How to fix the field error issue in django? - postgresql

Question

I try to navigate from list page to detail page, when i tried with the below code. I got error stating that field error. For that I've tried with adding a empty Slug field in models, it shows an page not found error.
#urls.py
from django.urls import path
from .views import (TaskListView,TaskDetailView)
app_name = 'Tasks'
urlpatterns = [
path('', TaskListView.as_view(), name='list'),
path('<slug:slug>/', TaskDetailView.as_view(), name='detail'),
]
#views.py
from django.shortcuts import render
from django.http import HttpResponse
# Create your views here.
from django.views.generic import ListView, DetailView, View
from .models import Taskmanager
def home(request):
return render(request, 'home.html')
class TaskListView(ListView):
template_name = 'Tasks.html'
model = Taskmanager
context_object_name = 'data'
class TaskDetailView(DetailView):
template_name = 'detail.html'
model = Taskmanager
context_object_name = 'data'
#models.py
from django.db import models
from django.urls import reverse
# Create your models here.
week_number = (("week01", "week01"),
("week02", "week02"),
("week03", "week03"),
("week04", "week04"),
("week05", "week05"),
("week06", "week06"),
("week07", "week07"),
("week08", "week08"),
("week09", "week09"),
("week10", "week10"),
("week11", "week11"),
("week12", "week12"),
("week13", "week13"),
("week14", "week14"),
("week15", "week15"),
("week16", "week16"),
("week17", "week17"),
("week18", "week18"),
("week19", "week19"),
("week20", "week20"),
("week21", "week21"),
("week22", "week22"),
("week23", "week23"),
("week24", "week24"),
("week25", "week25"),
("week26", "week26"),
("week27", "week27"),
("week28", "week28"),
("week29", "week29"),
("week30", "week30"),
("week31", "week31"),
("week32", "week32"),
("week33", "week33"),
("week34", "week34"),
("week35", "week35"),
("week36", "week36"),
("week37", "week37"),
("week38", "week38"),
("week39", "week39"),
("week40", "week40"),
("week41", "week41"),
("week42", "week42"),
("week43", "week43"),
("week44", "week44"),
("week45", "week45"),
("week46", "week46"),
("week47", "week47"),
("week48", "week48"),
("week49", "week49"),
("week50", "week50"),
("week51", "week51"),
("week52", "week52"),
("week53", "week53"),
)
class Taskmanager(models.Model):
CurrentSprint = models.CharField(max_length=10, default="week01",
choices=week_number)
todaydate = models.DateField()
taskname = models.SlugField(max_length=200)
testrun = models.URLField(max_length=300)
comments = models.CharField(max_length=300)
assignedto = models.EmailField(max_length=70)
def __str__(self):
return self.taskname
def get_absolute_url(self):
return reverse('Tasks:detail', kwargs={'slug': self.taskname})
#Tasks.html
<a href="{% url 'Tasks:detail' slug='detail'%}"> {{Taskmanager.todaydate}}
</a>
I need an output when I click the link, it needs to navigate to the details page where the details of the task needs to be displayed.

Answer 1

try adding this
#views.py
class TaskDetailView(DetailView):
...
def get_object(self):
instance = get_object_or_404(Taskmanager, slug=self.kwargs['slug'])
return instance
#models.py
django.db.models.signals import pre_save
class Taskmanager(models.Model):
...
taskname = models.CharField(max_length=200)
slug = models.SlugField(max_length=100)
...
def pre_save_Taskmanager_receiver(instance, *args, **kwargs):
if not instance.slug:
instance.slug = instance.taskname
pre_save.connect(pre_save_Taskmanager_receiver, sender= Taskmanager)
# task.html
{{ data.todaydate }}