[英]Django call custom manager method in CreateView and UpdateView
[英]Django ORM call manager method from another manager?
关于如何从Manager.py中访问其他管理器方法的任何提示?
不管我做什么,我似乎都无法访问其他经理的方法。 Python抱怨它没有定义...
如果我在manager.py中导入模型,会引起问题吗? 通函包括什么?
manager.py:
# Returns the whole family who are active
def get_active_dependents_including_guardian( self, consumer, connectedOnly = False ):
logger.debug('get_active_dependents_including_guardian')
results = self.model.objects.filter( guardian = consumer,
is_active = True ).order_by('dob')
if connectedOnly:
from myir import models
#OPTIMIZE: this can be optimized if I query for all patient ids for each dependent in one trip. But I don't even know how to do this yet cause I'm a noob.
results = [d for d in results if models.DependentPatientID.objects.get_patient_ids(d)[0].patient_id_integer == 0] **#HERE IS PROBLEM**
return results
# some stuff omitted...
# this is the manager of models.DependentPatientId
class DependentPatientIDManager( models.Manager ):
def get_patient_ids(self, dependent ):
dpid = self.model.objects.get( dependent = dependent.id )
return dpid
您需要更改:
from myir import models
至
from myir.models import DependentPatientID
原因是,您可能已经from django.db import models
完成操作from django.db import models
并且名称冲突。
现在,
class DependentPatientIDManager( models.Manager ):
def get_patient_ids(self, dependent ):
dpid = self.model.objects.get( dependent = dependent.id )
return dpid
返回一个对象,而不是一个查询集。 因此, DependentPatientID.objects.get_patient_ids(d)[0]
将失败。
所以试试这个
if connectedOnly:
from myir.models import DependentPatientID
patient_id_integer = 0
dep_patient_id = DependentPatientID.objects.get_patient_ids(d)
if dep_patient_id:
patient_id_integer = dep_patient_id.patient_id_integer
results = [d for d in results if patient_id_integer == 0]
#Or just
if not patient_id_integer:
results = []
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