我需要帮助为我的django模型选择相关字段，想要一个像列表一样可以包含多个项目的字段

Question

我正在做一个项目，其中用户可以添加一个事件，另一个用户可以自己注册该事件。每当用户注册活动时，我都想将其姓名添加到列表中。

我的型号：

class Event(models.Model):
Topic = CharField
participants =  # want a field here
# which can store
# multiple items
# that is the name
# of the user. So when
# the user
# registers a
# method appends
# the user name in this list.

Answer 1

您需要一个ManyToManyField来将用户链接到Events:

class Event(models.Model):
topic = CharField()
participants = models.ManyToManyField(User)

您也可以添加一个单独的"；通过"；表添加有关参与的额外信息：

class Event(models.Model):
topic = models.CharField()
participants = models.ManyToManyField(User, through='Participation')

class Participation(models.Model):
user = models.ForeignKey(User, on_delete=models.CASCADE)
event = models.ForeignKey(Event, on_delete=models.CASCADE)
date_joined = models.DateTimeField(auto_now_add=True)