                    Model.Person.valid.is_(True)).order_by(
                    asc(Model.Person.name)).limit(settings.items_per_page).all()

我需要添加group_by，因为我的结果包含重复的选项：

{
  "persons": [
    {
      "name": "Akshay"
    }, 
    {
      "name": "Akshay Navle"
    }, 
    {
      "name": "Alexa"
    }, 
    {
      "name": "Alexa"
    }, 
    {
      "name": "Alexa"
    }, 
    {
      "name": "Alexa"
    }, 
    {
      "name": "Alexa"
    }, 
    {
      "name": "Alexa"
    }, 
    {
      "name": "Americans"
    }, 
    {
      "name": "Americans"
    }
  ]
}

我试过了：

persons = Model.Person.query.with_entities(Model.Person.name).filter(
                    Model.Person.valid.is_(True)).order_by(
                    asc(Model.Person.name)).limit(settings.items_per_page).group_by(Model.Person.name).all()

但是得到空结果，有什么建议吗？