I am making a Django Gym app following this tutorial https://www.youtube.com/watch?v=Mag1n3MFDFk&list=PL2aJidc6QnyOe-fp1m4yKHjcInCRTF53N&index=3I wanted to write a form page that the user (once logged in) can fill and become a subscriber. In the tutorial he used a new model Enrollment to fill the data with but I have a model Pretplatnik (Subscriber in english) that has a OneToOne relationship with django user model.Also two other models that are FK to Pretplatnik for Plan that the user can subscribe to and a model for Trainer that the user can choose.
models.py
from django.db import modelsfrom django.contrib.auth.models import User# Create your models here.class Oznaka(models.Model): naziv = models.CharField(max_length=200) def __str__(self): return self.nazivclass Plan(models.Model): naziv=models.CharField(max_length=150) cijena=models.IntegerField() max_clanova=models.IntegerField(null=True) oznake=models.ManyToManyField(Oznaka, default=None, blank=True, related_name='oznake') def __str__(self): return '%s' % self.nazivclass Trener(models.Model): ime=models.CharField(max_length=150) image=models.ImageField(upload_to='static/assets/img/team', default=None) def __str__(self): return self.imeclass Pretplatnik(models.Model): korisnik=models.OneToOneField(User, on_delete=models.CASCADE) trener=models.ForeignKey(Trener, on_delete=models.CASCADE, related_name='pretplatnici') plan=models.ForeignKey(Plan, on_delete=models.CASCADE, null=True) datum_r=models.DateField(blank=True,null=True) spol=models.CharField(max_length=25, default=None) adresa=models.CharField(max_length=150) def __str__(self): return str(self.korisnik)class Pretplata(models.Model): pretplatnik=models.ForeignKey(Pretplatnik, on_delete=models.CASCADE, null=True) plan=models.ForeignKey(Plan, on_delete=models.CASCADE, null=True)class CustomModelName(models.Model): user = models.ForeignKey(User, on_delete=models.CASCADE)from django import formsfrom django.forms import ModelFormfrom teretana.models import *class PretplatnikForm(forms.ModelForm): plan = forms.ModelChoiceField(queryset=Plan.objects.all(), to_field_name = 'naziv', empty_label="Select Plan") trener = forms.ModelChoiceField(queryset=Trener.objects.all(), to_field_name = 'ime', empty_label="Select Trainer") class Meta: model = Pretplatnik fields = ['trener', 'plan', 'datum_r', 'spol', 'adresa'] GENDER_CHOICES = ( ('', 'Select a Gender'), ('Female', 'Female'), ('Male', 'Male'), ) widgets = {'trener':forms.TextInput(attrs={'class':'form-control','placeholder':'Select Trainer'}),'plan':forms.TextInput(attrs={'class':'form-control','placeholder':'Select Plan'}),'datum_r':forms.DateInput(attrs={'class':'form-control','placeholder':'Enter Date of Birth'}),'spol':forms.Select(choices=GENDER_CHOICES,attrs={'class': 'form-control'}),'adresa':forms.TextInput(attrs={'class':'form-control','placeholder':'Enter Address'}), } labels={'plan':'Select Plan','trener':'Select Trainer','datum_r':'Datum_r', }views.py
def enroll(request): if request.method == 'POST': form = PretplatnikForm(request.POST) if form.is_valid(): form.save() form = PretplatnikForm() return render(request, 'enroll.html', {'form': form})enroll.html
{% extends 'base.html' %} {% block title %} Enrollment for Gym {% endblock title%}{% block head %}<h2>Join The Best Gym In Rijeka</h2><div class="container mt-2"><div class="row"><div class="col-md-3"></div><div class="col-md-6"> {% for message in messages %}<div class="alert alert-{{message.tags}} alert-dismissible fade show" role="alert"><strong></strong> {{message}}<button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button></div> {% endfor %}<form action="/enroll" method="post">{% csrf_token %} {% csrf_token %}<div class="form-group"><label class="form-label">{{form.trener.label_tag}}</label> {{form.trener}}</div><form action="/enroll" method="post">{% csrf_token %} {% csrf_token %}<div class="form-group"><label class="form-label">{{form.plan.label_tag}}</label> {{form.plan}}</div><form action="/enroll" method="post">{% csrf_token %} {% csrf_token %}<div class="form-group"> {{form.spol}}</div><br><form action="/enroll" method="post">{% csrf_token %} {% csrf_token %}<div class="form-group"> {{form.adresa}}</div><br><form action="/enroll" method="post">{% csrf_token %} {% csrf_token %}<div class="form-group"> {{form.datum_r}}</div><br><div class="form-group"><input type="number" class="form-control mt-2" value="{{user.username}}" name="PhoneNumber" placeholder="Enter Your Number" readonly required /></div></div><br><div class="d-grid gap-2"><button class="btn btn-warning" type="submit">Enroll</button></div></form></div><div class="col-md-3"></div></div></div>{% endblock head %}He is using HTML form to get the data but I've tried to and it doesn't work for FK (or it does but I don't know how to implement it) so I've tried with ModelForm. But now I get this error since I presume the ModelForm doesn't know that the django user data which is PK for Pretplatnik is already filled (the user cannot fill the form unless logged in).I've tried to change the views file like I've seen on another question posted here but then I get the error:AttributeError at /enroll
'Pretplatnik' object has no attribute 'is_valid'
views.py
def enroll(request): if not request.user.is_authenticated: messages.warning(request,"Please Login and Try Again") return redirect('/login') if request.method == 'POST': form = PretplatnikForm(request.POST) form = form.save(commit=False) if form.is_valid(): form.save() form = PretplatnikForm() return render(request, 'enroll.html', {'form': form})