Django Query For most liked - django

Question

I'm been trying to figure out how could I query forthe most liked whiteboard for a particular category
At the moment i'm been querying for all the whiteboards objects for a particular category.
One of my solutions was to query by the boards by the counts of liked but I just couldn't think of a way to query for it
An example at the moment I can retrieve all the whiteboard objects for a particular category , Now how could I retrieve the most liked whiteboard for a particular category.
Can someone help me create function that would query the most liked board of the category so I can understand logically how I can create my own later .Thank you
class WhiteBoard(models.Model):
ENGLISH = 'ENGLISH'
MATH = 'MATH'
SCIENCE = 'SCIENCE'
BIOLOGY = 'BIOLOGY'
CATEGORY = (
(ENGLISH , 'English'),
(MATH, 'Math'),
(SCIENCE, 'Science'),
(BIOLOGY, 'Biology'),
)
Category =models.CharField(max_length=30,choices=CATEGORY)
user = models.ForeignKey(User)
name = models.CharField(max_length=100)
picture = models.OneToOneField('Picture',related_name='picture',blank=True,null=True)
def __unicode__(self):
return self.name
class LikeBoard(models.Model):
user = models.ForeignKey(User)
Whiteboard = models.ForeignKey(WhiteBoard)
created = models.DateTimeField(auto_now_add=True)
My views.py
def WhiteBoardFinder(request):
form = WhiteBoardFinderForm(request.POST)
fo = WhiteBoardFinderForm()
if form.is_valid():
Category = form.cleaned_data['Category']
Whiteboard = WhiteBoard.objects.filter(Category=Category)
return render(request,"boardfinder.html",{"board":board,"fo":fo})
return render(request,"boardfinder.html",{"fo":fo})
boardfinder.html
<form method="POST" enctype="multipart/form-data">
{% csrf_token %}
{{ fo.as_p }}
<input type = "submit" value= "Find Board" />
</form>
{% if board %}
<ul>
{% for b in board %}
<li><a href ="{% url world:Boat b.id %}">{{ b.name }}</li>
{% if b.picture %}
<br><img src="{{ b.picture.image.url }}">
{% endif %}
{% endfor %}
</ul>
{% endif %}
My forms.py
class BoardFinderForm(forms.ModelForm):
class Meta:
model = WhiteBoard
fields = ('Category',)

Answer 1

models.py
class WhiteBoard(models.Model):
ENGLISH = 'ENGLISH'
MATH = 'MATH'
SCIENCE = 'SCIENCE'
BIOLOGY = 'BIOLOGY'
CATEGORY = (
(ENGLISH , 'English'),
(MATH, 'Math'),
(SCIENCE, 'Science'),
(BIOLOGY, 'Biology'),
)
Category =models.CharField(max_length=30,choices=CATEGORY)
user = models.ForeignKey(User)
name = models.CharField(max_length=100)
picture = models.OneToOneField('Picture',related_name='picture',blank=True,null=True)
def __unicode__(self):
return self.name
#property
def count_likes(self):
return LikeBoard.objects.filter(whiteboard=self).count()
class LikeBoard(models.Model):
user = models.ForeignKey(User)
whiteboard = models.ForeignKey(WhiteBoard) //modified because of conflict
created = models.DateTimeField(auto_now_add=True)
views.py
def WhiteBoardFinder(request):
form = WhiteBoardFinderForm(request.POST)
fo = WhiteBoardFinderForm()
if form.is_valid():
Category = form.cleaned_data['Category']
whiteboard = WhiteBoard.objects.filter(Category=Category)
categories = WhiteBoard.objects.values_list('Category', flat=True).distinct()
whites = sorted(whiteboard, key=lambda x: x.count_likes, reverse=True)
return render(request,"boardfinder.html",{
"board":board,"fo":fo, "categories": categories, "whites": whites})
return render(request,"boardfinder.html",{"fo":fo})
templates
{% for category in categories %}
{{ category }}<br/>
{% for white in whites %}
{% if white.Category == category %}
{{ white }} - {{ white.count_likes }},
{% endif %}
{% endfor %}<br/>
{% endfor %}