PS
Size: a a a
PS
АК
V
ModelFirst():
group = FK(Group)
state = Integer
ModelSecond():
group = FK(Group)
state = Integer
ModelThird():
group = FK(Group)
state = Integer
group = Group.objects.filter(modelsecond__state=1, modelfirst__state=1, modelthird__state=1)
GS
DT
HV
GS
HV
DT
ModelFirst():
group = FK(Group)
state = Integer
ModelSecond():
group = FK(Group)
state = Integer
ModelThird():
group = FK(Group)
state = Integer
group = Group.objects.filter(modelsecond__state=1, modelfirst__state=1, modelthird__state=1)
V
DT
DT
GS
DT
V
state
?GS
DT
state
?D