Question

这很奇怪，这个查询

originator = User.objects.get(Q(emailaddress__email__exact=fromfield) | Q(phonenumber__exact=fromfield))

返回两个对象，当我单独查询时，我只得到一个对象。我不明白为什么会这样：（

    >>> originator = User.objects.get(emailaddress__email__exact=fromfield)
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/site/gruppe/lib/python2.7/site-packages/django/db/models/manager.py", line 143, in get
    return self.get_query_set().get(*args, **kwargs)
  File "/usr/site/gruppe/lib/python2.7/site-packages/django/db/models/query.py", line 401, in get
    (self.model._meta.object_name, kwargs))
DoesNotExist: GruppUser matching query does not exist. Lookup parameters were {'emailaddress__email__exact': 9135261967L}
>>> originator = User.objects.get(phonenumber__exact=fromfield)
>>> originator
<GruppUser: jorge>
>>> originator = User.objects.get(Q(emailaddress__email__exact=fromfield) | Q(phonenumber__exact=fromfield))
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/site/gruppe/lib/python2.7/site-packages/django/db/models/manager.py", line 143, in get
    return self.get_query_set().get(*args, **kwargs)
  File "/usr/site/gruppe/lib/python2.7/site-packages/django/db/models/query.py", line 405, in get
    (self.model._meta.object_name, num, kwargs))
MultipleObjectsReturned: get() returned more than one GruppUser -- it returned 2! Lookup parameters were {}

这是raw中的queryset sql：

(u'SELECT "gruppu_gruppuser"."password", "gruppu_gruppuser"."last_login", "gruppu_gruppuser"."is_superuser", "gruppu_gruppuser"."id", "gruppu_gruppuser"."username", "gruppu_gruppuser"."first_name", "gruppu_gruppuser"."last_name", "gruppu_gruppuser"."email", "gruppu_gruppuser"."is_staff", "gruppu_gruppuser"."is_active", "gruppu_gruppuser"."date_joined", "gruppu_gruppuser"."phonenumber", "gruppu_gruppuser"."mmsemail", "gruppu_gruppuser"."smsemail", "gruppu_gruppuser"."verified", "gruppu_gruppuser"."realname", "gruppu_gruppuser"."location", "gruppu_gruppuser"."website", "gruppu_gruppuser"."bio", "gruppu_gruppuser"."synctoFB" FROM "gruppu_gruppuser" LEFT OUTER JOIN "account_emailaddress" ON ("gruppu_gruppuser"."id" = "account_emailaddress"."user_id") WHERE ("account_emailaddress"."email" = %s  OR "gruppu_gruppuser"."phonenumber" = %s )', (u'9135261967', u'9135261967'))

它选择了同一个用户：

>>> queryset.all()
[<GruppUser: jorge>, <GruppUser: jorge>]

SQL真的选择了两个，这对我来说是黑魔法:(：

                                   password                                    |          last_login           | is_superuser | id | username | first_name | last_name |      email       | is_staff | is_active |      date_joined       | phonenumber |         mmsemail         |              smsemail              | verified | realname | location | website | bio | synctoFB 
-------------------------------------------------------------------------------+-------------------------------+--------------+----+----------+------------+-----------+------------------+----------+-----------+------------------------+-------------+--------------------------+------------------------------------+----------+----------+----------+---------+-----+----------
 xxxx | 2014-02-09 08:49:06.225694+04 | f            |  2 | jorge    | Jorge      | Sanchez   | x@x.c| f        | t         | 2013-10-08 14:53:16+04 | 9135261967  | 9135261967@xx | 9135261967@xx | t        |          | Prague   |         |     | t
 xxxx| 2014-02-09 08:49:06.225694+04 | f            |  2 | jorge    | Jorge      | Sanchez   | x@x.c | f        | t         | 2013-10-08 14:53:16+04 | 9135261967  | 9135261967@xx | 9135261967@xx | t        |          | Prague   |         |     | t
(2 rows)

Answer 1

尝试在查询结尾添加.distinct（）。如文档中所述.all（）不会消除重复的行，但.distinct（）会。

以下是相关文件： https://docs.djangoproject.com/en/dev/ref/models/querysets/#django.db.models.query.QuerySet.distinct

Django模型查询行为奇怪

1 个答案: