Querying many to many fields in django

Question

In the models there is a many to many fields as,

from emp.models import Name

  def info(request):
     name = models.ManyToManyField(Name)

And in emp.models the schema is as

 class Name(models.Model):
      name = models.CharField(max_length=512)


      def __unicode__(self):
          return self.name

Now when i want to query a particular id say for ex:

         info=  info.objects.filter(id=a)
         for i in info:
              logging.debug(i.name) //gives an error 

how should the query be to get the name

Thanks..

Answer 1

info.name is ManyToManyField so if you want all Name objects associated with it you have to use .all() method on it. Only then you'll get list (queryset) of Name objects:

info_list = info.objects.filter(id=a)
for info_object in info_list:
    for name_object in info_object.name.all():
        print name_object.name

Answer 2

Lukasz is right, but just so you know, it doesn't make sense to filter on an id unless you use info.object.filet(id__in=a) and a is a list of some sort. If you filter on a single id, you should be using objects.get(**kwargs) first of all, and it will return that specific Info instance instead of a QuerySet.