Develop Reference

Setup UpdateView in Django with a form that has the __init__ method configured

When I use UpdateView in Django with a form that has the __init__ method configured to customize the ModelMultipleChoiceField querysets do not load the initial values of the instance?
Some context first, I find myself making an application that manages documents associated to subportals, for that each subportal has associated Service Groups and Dependencies.
I need that when a document is loaded, it can be categorized by Service Groups and Dependencies that are only associated to the subportal. I achieved this by using the __init__ method in the forms.
The problem is that when I need to update the document data, the initial values of the model do not appear.
I show the codes
Models.py
class ServiceGroup(models.Model):
subportal = models.ForeignKey(Subportal, null=True, blank=True, on_delete=models.CASCADE)
title = models.CharField(max_length=150, null=False, blank=False)
description = models.TextField()
created_at = models.DateTimeField(auto_now_add=True)
def __str__(self):
return self.title
class Dependence(models.Model):
subportal = models.ForeignKey(Subportal, null=True, blank=True, on_delete=models.CASCADE)
title = models.CharField(max_length=150, null=False, blank=False)
created_at = models.DateTimeField(auto_now_add=True)
def __str__(self):
return self.title
class SubportalDocument(models.Model):
def get_upload_to(instance, filename):
return '{}/documents/{}'.format(instance.subportal.title, filename)
subportal = models.ForeignKey(Subportal, null=True, blank=True, on_delete=models.CASCADE)
showcategory = models.OneToOneField(ShowCategory, null=True, blank=True, on_delete=models.CASCADE)
title = models.CharField(max_length=150, null=False, blank=False)
file = models.FileField(upload_to=get_upload_to, null=False, blank=False)
review_date = models.DateField(null=False, blank=True)
review_nro = models.IntegerField(null=False, blank=True)
created_at = models.DateTimeField(auto_now_add=True)
dependences = models.ManyToManyField(Dependence, related_name='dependencesdoc', blank=True)
servicegroups = models.ManyToManyField(ServiceGroup, related_name='servicegroupsdoc', blank=True)
def __str__(self):
return self.title
Forms.py
class SubportalDocumentForm(forms.ModelForm):
class Meta:
model = SubportalDocument
exclude = ['subportal', 'created_at', 'status']
labels = {
'showcategory':'Categoría de Despliegue:',
'title':'Nombre del Documento:',
'file':'Cargar el archivo:',
'review_nro':'Número de Revisión:',
'review_date':'Fecha de Revisión:',
}
widgets = {
'showcategory':forms.Select(attrs={'class':'form-select'}),
'title':forms.TextInput(attrs={'class':'form-control'}),
'file':forms.FileInput(attrs={'class':'form-control'}),
'review_nro': forms.NumberInput(attrs={'class':'form-control'}),
'review_date': forms.DateInput(format=('%d/%m/%Y'),
attrs={'class':'form-control',
'type':'date'}),
}
servicegroups = forms.ModelMultipleChoiceField(
label='Grupos de Servicios:',
queryset=None,
widget=forms.CheckboxSelectMultiple,
)
dependences = forms.ModelMultipleChoiceField(
label='Dependencias:',
queryset=None,
widget=forms.CheckboxSelectMultiple,
)
def __init__(self, *args, **kwargs):
self.subportal = kwargs.pop('subportal')
super(SubportalDocumentForm, self).__init__(*args, **kwargs)
self.fields['servicegroups'].queryset = ServiceGroup.objects.filter(
subportal=self.subportal)
self.fields['dependences'].queryset = Dependence.objects.filter(
subportal=self.subportal)
self.fields['showcategory'].queryset = ShowCategory.objects.filter(
subportal=self.subportal)
self.fields['servicegroups'].widget.attrs.update({
'class': 'form-check-input',
})
self.fields['dependences'].widget.attrs.update({
'class': 'form-check-input',
})
Views.py
class SubportalDocumentUpdateView(UpdateView):
model = SubportalDocument
form_class = SubportalDocumentForm
template_name = 'portal_manager/create_document.html'
def get_form_kwargs(self, *args, **kwargs):
subportal_id = self.get_object().subportal_id
subportal = get_object_or_404(Subportal, id=subportal_id)
kwargs = {
"subportal": subportal,
}
return kwargs
def dispatch(self, request, *args, **kwargs):
id = self.get_object().subportal_id
self.get_form().fields['servicegroups'].queryset = ServiceGroup.objects.filter(subportal_id=id)
self.get_form().fields['dependences'].queryset = Dependence.objects.filter(subportal_id=id)
return super(SubportalDocumentUpdateView, self).dispatch(request, *args, **kwargs)
def get_success_url(self):
id = self.get_object().subportal_id
return reverse_lazy('portal_manager:admin_subportal', kwargs={'id': id})
Urls.py
path('modificar-documento/<int:pk>', views.SubportalDocumentUpdateView.as_view(), name='update_document'),
The result I get is this.
image of the form without the initial values:
Now, if I don't use the __init__ method in the forms to filter the Service Groups and Dependencies by subportal, I get the initial values.
forms.py not init
class SubportalDocumentForm(forms.ModelForm):
class Meta:
model = SubportalDocument
exclude = ['subportal', 'created_at', 'status']
labels = {
'showcategory':'Categoría de Despliegue:',
'title':'Nombre del Documento:',
'file':'Cargar el archivo:',
'review_nro':'Número de Revisión:',
'review_date':'Fecha de Revisión:',
}
widgets = {
'showcategory':forms.Select(attrs={'class':'form-select'}),
'title':forms.TextInput(attrs={'class':'form-control'}),
'file':forms.FileInput(attrs={'class':'form-control'}),
'review_nro': forms.NumberInput(attrs={'class':'form-control'}),
'review_date': forms.DateInput(format=('%d/%m/%Y'),
attrs={'class':'form-control',
'type':'date'}),
}
servicegroups = forms.ModelMultipleChoiceField(
label='Grupos de Servicios:',
queryset=ServiceGroup.objects.all(),
widget=forms.CheckboxSelectMultiple,
)
dependences = forms.ModelMultipleChoiceField(
label='Dependencias:',
queryset=Dependence.objects.all(),
widget=forms.CheckboxSelectMultiple,
)
Ajust Views.py
class SubportalDocumentUpdateView(UpdateView):
model = SubportalDocument
form_class = SubportalDocumentForm
template_name = 'portal_manager/create_document.html'
def dispatch(self, request, *args, **kwargs):
id = self.get_object().subportal_id
self.get_form().fields['servicegroups'].queryset = ServiceGroup.objects.filter(subportal_id=id)
self.get_form().fields['dependences'].queryset = Dependence.objects.filter(subportal_id=id)
return super(SubportalDocumentUpdateView, self).dispatch(request, *args, **kwargs)
def get_success_url(self):
id = self.get_object().subportal_id
return reverse_lazy('portal_manager:admin_subportal', kwargs={'id': id})
Image with the expected result but filtering the Service Groups and Dependencies:
If someone could help me or give me a clue about what is happening, I would appreciate it very much, I have been investigating for a long time and I can't get an answer.

