update database with form in django

Question

I want to save data to the database. I have two tables as shown in the models.py. Every book has several publication. I wish to insert the price of each pub in the form and update thereafter the database. The problem now when I input the price it adds anything on the table Version, another point is that at the beginning the user has no book that is at the time that he adds money it creates a book.

models.py

class book(models.Model):
        user = models.OneToOneField(User,related_name='user')
        Price_init = models.IntegerField(default=0)
        Date_creation = models.DateTimeField('date creation')

class version(models.Model):
        date_pub = models.DateTimeField('date pub')
        price = models.IntegerField()
        Dprice = models.IntegerField()
        book = models.ForeignKey(book)

my view.py

@login_required(login_url='/view/login/')
def addVersion(request,Book_id):
    response={}
    book1 = book.objects.get(id=book_id)
    class AddForm(forms.Form):
        Price = forms.IntegerField()
    if request.method=='post':
       form=AddForm(request.POST)
       if form.is_valid():
           try:
                version1 = Version()
                version1.date_pub= datetime.now()
                version1.price=form.cleaned_data['Price']
                version1.book_id= book_id
                version1.Dprice = -(form.cleaned_data['Price'])
                version1.save()
           except:
                xxx=0
           return render_to_response('addVersion.html')
       else:
           form.errors
           return HttpResponse('form invalid')
    else:
        return render(request,'frontend/addVersion.html',response)
    tr.save()
    return render(request,'frontend/addVersion.html',response)

addVersion.html

<form name="form" method="POST" action="" id="form"> {% csrf_token %}
                        <p style="text-align:center" class="text-error"></p>
                <p style="text-align:center;margin-top:20px"><input id="" name="form" required="required" style="width:100px" value="{{Price}}" type="text"></p>
        <p> <br></p>

here is the answer

Vikram Baliga
– Vikram Baliga

2020-05-21 15:30:27 +00:00
Commented May 21, 2020 at 15:30 — Vikram Baliga
– Vikram Baliga, Commented May 21, 2020 at 15:30

Raja Simon · Accepted Answer · 2015-01-07 12:24:06Z

0

Question : 1 The problem now when I input the price it adds anything on the table Version. ?

Solution : do form validation correctly

bookObj = book.objects.get(id=book_id)
if request.method=='POST':
   form=AddForm(request.POST)
   if form.is_valid():
      version1 = Version()
      version1.date_pub= datetime.now()
      version1.price = form.cleaned_data['Price']
      version1.book_id = book_id
      version1.Dprice = form.cleaned_data['Price']
      version1.save()

Question : 2 The beginning the user has no book that is at the time that he adds money it creates a book. ?

Where is the money came from ?

edited Jan 7, 2015 at 12:24

answered Jan 6, 2015 at 18:31

Raja Simon

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8 Comments

Hayat Over a year ago

Thank you for your answer but I can't see the difference between what I wrote and what you have proposed to me

Hayat Over a year ago

I put "post" in uppercase and I had "form invalid" ,do you know how to resolve this problem?

Hayat Over a year ago

Sorry, its "addForm" not "ajouterForm", I copied wrong code, I'll edit it

Hayat Over a year ago

it must save just an integer, I will put the javascript it

Hayat Over a year ago

Each book has multiple version and each version is characterized by a price, each user has a book, I have a form that contains an input, which will allow the user to enter the price,Dprice is the opposite of price, simply if price =50, Dprice = -50, date_pub , it retrieves the date that the user add a version

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