python - 类型错误 : __init__() missing 1 required positional argument: 'model'

Question

初学者问题。我有一个基本上将帖子与用户相关联的类:

class Post(Model):
    timestamp = DateTimeField(default=datetime.datetime.now)
    user = ForeignKeyField(
        rel_model=User,
        related_name='posts'
        )
    content = TextField()

class Meta:
    database = DATABASE
    order_by = ('-timestamp',)

当它到达 'lated_name='posts' 行时，我收到此错误:

Traceback (most recent call last):
File "app.py", line 5, in <module>
import forms
File "/dev/forms.py", line 2, in <module>
from models import User
File "/dev/models.py", line 41, in <module>
class Post(Model):
File "/dev/models.py", line 45, in Post
related_name='posts'
TypeError: __init__() missing 1 required positional argument: 'model'

我使用的数据库是Sqlite(带有Peewee)。我不明白当 Model 是父类时，为什么它要求位置参数“model”。我错过了什么？

Answer 1

如果您使用的是 Peewee 3.x，则:

class Post(Model):
    timestamp = DateTimeField(default=datetime.datetime.now)
    user = ForeignKeyField(
        model=User,
        backref='posts')
    content = TextField()

    class Meta:
        database = DATABASE

注意:Peewee 3.x 不支持 Meta.order_by。