如何写联接在Django,我已经通过下面的Django文档,但是接缝是不工作的我的模型如何在django中写入连接?
http://docs.djangoproject.com/en/1.2/topics/db/queries/#lookups-that-span-relationships
和模型/ MANY_TO_MANY/
和一些博客
我的型号:
class Profile(models.Model):
name = models.CharField(max_length=50, primary_key=True)
assign = models.CharField(max_length=50)
doj = models.DateField()
dob = models.DateField()
class Meta:
db_table = u'profile'
def __str__(self):
return '%s %s %s %s' % (self.name,self.assign,self.doj,self.dob)
def __unicode__(self):
return u'%s %s %s %s' % (self.name,self.assign,self.doj,self.dob)
enter code here
class working(models.Model):
w_name =models.ForeignKey(Profile, db_column='w_name')
monday = models.IntegerField(null=True, db_column='monday', blank=True)
tuesday = models.IntegerField(null=True, db_column='tuesday', blank=True)
wednesday = models.IntegerField(null=True, db_column='wednesday', blank=True)
class Meta:
db_table = u'working'
def __str__(self):
return '%s %s %s %s' % (self.w_name,self.monday,self.tuesday,self.wednesday)
def __unicode__(self):
return u'%s %s %s %s' % (self.w_name,self.monday,self.tuesday,self.wednesday)
我想在两个表格之间进行连接和workingday
like m=working.objects.filter(name='sushanth').select_related()
如果我上面的查询运行我会得到
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/usr/lib/pymodules/python2.6/django/db/models/manager.py", line 129, in filter
return self.get_query_set().filter(*args, **kwargs)
File "/usr/lib/pymodules/python2.6/django/db/models/query.py", line 498, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "/usr/lib/pymodules/python2.6/django/db/models/query.py", line 516, in _filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "/usr/lib/pymodules/python2.6/django/db/models/sql/query.py", line 1675, in add_q
can_reuse=used_aliases)
File "/usr/lib/pymodules/python2.6/django/db/models/sql/query.py", line 1569, in add_filter
negate=negate, process_extras=process_extras)
File "/usr/lib/pymodules/python2.6/django/db/models/sql/query.py", line 1737, in setup_joins
"Choices are: %s" % (name, ", ".join(names)))
FieldError: Cannot resolve keyword 'name' into field. Choices are: monday, tuesday, wednesday, w_name
我需要查询,我可以参加工作和个人资料。
支持
select working.*,profile.assign,profile.doj from working join profile where name=w_name ;
我知道Django的不支持连接,内部连接也没有问题啊。
任何人都可以帮助这.........................?
@ user593132:使代码是可读的,请格式化你的问题(的`{}`按钮),否则是很难看的。 – 2011-01-28 01:34:42
让我建议你为'工作'模型提供一个更好的名字:`WorkSchedule`。始终使用CamelCase作为模型名称。你的w_name列应该被命名为`profile`,它指向配置文件,而不是名字。如果没有大的理由,不要更改db_columnt和db_table名称。 – Ski 2011-01-28 03:06:16