CODEWITHSUNDEEP
pythondjangoforms
Liondancer
Liondancer

Reputation: 16469

Forms that comprise of two models

I am trying to create a model form in Django. This form has inputs for first_name, last_name, email, and contact_request.

I have two models:

from django.db import models

class User(models.Model):
    first_name = models.CharField(max_length=50)
    last_name = models.CharField(max_length=50)
    # phone_number =
    email = models.EmailField()

    def __str__(self):
        return self.first_name + " " + self.last_name

    class Meta:
        db_table = "home_users"


class ContactRequest(models.Model):
    user = models.ForeignKey(User)
    message = models.TextField(max_length=500)
    datetime_created = models.DateTimeField("Date/time created")

    class Meta:
        db_table = "home_contactrequests"

In my form, upon submission, because there is a OneToMany relationship between Users and ContactRequests, a new row will be added to both home_users and home_contactrequests when there is a new email submitted through the form. If the email exists in the home_users table, then a new row will only be added to home_contactrequests with it's foreign key referencing a user.id

I'm not quite sure how to implement this right now as I am new to model forms and Django as well. I was wondering if someone could guide me to show me the process and logic involved in creating this type of form.

Upvotes: 0

Views: 45

Answers (1)

Burhan Khalid
Burhan Khalid

Reputation: 174614

Use get_or_create on the User model to fetch a user if one with that email already exists:

Here is one way you would wire this up in your view:

def some_view(request):
    form = SomeForm(request.POST or None)
    if form.is_valid():
        obj, created = User.objects.get_or_create(email=form.cleaned_data['email'], 
                                                  first_name=form.cleaned_data['first_name'],
                                                  last_name=form.cleaned_data['last_name'])
        ContactRequest.objects.create(user=obj,
                                      message=form.cleaned_data['message'],
                                      datetime_created=datetime.datetime.now())
        return redirect('/thanks')
     return render(request, 'form.html', {'form': form})

You can help yourself a bit by setting the auto_now_add option for the datetime_created field; this way your timestamp is automatically saved.

Upvotes: 1

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