Django的查询集与多个M2M领域

Question

我有这些模型：

class Doctor(models.Model): 
    coopsort = ManyToManyField('Cooperation', related_name='coopsort') 
    name = models.CharField(...) 

class Cooperation(models.Model): 
    doctor = models.ManyToManyField(Doctor, blank=True, verbose_name=u"Doc") 

我如何查询使用coopsort M2M领域的医生给出的所有项目合作？

Cooperation.objects.filter... <pls advise here> 

Answer 1

比我预想的要容易得多。这工作对我来说：

doC# Doctor instance 
SelectedCooperations = doc.coopsort.all() 

Answer 2

在两种模型中都不需要定义ManyToManyField。如果你需要在Doctor模式：

class Doctor(models.Model): 
    coopsort = ManyToManyField('Cooperation', related_name='coopsort') 
    name = models.CharField(...) 

class Cooperation(models.Model): 
    cooperation_name = ... 

那么你可以像这样过滤cooperations：由医生名字

由医生ID

cooperations = Cooperation.objects.filter(doctor__id=1) 

cooperations = Cooperation.objects.filter(doctor__name='John') 

Answer 3

doC# Doctor instance 
queryset1 = doc.coopsort.all() 
queryset2 = Cooperation.objects.filter(doctor=doc).all() 
queryset = queryset1 | queryset2 

related_name无法在m2m中工作