Peewee模型为JSON

Question

我正在使用peewee作为ORM创建API,我需要能够将peewee模型对象转换为JSON对象以发送给用户.有谁知道这样做的好方法？

Answer 1

Peewee拥有model_to_dict和dict_to_model佣工在playhouse.shortcuts扩展模块.

• http://docs.peewee-orm.com/en/latest/peewee/playhouse.html#model_to_dict
• http://docs.peewee-orm.com/en/latest/peewee/playhouse.html#dict_to_model

你可以使用如下:

from playhouse.shortcuts import model_to_dict, dict_to_model

user_obj = User.select().where(User.username == 'charlie').get()
json_data = json.dumps(model_to_dict(user_obj))

另请注意,model_to_dict()可以通过相关模型进行递归,包括反向引用模型,并排除某些字段被序列化.

Answer 2

单取时

user = User.select().where(User.id == 1).get()
model_to_dict(user)  #to Dict

当多取

users = list(User.select().where(User.name ** 'a%').dicts()) 

Answer 3

你可以这样做：

class MyModel(peewee.Model):

  def __str__(self):
    r = {}
    for k in self._data.keys():
      try:
         r[k] = str(getattr(self, k))
      except:
         r[k] = json.dumps(getattr(self, k))
    return str(r)


class User(MyModel):
    email = CharField()
    status = CharField(default="enabled")
    firstname = CharField()
    lastname = CharField()
    class Meta:
        database = db