Question

I have a class Person which can have several Homes, each one with one or many Phone numbers.

I have defined the classes, but now i am trying to create a view wich list every person, with all its homes and all the phone numbers for each home address… something like:

john smith 123 fake str   305-99-8877   305-99-8876 321 oak road   444-98-7654  peter guy 453 north ave... 

so far i have something like this:

(on my views.py)

def ViewAll(request):   people = Person.objects.all()   render_to_response('viewall.html', {'people': people}) 

(and on my template)

{% for guy in people %}    {{ guy.name }}   {% if person.home_address_set.all %}     {{ home_address }}      {% for ?????? in ???? %}       #print phone numbers in each home     {% endfor %}    {% endif %} {% endfor %} 

any idea of how to write the for I’m missing? of course, if there is another way (a better more elegant or efficient way) of doing what I need, I would love to hear it.

Answer 1

You have what appears to be three nested collections: Person, Home, Phone Number.

Step 1 – How would you write this in a view function?

for p in Person.objects.all():     print 'person', p     for h in p.home_address_set.all():          print ' home', h          for ph in h.phone_set.all():              print '  phone', ph 

Don’t omit this step. If you can’t make it work in a view function, your model is wrong. Take the time to get this part right.

Step 2 – Convert this into template syntax.

{% for p on people %}     {% for h in p.home_address_set.all %}         {% fpr ph in h.phone_set.all %}         {% endfor %}     {% endfor %} {% endfor %}  

The results should be the same as your view function.