Django Delete Button Action for ModelFormset - django

Question

I've got a modelformset which is shown in below:
views.py
def manage_authors(request):
AuthorFormSet = modelformset_factory(Author, fields=('name', 'title', 'birth_date'))
if request.method == 'POST':
if "del_btn" in request.POST:
query = Author.objects.get(...).delete()
formset = AuthorFormSet(request.POST, request.FILES)
if formset.is_valid():
formset.save()
formset = AuthorFormSet(queryset=Author.objects.all())
print "yes"
else:
formset = AuthorFormSet(request.POST, request.FILES)
if formset.is_valid():
formset.save()
formset = AuthorFormSet(queryset=Author.objects.all())
else:
formset = AuthorFormSet(queryset=Author.objects.all())
return render(request, "manage_authors.html", {"formset": AuthorFormSet, })
manage_authors.html
<form method="post" action="/manage_authors.html">{% csrf_token %}
{{ formset.management_form }}
{% for form in formset %}
{{ form.id }}
<ul>
{{ form.name }} {{ form.title }} {{ form.birth_date }}
<input type="submit" name="del_btn" value="Delete"/>
</ul>
{% endfor %}
<input type='submit' name="edit_btn" value='Edit / Add'/>
What query I can define so that the Delete button could work?
Now, I got problem with knowing which row must be deleted.
Thanks in advance

Answer 1

First I recommend registering your user model in admin.py:
admin.site.register(Author)
Django will handle the rest.
But if you want to do it with this code do like this:
<form method="post" action="/manage_authors.html">{% csrf_token %}
{{ formset.management_form }}
for form in formset %}
{{ form.id }}
<ul>
{{ form.name }} {{ form.title }} {{ form.birth_date }}
<input type="submit" name="del_btn{{ form.instance.id }}" value="Delete"/>
</ul>
{% endfor %}
<input type='submit' name="edit_btn" value='Edit / Add'/>
So that primary key of object will relate to the delete button name.
Now, in views.py:
import re, urllib
def manage_authors(request):
AuthorFormSet = modelformset_factory(Author, fields=('name', 'title', 'birth_date'))
if request.method == 'POST':
enurl=urllib.urlencode(request.POST) # To convert POST into a string
matchobj=re.search(r'del_btn\d', enurl) # To match for e.g. del_btn1
btnname=matchobj.group() # Contains matched button name
pri_key=btname[-1] # slice the number of btn to identify primarykey
if matchobj:
query = Author.objects.get(pk=pri_key).delete()
formset = AuthorFormSet(request.POST, request.FILES)
if formset.is_valid():
formset.save()
formset = AuthorFormSet(queryset=Author.objects.all())
print "yes"
else:
formset = AuthorFormSet(request.POST, request.FILES)
if formset.is_valid():
formset.save()
formset = AuthorFormSet(queryset=Author.objects.all())
else:
formset = AuthorFormSet(queryset=Author.objects.all())
return render(request, "manage_authors.html", {"formset": AuthorFormSet, })