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我有一個使用多個數據庫的應用程序。一旦模型實例對象在內存中,我如何確定它來自哪個數據庫?具體而言,我想知道這在模型類的方法中使用。獲取數據庫django模型對象被查詢從
例子:
class book(Models.model):
newdate = models.DateField(default=date.today())
type = models.CharField(
max_length=30,
choices=BOOK_TYPE,
default = 'novel',
)
def get_current_student(self):
if not hasattr(self,'_current_student'):
try:
self._current_student = clickerlog.objects.using(SELF.ORIGIN_DATABASE).get(book=self.pk,end__isnull = True).student
except:
self._current_student = none
return self._current_student
class booklog(Models.model):
start = models.DateTimeField(
default=datetime.now(),
verbose_name = 'start time'
)
end = models.DateTimeField(null=True,blank=True,)
book = models.ForeignKey(book)
student = models.ForeignKey(student,
limit_choices_to = {'isactive':True})
檢查http://stackoverflow.com/questions/9929629/how-to-get-the-database -d-model-instance-was-saved-in-in-django – okm
[django模型是否知道它從哪個數據庫加載以及如何訪問此信息?](http:// stackoverflow。 COM /問題/ 4146781 /不-A-Django的模型,知道,從-該數據庫-IT-被加載和知識燦這-INFO) – Louis