TypeError returning Model entry

I'm creating an ebay style website that auctions off items. I have a form that takes in the values for the listing required by the model. The form renders well but when I submit the form I get the error:
<class 'TypeError'> views.py 80 ("l = Listing(title=title, description=description, url=url, user=user_id, category=category)")
forms.py
class NewListingForm(forms.Form):
title = forms.CharField(max_length=200)
description = forms.CharField(max_length=500)
url = forms.URLField()
bid = forms.DecimalField(decimal_places=2, max_digits=10)
category = forms.ModelChoiceField(queryset=Category.objects.all())
views.py
** added around line that's throwing the error
def newListing(request):
try:
if request.method == "POST":
newListingForm = NewListingForm(request.POST)
if newListingForm.is_valid():
title = newListingForm.cleaned_data['title']
description = newListingForm.cleaned_data['description']
url = newListingForm.cleaned_data['url']
bid = newListingForm.cleaned_data['bid']
category = newListingForm.cleaned_data['category']
current_user = request.user
user_id = current_user.id
**l = Listing(title=title, description=description, url=url, user=user_id, category=category)**
l.save()
b = Bid(price=bid, bid_count=0)
b.listing.add(l)
b.save()
return HttpResponseRedirect(reverse("index"))
else:
newListingForm = NewListingForm()
return render(request, "auctions/newListing.html", {
'form': newListingForm
})
except Exception as exc:
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
print(exc_type, fname, exc_tb.tb_lineno)
newListingForm = NewListingForm()
return render(request, 'auctions/newListing.html', {
'form': newListingForm
})
models.py
class Listing(models.Model):
title = models.CharField(max_length=200)
description = models.CharField(max_length=500)
url = models.URLField()
user = models.ForeignKey('User', on_delete=models.CASCADE, name='author')
category = models.ForeignKey('Category', on_delete=models.CASCADE, name='category', default="")
def __str__(self):
return f'{self.id}: {self.title}'
class Bid(models.Model):
price = models.DecimalField(decimal_places=2, max_digits=10)
bid_count = models.IntegerField()
listing = models.ForeignKey('Listing', on_delete=models.CASCADE, name='listing', default="")
def __str__(self):
return f'{self.slug} ({self.price})'

User is a keyword, so I was getting an error from that.

