how to retrive values form RawQuerySet in django?

问题:

my input query is

query = "select * from tab1 left join tab2 on tab2.patient_id =tab1.patient_id ,tab3 left join tab4 on tab4.patient_id =tab3.patient_id"

data = model_name.objects.raw(query)

How do you retrieve values from a RawQuerySet?

回答1:

The result obtained by making raw queries using raw method of Manager generates instances similar to instances generated using get or filter method. To get a field simply do obj_name.attr.
For eg:

class Tab(models.Model):
    field1 = models.BooleanField()
    field2 = models.PositiveIntegerField()

query = "select * from app_name_tab"
objs = Tab.objects.raw(query)
for obj in objs:
    print obj.field1, obj.field2

For more info, refer to https://docs.djangoproject.com/en/dev/topics/db/sql/