我寫了一個使用兩個不同數據庫的Django站點。一個是本地的,我們稱之爲「Django」,這個數據庫存儲了來自標準安裝的所有標準表 - auth,網站,評論等 - 以及一些額外的表格。Django中的非常獨立的數據庫中的「外鍵」
大部分數據(包括用戶)來自另一臺服務器上的數據庫,我們稱之爲「傳統」數據庫。
我在尋找關於連接兩個數據庫的乾淨,pythonic方式的建議,特別是關於用戶的。
我正在使用代理模型,該模型在我可以明確使用它的時候效果很好,但是當我作爲相關對象訪問用戶對象時遇到了問題(例如,當使用內置的django評論系統)。
下面的代碼是什麼樣子:
models.py:(指向Django的數據庫)
from django.db import models
from django.conf import settings
from django.contrib.auth.models import User as AuthUser, UserManager as AuthUserManager, AnonymousUser as AuthAnonymousUser
class UserPerson(models.Model):
user = models.OneToOneField(AuthUser, related_name="person")
person_id = models.PositiveIntegerField(verbose_name='Legacy ID')
def __unicode__(self):
return "%s" % self.get_person()
def get_person(self):
if not hasattr(self, '_person'):
from legacy_models import Person
from utils import get_person_model
Person = get_person_model() or Person
self._person = Person.objects.get(pk=self.person_id)
return self._person
person=property(get_person)
class UserManager(AuthUserManager):
def get_for_id(self, id):
return self.get(person__person_id=id)
def get_for_email(self, email):
try:
person = Person.objects.get(email=email)
return self.get_for_id(person.pk)
except Person.DoesNotExist:
return User.DoesNotExist
def create_user(self, username, email, password=None, *args, **kwargs):
user = super(UserManager,self).create_user(username, email, password, *args, **kwargs)
try:
person_id = Person.objects.get(email=email).pk
userperson, created = UserPerson.objects.get_or_create(user=user, person_id=person_id)
except Person.DoesNotExist:
pass
return user
class AnonymousUser(AuthAnonymousUser):
class Meta:
proxy = True
class User(AuthUser):
class Meta:
proxy=True
def get_profile(self):
"""
Returns the Person record from the legacy database
"""
if not hasattr(self, '_profile_cache'):
self._profile_cache = UserPerson.objects.get(user=self).person
return self._profile_cache
objects = UserManager()
legacy_models.py:(指向 「遺產」 數據庫)
class Person(models.Model):
id = models.AutoField(primary_key=True, db_column='PeopleID') # Field name made lowercase.
code = models.CharField(max_length=40, blank=True, db_column="person_code", unique=True)
first_name = models.CharField(max_length=50, db_column='firstName', blank=True) # Field name made lowercase.
last_name = models.CharField(max_length=50, db_column='lastName', blank=True) # Field name made lowercase.
email = models.CharField(max_length=255, blank=True)
def __unicode__(self):
return "%s %s" % (self.first_name, self.last_name)
def get_user(self):
from models import User
if not hasattr(self,'_user'):
self._user = User.objects.get_for_id(self.pk)
return self._user
user = property(get_user)
class Meta:
db_table = u'People'
我也掀起了自己的中間件,所以request.user
是pr氧還User
對象也。
真正的問題是,當我使用的東西有用戶作爲相關的對象,特別是在我有更少的控制模板。
在模板:
{{ request.user.get_profile }}
{# this works and returns the related Person object for the user #}
{% for comment in comments %} {# retrieved using the built-in comments app %}
{{ comment.user.get_profile }}
{# this throws an error because AUTH_PROFILE_MODULE is not defined by design #}
{% endfor %}
短創建它使用我的代理用戶模型取而代之的,是有什麼事我可以做評論系統的包裝版本的?