Django - expected type pk, received str [Many to many]

I have a webapp where we can create communities with django as a backend, but when i try to send a POST to create a community, I get:
community_configuration: ["Incorrect type. Expected pk value, received str."]
My POST:
{
title: knkn kn .k jbjnmn,
logo: [object File],
is_active: true,
description: test,
welcome_message: Welcome message,
org_id: 114,
community_configuration: About us,Community news,FAQs,Supporters,Resources,
}
Here are my serializers:
class MicroConfigurationSerializer(serializers.ModelSerializer):
class Meta:
model = MicroConfiguration
fields = [
'name',
]
def to_representation(self, instance):
return instance.name
class CommunityConfigurationSerializer(serializers.ModelSerializer):
micro_configurations = MicroConfigurationSerializer(many=True, read_only=True)
class Meta:
model = CommunityConfiguration
fields = '__all__'
class CommunitySerializer(serializers.ModelSerializer):
logo = serializers.SerializerMethodField()
organisation = serializers.SerializerMethodField()
community_configuration = CommunityConfigurationSerializer()
class Meta:
model = Community
fields = (
...
etcetc
...
)
Heres my model:
class MicroConfiguration(core_models.BaseModel):
name = models.CharField(max_length=32, unique=True)
permissions = models.ManyToManyField(Permission)
def __str__(self):
return self.name
class CommunityConfiguration(core_models.BaseModel):
name = models.CharField(max_length=32)
micro_configurations = models.ManyToManyField(MicroConfiguration)
permission_group = models.ForeignKey(
Group,
on_delete=models.SET_NULL,
null=True
)
def __str__(self):
return self.name
class Community(core_models.BaseModel):
accounts = models.ManyToManyField(
settings.AUTH_USER_MODEL,
through='associates.AccountCommunity',
through_fields=('community', 'account')
)
goals = models.ManyToManyField(Goal, through='associates.CommunityGoal')
type = models.ManyToManyField(CommunityType, through='CommunityAttribute')
communities = models.ManyToManyField(
'self',
through='associates.CommunityCommunity',
symmetrical=False,
)
crossposts = models.ManyToManyField(
Action,
through='activities.CommunityCrosspost',
through_fields=('community', 'action'),
related_name='communities',
)
title = models.CharField(max_length=64)
logo = models.ImageField(null=True, blank=True)
intro_media = models.ForeignKey(
'associates.MediaStore',
null=True,
on_delete=models.SET_NULL
)
website_url = models.CharField(max_length=256, blank=True)
is_invite_only = models.BooleanField(default=False)
description = models.TextField(blank=True)
intro_message = models.TextField(blank=True)
welcome_message = models.TextField(blank=True)
signup_autojoin = models.BooleanField(default=False)
community_configuration = models.ForeignKey(
CommunityConfiguration,
default=1,
null=True,
on_delete=models.SET_NULL,
help_text='Do not edit directly, create a new custom config instead, \
as it is reference by difference community.',
)
objects = models.Manager()
associates = AssociationManager()
#property
def url(self):
return reverse(
'communities:detail',
kwargs={
'id': self.id,
}
)
class Meta:
verbose_name = 'Community'
verbose_name_plural = 'Communities'
def __str__(self):
return self.title
Here's my views:
class CommunityCreateAPIView(CreateAPIView):
serializer_class = CommunityCreateSerializer
def create(self, request, **kwargs):
organisation_id = request.data.get('org_id')
micro_configurations_qd = request.data.copy()
micro_configurations = micro_configurations_qd.pop('community_configuration', False)
if micro_configurations:
micro_configurations = micro_configurations[0].split(',')
user = request.user
data = {}
permitted = AccountOrganisation.objects.filter(
account=user,
organisation_id=organisation_id,
is_active=True,
association__permissions__codename='add_community',
).exists()
if not permitted and not request.user.is_superuser:
data['message'] = 'Action not allowed'
return Response(
data=data,
status=status.HTTP_400_BAD_REQUEST,
)
response = super().create(request, **kwargs)
if response.status_code == 400:
data['message'] = 'Failed to update community'
return Response(
data=data,
status=status.HTTP_400_BAD_REQUEST,
)
community_id = response.data.get('id')
OrganisationCommunity.objects.create(
community_id=community_id,
organisation_id=organisation_id,
)
association = Group.objects.get(name='Community Admin')
AccountCommunity.objects.create(
community_id=community_id,
account=user,
association=association,
)
if micro_configurations:
com_config_qs = CommunityConfiguration.objects.filter(
micro_configurations__name__in=micro_configurations
).annotate(
num_micro_config=Count('micro_configurations__name')
).filter(
num_micro_config=len(micro_configurations)
)
community_configuration = None
if micro_configurations:
for com_config in com_config_qs:
micro_config_count = com_config.micro_configurations.count()
if micro_config_count == len(micro_configurations):
community_configuration = com_config
break
if community_configuration:
Community.objects.filter(
pk=community_id
).update(
community_configuration=community_configuration
)
elif micro_configurations:
micro_qs = MicroConfiguration.objects.filter(
name__in=micro_configurations
)
community_config = CommunityConfiguration.objects.create(
name='Custom'
)
community_config.micro_configurations.set(micro_qs)
community_config.save()
Community.objects.filter(
pk=community_id
).update(
community_configuration=community_config
)
return response
I've been stuck with this for hours, any help?

