call custom manager in template

Using Django
1

hi
i have template, when i clic under icon dont go to desired view or urls path
please any help i will apreciate it
code below:

template

a href=“test_detail.test_analyse.get_add_to_cart_url” >…

model
class Test(models.Model):
title:models.CharField ( max_length = 35 )

class Test_Analyse(models.Model):
tests = models.ForeignKey ( ‘tests.Test’ , on_delete = models.CASCADE )
analyse = models.ForeignKey(‘Analyse’,on_delete = models.CASCADE)

def __str__(self):
    return self.test.title + ' : ' + self.analyse.code

def get_add_to_cart_url(self):
    return reverse("tests:add-to-cart", kwargs={'tests':self.tests,'analyse':self.analyse})

urls
path(‘int:idtest/int:idanalyse’, views.add_to_cart, name=‘add-to-cart’),

views
def add_to_cart(request, idtests, idanalyse):
print(str(idtests)+’:’+str(idanalyse))

2

Hi!

After the template is rendered, what’s the url of the <a> tag?

If I understand correctly, you could save 1 step and put use the {% url %} template tag in your HTML template.

<a href="{% url 'tests:add-to-cart' idtest=self.tests idanalyse=self.analyse %}">

PD:

  • I suggest you to format your code inside a pair of ``` around your code.
  • Also, please change the topic of this issue to Using Django.
    Django Internals is for things related to the development of Django itself.
3

thanks for your reply and sorry for mistakes
url does not work as you proposed
template

<td>
<a href="test_detail.test_analyse.get_add_to_cart_url"  ><i class="glyphicon glyphicon glyphicon-shopping-cart"></i></a>
</td>

model
class Test(models.Model):
   title:models.CharField ( max_length = 35 )

class Test_Analyse(models.Model):
    tests = models.ForeignKey ( 'tests.Test' , on_delete = models.CASCADE )
    analyse = models.ForeignKey('Analyse',on_delete = models.CASCADE)

   def __str__(self):
       return self.test.title + ' : ' + self.analyse.code

    def get_add_to_cart_url(self):
       return reverse("tests:add-to-cart", kwargs={'tests':self.tests,'analyse':self.analyse})

urls
path('<int:idtest>/<int:idanalyse>', views.add_to_cart, name='add-to-cart'),

views
def add_to_cart(request, idtests, idanalyse):
   print(str(idtests)+':'+str(idanalyse))
4

Ok, so what’s inside href after the page is rendered?

5

get_add_to_cart_url in Test_Analyse reverse to urls : path add-to-cart with two parameters to views

6

hi i have success to solve problem with ‘’’ {% url …
i have error with this code,it gives error from third line (lig_reserv,created) :

def add_to_cart(request, id, id1):
    an_t = get_object_or_404(Test_Analyse, tests=id, analyse=id1)
    
    lig_reserv,created=  Ligne_Reserve.objects.get_or_create(analyse=an_t)
    reserv_qs = Reserve.objects.filter(client=request.user,active=False)
    if reserv_qs.exists():
       reserv = reserv_qs[0]
       if not (reserv.ligne_reserve.filter(analyse=an_t).exists) :
           reserv.ligne_reserve.add(lig_reserv) 
    else:
         reserv_date = timezone.now()
         reserv = Reserve.objects.create(
             client = request.user,date = reserv_date)
         reserv.ligne_reserve.add(lig_reserv)    
         return redirect("tests:tests_details",tests=id)


model 
class Test(models.Model):
  title:.....

class Analyse ( models.Model ):
    code = models.CharField ( max_length = 20 )
    desc = models.TextField ( )
    tests= models.ManyToManyField ( 'tests.Test' , through = 'Test_Analyse' )

class Test_Analyse (models.Model):
    tests= models.ForeignKey ( 'tests.Test' , on_delete = models.CASCADE )
    analyse = models.ForeignKey('Analyse',on_delete = models.CASCADE)

class Reserve ( models.Model ):
   client = models.ForeignKey ( User , on_delete = models.CASCADE , default = 'blank' )
   date = models.DateTimeField ( default = datetime.now )
   active = models.BooleanField(default = False)
   def get_queryset(self , request):
      qs = super ( Reserve , self ).get_queryset ( request )
      return qs.filter ( client = request.user )

   def __str__(self):
         return self.client.username + ' : ' + str( self.date )


class Ligne_Reserve ( models.Model ):
   reservations = models.ForeignKey (Reserve , on_delete = models.CASCADE)
  
   analyse = models.ForeignKey('analyse.Test_Analyse', on_delete = models.CASCADE)
7

Anytime you get an error, it’s important that you post the complete error.
See How do I ask a good question? - Help Center - Stack Overflow for some thoughts.

Since you did mention the line involved, you might want to review the docs of the get_or_create method.

8

ok thanks, i think my message was clear
from errors i learn
thanks for your assistance