Question on returning methods in a class

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Question on returning methods in a class - menator01 - Feb-03-2020

As the title states, I'm trying to figure out how to access the return on a query in django.

models.py

class Board(models.Model):
    category = models.CharField(max_length=20, unique=True)
    description = models.CharField(max_length=100)

    def __str__(self):
        return self.category


class Topic(models.Model):
    subject = models.CharField(max_length=100, unique=True)
    board = models.ForeignKey(Board, on_delete=models.CASCADE)

views.py

class HomeView(ListView):
    model = Board
    context_object_name = 'categories'
    template_name = 'boards/forum.html'
    queryset = Board.objects.all()
    titles=queryset

    def get_category_subjects(self):

        for title in self.titles:
            subjects = Topic.objects.filter(board_id=title.id)
        return subjects

for category in categories:
    print(category)
    for title in category.get_category_subjects:
        print(title)

Any help would be great. Thanks.

RE: Question on returning methods in a class - menator01 - Feb-03-2020

Figured it out. Probably not the best approach but works.

Revised views.py

class HomeView(ListView):
    model = Board
    context_object_name = 'categories'
    template_name = 'boards/forum.html'
    queryset = Board.objects.all()


    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['subjects']=[]
        for titles in self.queryset:
            context['subjects'].append(Topic.objects.filter(board_id=titles.id))
        return context

In the html

{% for category in categories %}
    {{category}}
                    {% for titles in subjects %}
                        {% for title in titles %}
                            {% if title.board_id == category.id %}
                            <a href="#">{{title.subject}}</a><br>
                            {% endif %}
                        {% endfor %}
                    {% endfor %}
{% endfor %}

RE: Question on returning methods in a class - michael1789 - Feb-03-2020

class Board(models.Model):
    category = models.CharField(max_length=20, unique=True)
    description = models.CharField(max_length=100)
 
    def __str__(self):
        return self.category

Using this as example, if you want to return a self.catagory you'll need to define it with self. above.

Then if you want access to it I think this is the way, but instead of using Board use the instance name.

what_you_want = Board._str_()

RE: Question on returning methods in a class - menator01 - Feb-03-2020

The approach I took works, I just don't really like having to do a loop inside a loop inside a loop.