Your serializer expects a pk (or id) of the community_configuration instance.
basically you have it set up so that you need to create a community_configuration entry first, then fetch the id of the new created entry and use that id when creating your community.
If you want to have the community_configuration instance to be created while creating the community then an option to do that would be to override the create method in the serializer and extract the community_configuration data then create a new entry for that model and use it, something like this
class CommunitySerializer(serializers.ModelSerializer):
# .. put your serializer code here
def create(self, validated_data):
community_configuration= validated_data.pop('community_configuration')
config_instance, created = CommunityConfiguration.objects.get_or_create(<community_configuration>) # modify this however you need to create the CommunityConfiguration instance
community_instance = community.objects.create(**validated_data, community_configuration=config_instance)
return community_instance
you will need to probably modify the code for it to follow your needs.
I didn't read all of your models, not sure how you are gonna create the nested models from the input value but you get the point.

__init__() got an unexpected keyword argument 'book_category'

Hi? I'm new to web development can you plz help me whats the problem with my file?
I don't know why is this, I have defined my category model properly and imported it. I have also defined book_category. Im stuck
views.py: the error is found here
class AddBookIndexView(View):
def get(self, request):
booksQS = Books.objects.all()
authorsQS = Author.objects.all()
categoryQS = Category.objects.all()
print(authorsQS)
print(categoryQS)
print(booksQS)
return render(request, 'addbook.html')
def post(self, request):
form = BooksForm(request.POST, request.FILES)
if form.is_valid():
book_category = request.POST.get('book_category')
firstname = request.POST.get('Firstname')
lastname = request.POST.get('Lastname')
author = Author.objects.filter(Q(firstname__icontains = firstname) & Q(lastname__icontains = lastname))
if author:
print(author)
else:
form = AuthorForm(firstname= firstname, lastname=lastname)
form.save()
category = Category.objects.filter(Q(book_category__icontains = book_category))
if category:
print(category)
else:
form = CategoryForm(book_category= book_category)#this is where the error
form.save()
author = Author.objects.filter(Q(firstname__icontains = firstname) & Q(lastname__icontains = lastname))
category = Category.objects.filter(Q(book_category__icontains = book_category))
for a in author:
print(a.book_author_id)
for c in category:
print(c.book_category_no)
book_title = request.POST.get('book_title')
book_cover = request.FILES.get('book_cover')
book_file = request.FILES.get('book_file')
book_year = request.POST.get('book_year')
book_tags = request.POST.get('book_tags')
book_summary = request.POST.get('book_summary')
form = Books(book_title = book_title, book_author_id = Author.objects.get(book_author_id = a.book_author_id), book_cover = book_cover,
book_file = book_file, book_year = book_year, book_summary = book_summary, book_category_no = Category.objects.get(book_category_no = c.book_category_no),
is_bookmarked = 0, is_downloaded = 0, is_read = 0, is_deleted = 0)
form.save()
return HttpResponse('Book Saved!')
else:
print(form.errors)
return HttpResponse('Not Valid')
This is what my models.py looks like:
from django.db import models
from django.utils import timezone
class Category(models.Model):
# book_category_no = models.CharField(primary_key=True, max_length=50)
book_category_no = models.AutoField(primary_key=True)
book_category = models.CharField(max_length=100)
class Meta:
db_table = "Category"
class Books(models.Model):
# book_id = models.CharField(primary_key=True, max_length=50)
book_id = models.AutoField(primary_key=True)
book_title = models.CharField(max_length = 100)
book_author_id = models.ForeignKey(Author, on_delete=models.CASCADE)
book_cover = models.ImageField(upload_to='media/')
book_file = models.FileField(upload_to='media/')
book_year = models.DateField()
book_tags = models.CharField(max_length = 100)
book_summary = models.CharField(max_length = 100)
book_category_no = models.ForeignKey(Category, on_delete=models.CASCADE)
date_added = models.DateField(default=timezone.now)
# book_info = models.CharField(max_length = 100, default="")
is_bookmarked = models.BooleanField()
is_downloaded = models.BooleanField()
is_read = models.BooleanField()
is_deleted= models.BooleanField(default=False)
class Meta:
db_table = "Books"
Traceback
File "C:\Users\user\AppData\Local\Programs\Python\Python35\lib\site-packages\django\core\handlers\exception.py" in inner
34. response = get_response(request)
File "C:\Users\user\AppData\Local\Programs\Python\Python35\lib\site-packages\django\core\handlers\base.py" in _get_response
115. response = self.process_exception_by_middleware(e, request)
File "C:\Users\user\AppData\Local\Programs\Python\Python35\lib\site-packages\django\core\handlers\base.py" in _get_response
113. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\user\AppData\Local\Programs\Python\Python35\lib\site-packages\django\views\generic\base.py" in view
71. return self.dispatch(request, *args, **kwargs)
File "C:\Users\user\AppData\Local\Programs\Python\Python35\lib\site-packages\django\views\generic\base.py" in dispatch
97. return handler(request, *args, **kwargs)
File "C:\ARMS\projectarms\arms\views.py" in post
315. form = CategoryForm(book_category= book_category)
Exception Type: TypeError at /arms/addbook/
Exception Value: init() got an unexpected keyword argument 'book_category'
`

