Вопрос:
Я пытаюсь назначить значение user в моих views.py из другой формы, но я всегда получаю следующую ошибку. Cannot assign «u’applematter'»: «Student.user» must be a «User» instance. как я могу заставить пользователя скрытого поля соответствовать тому, что я пишу в другом поле.
Файл views.py
from django.shortcuts import render from django.http import HttpResponse from django.http import HttpResponseRedirect from famu.forms import * from django.contrib.auth.decorators import login_required @login_required(login_url=») def enroll(request): if request.method == ‘POST’: form = UserForm(request.POST,) form2 = StudentCreate(request.POST) if form.is_valid() and form2.is_valid(): new_user = form.save(commit=False) new_student = form2.save(commit=False) new_student.user = (new_user.username) new_user.save() new_student.save() return HttpResponseRedirect(‘/’) else: form = UserForm# An unbound form form2 = StudentCreate return render(request, ‘famu/enroll.html’, { ‘form’: form, ‘form2’: form2 })
forms.py
from django.contrib.auth.forms import UserCreationForm from django.contrib.auth.models import User from django import forms from famu.models import Student class UserForm(UserCreationForm): class Meta: model = User fields = (‘first_name’, ‘last_name’, ’email’,’username’,) class StudentCreate(forms.ModelForm): class Meta: model = Student exclude =[‘user’,]
model.py
from django.db import models from django.contrib.auth.models import User class Student(models.Model): CLASSIFICATION = ( (‘FR’, ‘Freshman’), (‘SO’, ‘Sophomore’), (‘JR’, ‘Junior’), (‘SR’, ‘Senior’), (‘GR’, ‘Graduate’), ) TERMS = ( (‘F’, ‘Fall’), (‘S’, ‘Spring’), (‘Su’, ‘Summer’), ) MAJOR = ( (‘CS’, ‘Computer Science’), (‘CY’, ‘Computer Systems’), (‘IT’, ‘Information Technology’), ) user = models.ForeignKey(User) student_id = models.IntegerField(primary_key=True, max_length=9) classification = models.CharField(max_length=2, choices=CLASSIFICATION) enrolled_year = models.IntegerField(max_length=4) enrolled_term = models.CharField(max_length=2, choices=TERMS) major = models.CharField(max_length=2, choices=MAJOR) street_number = models.IntegerField(max_length=10) street_name = models.CharField(max_length=45) apt_number = models.CharField(‘apt #’, max_length=10, blank=True, ) city = models.CharField(max_length=30) state = models.CharField(max_length=2) zipcode = models.IntegerField(‘Zip Code’, max_length=5, ) last_modified = models.DateTimeField(auto_now=True) Лучший ответ:
Вы должны сначала сохранить экземпляр new_user а затем назначить его в новом экземпляре студента.
Соответствующий код
@login_required(login_url=») def enroll(request): if request.method == ‘POST’: form = UserForm(request.POST,) form2 = StudentCreate(request.POST) if form.is_valid() and form2.is_valid(): new_user = form.save(commit=False) new_user.save() #form.save() should also work rather than this 2 statements new_student = form2.save(commit=False) new_student.user = new_user #assign user instance, not username new_student.save()