title: Django get_or_create and ManytoManyField
body: <p>I'm previously used ForeignKey.</p>
  
  <p>Model</p>
  
  <pre><code>class Phone_request_list(models.Model):
      who = models.IntegerField(null=True)
      whose = models.ForeignKey(User)
  </code></pre>
  
  <p>View</p>
  
  <pre><code>def phone_request(request):
      user_id = request.user.id
      uuid = request.GET.get('uuid')
      profile_id = profiles.objects.get(uuid=uuid).user_id
      p,created = Phone_request_list.objects.get_or_create(who=user_id,whose_id=profile_id)
      p.save()
  </code></pre>
  
  <p>but now I want to change my model to manytomany field</p>
  
  <pre><code>class Phone_request_list(models.Model):
      who = models.IntegerField(null=True)
      whose = models.ManyToManyField(User) 
  </code></pre>
  
  <p>This time how can I check <code>whose</code> with <code>who</code> in <code>get_or_create</code>. Please help me. </p>