Most certainly your Category or CategoryForm model is missing a field book_category which you use here:
category = Category.objects.filter(Q(book_category__icontains = book_category))

ModelMultipleChoiceField - cleaned_data have no value

I want to make simple blog with posts and tags, but i have a problem with adding tags from ModelMultipleChoiceField... after calling .is_valid(), cleaned_data should have selected tags but instead it is None.
print(form.cleaned_data)
returns:
{'description': u'xyz', 'title': u'xyz', 'haslo': u'', 'tags': None}
I have tried to change it to simple ChoiceField with initial choices from table but with same result.
My models:
class Tag(models.Model):
nazwa = models.CharField(max_length=24)
def __str__(self):
return self.nazwa
def __unicode__(self):
return self.nazwa
class Post(models.Model):
tytul = models.CharField(max_length=200)
skrocona_tresc = models.CharField(max_length=350, blank=True)
tresc = models.TextField(blank=True)
haslo = models.CharField(max_length=24, blank=True)
data = models.DateTimeField(auto_now=False, auto_now_add=True)
id_user = models.ForeignKey(User, on_delete=models.CASCADE)
tags = models.ManyToManyField(Tag)
Form:
class PostAddForm(forms.ModelForm):
title = forms.CharField(widget=forms.TextInput(attrs={'class': 'form-control'}),required=False)
password = forms.CharField(widget=forms.PasswordInput(attrs={'class': 'form-control'}),required=False)
description = forms.CharField(widget=forms.TextInput(attrs={'class': 'form-control'}),required=False)
tags = forms.ModelMultipleChoiceField(queryset=Tag.objects.all(), required=False)
class Meta:
model = Post
fields = [
'title',
'password',
'description',
'tags'
]
and view:
def add_post(request):
forma_PA = PostAddForm(request.POST or None)
if request.is_ajax():
if forma_PA.is_valid():
post = forma_PA.save(commit=False)
post.tresc = request.POST.get('html')
post = Post(tytul=forma_PA.cleaned_data.get('title'),
id_user_id=request.user.id,
skrocona_tresc=forma_PA.cleaned_data.get('description'),
tresc=request.POST.get('html'),
haslo=forma_PA.cleaned_data.get('password'),
)
post.save()
tagi = forma_PA.cleaned_data['tags']
print(forma_PA.cleaned_data)
if(tagi):
post.tags.add(tagi)
context = {
'form': forma_PA
}
return render(request, 'Blog/add_post.html', context)
i am just starting with Django ;/