Question

我有一张这样的表：

+----+----------+----------+----------------+----------------------------------+
| id | users_id | files_id | shared_user_id | shared_date                      |
+----+----------+----------+----------------+----------------------------------+
|  3 |        1 |        1 |              2 | 2013-01-31 14:27:06.523908+00:00 |
|  2 |        1 |        1 |              2 | 2013-01-31 14:25:37.760192+00:00 |
|  4 |        1 |        3 |              2 | 2013-01-31 14:46:01.089560+00:00 |
|  5 |        1 |        1 |              3 | 2013-01-31 14:50:54.917337+00:00 |

现在我想知道共享该文件的每个文件的所有者。对于文件1，users_id为1.我想从默认的Django auth_user表中获取users_id 1的名称。我想获取每个文件的用户名。我怎么能这样做？

#models.py
from django.db import models
from django.contrib.auth.models import User

class File(models.Model):
    users = models.ForeignKey(User)
    file_name = models.CharField(max_length=100)
    type = models.CharField(max_length=10)
    source = models.CharField(max_length=100)
    start_date = models.TextField()
    end_date = models.TextField()
    duration = models.TextField()
    size_overview = models.IntegerField()
    size = models.TextField()
    flag = models.TextField()
    #delete_date = models.CharField(max_length=100, null=True, blank=True)

class Share(models.Model):
    users = models.ForeignKey(User)
    files = models.ForeignKey(File)
    shared_user_id = models.IntegerField()
    shared_date = models.TextField()

class Host(models.Model):
    name = models.TextField()
    full_path = models.TextField()

Answer 1

正如我之前所说，你的模型结构有点奇怪 - 特别是Share.shared_user应该是ForeignKey，而不是IntegerField。在这种情况下，您可以使用users作为File表格，User从Share到through，将class File(models.Model): users = models.ManyToManyField(User, through='Share')设置为File来提供帮助：

my_file.users.count()

现在给出一个{{1}}个实例，您可以这样做：

{{1}}

如何知道在Django中在此上下文中共享此文件的所有者？

1 个答案: