The profile already have an id. Just wanted to add to an existing profile in 
the db with generic view.

----- Reply message -----
From: "Andy" <kakulu...@gmail.com>
To: "Django users" <django-users@googlegroups.com>
Subject: Reverse for 'detail' with arguments '('',)' not found. 1 pattern(s) 
tried: ['(?P<pk>[0-9]+)/$']
Date: Wed, Mar 7, 2018 11:08

If you actually are inside the profile create view, the profile probably does 
not have an id yet and thats why the url lookup is failing. The ID will be 
created on first save of the object.

Am Dienstag, 6. März 2018 00:11:53 UTC+1 schrieb anyi.lloyd:Am new to Django, 
please i need help here. Am trying to add a subject into a particular id using 
generic CreatView, i keeping getting errors
Reverse for 'detail' with arguments '('',)' not found. 1 pattern(s) tried: 
['(?P<pk>[0-9]+)/$']

models.py
from django.db import models
from datetime import date
from django.core.urlresolvers import reverse
from django.shortcuts import redirect


class Profile(models.Model):
firstName = models.CharField(max_length=30)
middleName = models.CharField(max_length=30)
lastName = models.CharField(max_length=30)
dob = models.DateField(blank=True, null=True)
stud_id = models.CharField(max_length=5000)
gender = models.CharField(max_length=10)
parentsName =models.CharField(max_length=30)
address = models.CharField(max_length=250)
lga = models.CharField(max_length=250)
Religion = models.CharField(max_length=50)
email = models.EmailField(max_length=70, null=True, blank=True, unique=True)
phone = models.CharField(max_length=11, unique=True)
photo = models.FileField()
Comment = models.CharField(max_length=250)

def get_absolute_url(self):
return reverse('student:detail', kwargs={'pk': self.pk})

def __str__(self):
return self.firstName

class Course(models.Model):
profile = models.ForeignKey(Profile, on_delete=models.CASCADE, null=True)
subject = models.CharField(max_length=20)
score = models.CharField(max_length=20)
grade = models.CharField(max_length=20)

def get_absolute_url(self,):
return reverse('student:detail', kwargs={'pk': self.pk})

views.pyfrom django.views import generic
from django.views.generic import View
from django.views.generic.edit import CreateView, UpdateView, DeleteView
from django.core.urlresolvers import reverse_lazy, reverse
from django.shortcuts import render, redirect
from django.contrib.auth import authenticate, login
from .models import Profile, Course
from .forms import UserForm



#Index view
class IndexView(generic.ListView):
template_name = 'student/index.html'
context_object_name = 'all_profile'

def get_queryset(self):
return Profile.objects.all()

#Detail view
class DetailView(generic.DetailView):
model = Profile
template_name = 'student/detail.html'

#Add student section
class ProfileCreate(generic.CreateView):
model = Profile
fields = ['firstName', 'middleName', 'lastName', 'dob', 'gender', 
'parentsName', 'address',
'lga', 'Religion', 'email', 'phone', 'photo']

#Add Subject section
class CourseCreate(CreateView):
model = Course
fields = ['subject', 'score', 'grade']


def get_form_kwargs(self):
kwargs = super(CourseCreate, self).get_form_kwargs()
kwargs['instance'] = Course(pk=self.kwargs['pk'])
return kwargs
urls.py
urlpatterns = [
#index url
url(r'^$', views.IndexView.as_view(), name='index'),

url(r'^signup/$', views.UserFormView.as_view(), name='signup'),
#details
url(r'^(?P<pk>[0-9]+)/$', views.DetailView.as_view(), name='detail'),
#profile/add
url(r'^profile/add/$', views.ProfileCreate.as_view(), name='profile-add'),
#course/add
url(r'^(?P<pk>[0-9]+)/course_form/$', views.CourseCreate.as_view(), 
name='course_form'),
#profile/pk for update
url(r'^profile/(?P<pk>[0-9]+)/$', views.ProfileUpdate.as_view(), 
name='profile-update'),
#profile/pk for deleting
url(r'^profile/(?P<pk>[0-9]+)/delete/$', views.ProfileDelete.as_view(), 
name='profile-delete'),
]

template{% extends 'student/base.html' %}
{% block title %}{% endblock %}

{% block body %}

<div class="container subject-container">
<div class="row">
<!-- profile photo-->
<div class="col-sm-4 col-md-3">
<div class="panel panel-primary">
<div class="panel-heading">
<h1 class="panel-title">{{profile.lastName}} {{profile.firstName}}</h1>
</div>
<div class="panel-body">
<a href="{% url 'student:detail' profile.id %}">
{% if profile.photo %}
<img src="{{ profile.photo.url }}" class="img-thumbnail" width="250px" 
hieght="100px">
{% else %}
<p class="small">No image to display</p>
{% endif %}
</a>
</div>
</div>

</div>

<!-- Subject Add-->
<ul class="nav nav-pills" style="margin-bottom: 10px;">
<li role="presentation"><a href="{% url 'student:detail' profile.id %}">View 
All</a></li>
<li role="presentation" class="active"><a href="{% url 'student:course_form' 
profile.id %}">Add New Song</a></li>
</ul>
<div class="col-sm-12 col-md-7">
<div class="panel panel-success">
<div class="panel-heading">
<h1 class="panel-title">Add Subject</h1>
</div>
<div class="panel-body">
<h3>Add Subject</h3>
{% if error_message %}
<p><strong>{{ error_message }}</strong></p>
{% endif %}
<form class="form-horizontal" role="form" action="" method="post" 
enctype="multipart/form-data">
{% csrf_token %}
<input type="hidden" name="profile" value="{{ profile }}">
{% include 'student/form-profile-temp.html' %}
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<button type="submit" class="btn btn-success">Submit</button>
</div>
</div>
</form>

</div>
</div>

</div>

</div>
</div>
{% endblock %}






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