Book.objects.filter(Q(pk=1)|(Q(user_id=1)& Q(room_id=1)))

q=Q()

q.connector="OR"

q.children.append(("pk",1))

q.children.append(("user_id",1))

q.children.append(("room_id",1))

Book.objects.filter(q)    

q1=Q()

q1.connector="AND"

q1.children.append(("pk",))

q1.children.append(("user_id",))

q2=Q()

q2.connector="AND"

q2.children.append(("pk",))

q2.children.append(("user_id",))

q=Q()

q.add(q1, 'OR')

q.add(q2, 'OR')

# 相当于q1 or q2