#This code is use to match current user interests to SponsoredBook.keywords
and if it matches more than one keyword we increase it's points and finally
we sort this on the basis of points and pass it to the templates.
#For a small amount of data this works fine as will data will grow this is
going to make process slow. This is why i need a different optimal approach
to do this.
#Please reach out to me if you need more information on the same.
#models.py - my model looks something like this
class Intrest(models.Model):
user = models.ForeignKey(User, related_name='intrests',
on_delete=models.CASCADE)
keyword = models.CharField(max_length=100)
created_on = models.DateTimeField(auto_now_add=True)
def __str__(self):
return self.keyword
class Meta:
ordering = ['-created_on']
class SponsoredBook(models.Model):
places = (
('Royal Place', 'Royal Place'),
('Search Result', 'Search Result')
)
def validate_image(fieldfile_obj):
if get_image_dimensions(fieldfile_obj) != (180, 290):
raise ValidationError("Thumnail should be exact 180*290")
user = models.ForeignKey(User, related_name='sponsored_books',
on_delete=models.CASCADE)
def user_directory_path(self, filename):
return 'media/user_{0}/{1}'.format(self.user.id, filename)
title = models.CharField(max_length=20)
bid = models.FloatField()
placed_on = models.CharField(choices=places, max_length=20)
description = models.TextField()
height = models.PositiveIntegerField()
width = models.PositiveIntegerField()
verified = models.BooleanField(default=False)
thumbnail = models.ImageField(upload_to=user_directory_path,
height_field='height', width_field='width', validators=[validate_image])
created_on = models.DateTimeField(auto_now_add=True)
def __str__(self):
return str(self.title)
class Meta:
ordering = ['-bid']
class Keyword(models.Model):
sponsored_book = models.ForeignKey(SponsoredBook, related_name='keywords',
on_delete=models.CASCADE)
title = models.CharField(max_length=50)
def __str__(self):
return self.title
class Meta:
ordering = ['title']
#views.py
class CustomSponsoredBook():
obj = models.SponsoredBook.objects.none()
points = 0
user = get_object_or_404(User, id=3)
intrests = user.intrests.all()
final_sponsored_books = []
count = 0
for intrest in intrests:
print(intrest)
sponsored_books = models.SponsoredBook.objects.filter(verified=True,
keywords__title__iexact=intrest)
print(sponsored_books)
if sponsored_books.exists():
sponsored_books = list(sponsored_books)
for sponsored_book in sponsored_books:
should_continue = False
for custom_sponsored_book in final_sponsored_books:
if custom_sponsored_book.obj == sponsored_book:
custom_sponsored_book.points += 1
should_continue =True
break
if should_continue:
continue
custom_sponsored_book = CustomSponsoredBook()
custom_sponsored_book.obj = sponsored_book
final_sponsored_books.append(custom_sponsored_book)
if len(final_sponsored_books) == 6:
break
final_sponsored_books.sort(key=lambda x: x.points, reverse=True)
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