I worked some more on James' hint: articles[0].num_publications()
And I followed some tutorial exercises on making Template filters. After
seeing DJ-Tom's hint.
And this is as far as I got from trying things...
I'm trying to send two lists to my template so I can do some parallel
iteration in my forloop.
But then I realized that *type(articles)* is a Queryset and not a list so I
can't use zip() like in the examples I'm reading.
So how can I integrate my list
*publicists_coverage* = [] # List 3
into this forloop template code?
{% for row in *articles* %}
#_______________________________________________________________________________
def index(request):
publications = Publication.objects.all()
# sum_publications = Publication.objects.filter(article__pk=1).count()
# List 1
*articles* =
Article.objects.all().annotate(num_publications=Count('publications'))
#>>> type(articles)
#<class 'django.db.models.query.QuerySet'>
# 3
publication_per_article = [] # List 2
for i in range(articles.count()):
x = articles[i].num_publications
publication_per_article.append(x)
# 5
total_publicists = Publication.objects.all().count()
# Calculate things!
*publicists_coverage* = [] # List 3
for row in publication_per_article:
y = float(row)/total_publicists
publicists_coverage.append(y)
ziplist = zip(articles, publicists_coverage)
context = {'publications':publications, 'articles':articles,
'total_publicists':total_publicists, 'ziplist':ziplist}
# context = {'publications':publications,
# 'total_publicists':total_publicists, 'ziplist':ziplist}
return render(request, 'magazine/index.html', context)
#_______________________________________________________________________________
{% if *articles* and ziplist %}
<table border="1">
<tr>
<th>Article id</th>
<th>Article</th>
<th>Publication</th>
<th>Publicists coverage (%)</th>
</tr>
{% for row in *articles* %}
<tr>
<td>{{ row.id }}</td>
<td>{{ row.headline }}</td>
<td>{{ row.num_publications }}</td>
<td>({{ row.num_publications }} / {{ total_publicists }}) = {{
publicists_coverage }}x %</td>
</tr>
{% endfor %}
</table>
{% else %}
<p>No Articles or Ziplist are available.</p>
{% endif %}
On Wednesday, November 20, 2013 10:29:24 PM UTC+1, Pepsodent Cola wrote:
>
> 1.)
> How do I use mathematical calculations on my forloop Article/Publication
> list?
>
> * I have attached a screenshot with the table field that I'm working on
> *"Publicists
> coverage (%)"*.
> * Admin user/pass = joe/joe
> * I have also attached my project files so that you can see things for
> yourselves.
>
>
> 2.)
> Is the solution I'm working with in "Index View page" the correct practice
> to do my mathematical calculations?
>
>
> #_______________________________________________________________________________
>
> def index(request):
> publications = Publication.objects.all()
>
>
> # sum_publications = Publication.objects.filter(article__pk=1).count()
> articles =
> Article.objects.all().annotate(num_publications=Count('publications'))
> * #articles_int = int(articles)*
>
> * sum_publicists = Publication.objects.all().count()*
>
> * #publicists_coverage = articles/sum_publicists*
>
>
> # context = {'publications':publications,
> 'sum_publicists':sum_publicists,
> # 'publicists_coverage':publicists_coverage,
> 'articles':articles}
> context = {'publications':publications,
> 'sum_publicists':sum_publicists,
> 'articles':articles}
> return render(request, 'magazine/index.html', context)
>
> #_______________________________________________________________________________
>
> <article>
> <h1>How many Publications was each Article in?</h1>
>
> {% if articles %}
> <table border="1">
> <tr>
> <th>Article id</th>
> <th>Article</th>
> <th>Publication</th>
> * <th>Publicists coverage (%)</th>*
> </tr>
> {% for row in articles %}
> <tr>
> <td>{{
> row.id<http://www.google.com/url?q=http%3A%2F%2Frow.id&sa=D&sntz=1&usg=AFQjCNGG971NtAwWsaCVNskfLhyoY4rmew>}}</td>
> <td>{{ row.headline }}</td>
> <td>{{ row.num_publications }}</td>
> <td>(*{{ row.num_publications }} / {{ sum_publicists }}*) = x
> %</td>
> </tr>
> {% endfor %}
> </table>
> {% else %}
> <p>No Articles are available.</p>
> {% endif %}
>
> <hr>
> </article>
>
>
> #_______________________________________________________________________________
>
>
> 3.)
> When I try to convert articles object into int it doesn't work. Am I
> going the wrong direction when thinking about solving things like this?
>
>
> Exception Type: TypeError
> Exception Value: *int() argument must be a string or a number, not
> 'QuerySet'*
> Exception Location: /home/linux/Django/ManyToMany/magazine/views.py in
> index, line 17
>
>
> >>> articles =
> Article.objects.all().annotate(num_publications=Count('publications'))
> >>> type(articles)
> <class 'django.db.models.query.QuerySet'>
> >>>
> >>> *articles_int = int(articles)*
> Traceback (most recent call last):
> File "<console>", line 1, in <module>
> TypeError: int() argument must be a string or a number, not 'QuerySet'
> >>>
>
>
>
>
>
>
>
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