I'm new to Django, but I'm building a website where people can make statements regarding certain debatable topics. Right now I've just manually added a few statements for each debate and I'd like the users to have the ability to "vote" on a statement.

Here's the code I have now:

Code from models.py

class Debate(models.Model): title = models.CharField(max_length=50) description = models.CharField(max_length=100) pub_date = models.DateTimeField('Date Published') url_slug = models.SlugField(editable=False) def __unicode__(self): return self.title
class Statement(models.Model): statement = models.CharField(max_length=200) debate = models.ForeignKey(Debate) votes = models.IntegerField(default=0) user = models.ForeignKey(User) def __unicode__(self): return self.statement

Code from views.py

def debate_page(request, url_slug): if request.method == 'POST': for statement in statements: statement.votes = statement.votes+1 debate = Debate.objects.get(url_slug=url_slug) template = get_template('debate_page.html') statements = Statement.objects.filter(debate=debate) variables = Context ({ 'debate_title': debate.title, 'debate_description': debate.description, 'statements': statements, }) output = template.render(variables) return HttpResponse(output)

Code from template

{% extends "base.html" %}
{% block title %}{{ debate_title }}{% endblock %}
{% block head %}{{ debate_title }}{% endblock %}
{% block description %}{{ debate_description }}{% endblock %}
{% block content %} {% for statement in statements %} <li>{{ statement }} - {{ statement.votes }} <input type="checkbox" name="statement" value="{{ statement.id }}" /></li><br /> {% endfor %} <input type="submit" value="Submit" />
{% endblock %}

So what I'd like is for a visitor to check a box next to the statement that they agree with and then click the submit button. Doing that would increase the votes attribute for the statement by 1. I just can't figure out how to get user input and make a change to the database.

Thanks!

2

2 Answers

kyiphyu's code can be further simplified using F expressions:

from django.db.models import F
Statement.objects.filter(id__in=statements).update(vote=F('vote') + 1)

1

You can get the user input with

statements = request.POST.getlist('statement')

From that list, you can increase the vote count and update database like

for st in statements: statement = Statement.objects.get(id=st) statement.vote += 1 statement.save()

Hope this helps you.

6

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