how to display many to many field properly in django - django

Question

This code saves the data and displays the data as i wanted.but while displaying courses it displays like this , ]> .It displays with
QuerySet[].i only want the courses name to be displayed.How can i do that
models.py
class Teacher(models.Model):
name = models.CharField(max_length=50)
address = models.CharField(max_length=50)
phone = models.CharField(max_length=15)
email = models.EmailField()
image = models.ImageField(upload_to='Teachers',blank=True)
courses = models.ManyToManyField(Course)
views.py
def viewteacher(request):
teachers = Teacher.objects.all().order_by('-joined_date')
year1 = datetime.datetime.today().year
return render(request,'students/view_teacher.html',{'teachers':teachers,'year_list':range(2016,year1+1)})
template
{% for teacher in teachers %}
<tr>
<td>{{teacher.name}}</div></td>
<td>{{teacher.courses.all}}</td>
<td>{{teacher.address}}</td>
<td>{{teacher.phone}}</td>
<td>Profile</td>
<td>Edit</td>
<td>Delete</td>
</tr>
{% endfor %}
</tbody>

Answer 1

A QuerySet is rendered like <QuerySet [ ... ]>, so you can iterate over the queryset, and render it properly, like:
{% for teacher in teachers %}
<tr>
<td>{{teacher.name}}</div></td>
<td>{% for course in teacher.courses %} {{course.name}} {% endfor %}</td>
<td>{{teacher.address}}</td>
<td>{{teacher.phone}}</td>
<td>Profile</td>
<td>Edit</td>
<td>Delete</td>
</tr>
{% endfor %}
Obtain the list of courses for every individual teacher is however not very efficient. You can use .prefetch_related to speed up the process. It will then perform a limited number of queries to fetch all the courses, and link these properly to the correct teacher(s):
def viewteacher(request):
teachers = Teacher.objects.prefetch_related('courses').order_by('-joined_date')
year1 = datetime.datetime.today().year
return render(
request,
'students/view_teacher.html',
{'teachers':teachers,'year_list':range(2016,year1+1)}
)