Django dropbox dynamic error - django

Question

I have a page that display all the objects acorrding to the catergory the students pick.
I implemented a pagination on the site to split the objects at different pages.
The problem occurs when the students pick a catergory from the dropbox and tries to flick through the pagination for new and old entries.
The reason this happens because everytime the user picks a catergory from the dropbox , the dropbox get reset once it retrieve the objects. So when users try to flick through objects using the pagination . The pagination doesn't know what data to retrieve because the dropbox catergory get reset and redirec the users to a blank page.
A solution to this is to program the dropbox to remain static for the choices the users make so when the users flicks through the data split by the pagination , the pagination know can retrieve objects according to the dropbox.
I can't figure out how to make this dropbox remain static for the choices the users make.
my views.py
def BoardFinder(request):
form = BoardFinderForm(request.POST)
fo = BoardFinderForm()
if form.is_valid():
Category = form.cleaned_data['Category']
posts = Board.objects.filter(Category=Category)
paginator = Paginator(posts, 1)
try: page = int(request.GET.get("page", '1'))
except ValueError: page = 1
try:
posts = paginator.page(page)
except (InvalidPage, EmptyPage):
posts = paginator.page(paginator.num_pages)
return render(request,"boardfinder.html",{"posts":posts,"fo":fo})
return render(request,"boardfinder.html",{"fo":fo})
My models.py
class Board(models.Model):
MATH = 'MATH'
ENGLISH = 'ENGLISH'
SCIENCE = 'SCIENCE'
LANGUAGE = 'LANGUAGE'
CATEGORY = (
(MATH, 'Math'),
(ENGLISH, 'English'),
(SCIENCE, 'Science'),
(LANGUAGE, 'Language'),
)
Category =models.CharField(max_length=30,choices=CATEGORY)
user = models.ForeignKey(User)
name = models.CharField(max_length=100)
created = models.DateTimeField(auto_now_add=True)
picture = models.OneToOneField('Picture',related_name='picture',blank=True,null=True)
def __unicode__(self):
return self.name
class BoardFinderForm(forms.ModelForm):
class Meta:
model = Board
fields = ('Category',)
Important parts of my boardfinder.html
<form method="POST" enctype="multipart/form-data">
{% csrf_token %}
{{ fo.as_p }}
<input type = "submit" value= "Find WhiteBoard" />
</form>
{% for post in posts.object_list %}
<div class="title">{{ post.name }}</div>
{% endfor %}

Answer 1

<form method="GET">
<p><select name="category">
<option value=""
{% if not request.session.category %}selected{% endif %}>
(All subjects)
</option>
<option value="ENGLISH"
{% if request.session.category == "ENGLISH" %}selected{% endif %}>
English
</option>
<option value="LANGUAGE"
{% if request.session.category == "LANGUAGE" %}selected{% endif %}>
Language
</option>
<option value="MATH"
{% if request.session.category == "MATH" %}selected{% endif %}>
Math
</option>
<option value="SCIENCE"
{% if request.session.category == "SCIENCE" %}selected{% endif %}>
Science
</option>
</select></p>
<input type = "submit" value= "Find WhiteBoard" />
</form>
def BoardFinder(request):
category = request.GET.get('category')
if category:
request.session['category'] = category
posts = Board.objects.filter(Category=category)
paginator = Paginator(posts, 1)
try: page = int(request.GET.get("page", '1'))
except ValueError: page = 1
try:
posts = paginator.page(page)
except (InvalidPage, EmptyPage):
posts = paginator.page(paginator.num_pages)
return render(request,"boardfinder.html",{"posts":posts,"fo":fo})
return render(request,"boardfinder.html",{"fo":fo})