表单未将用户数据保存到Django数据库中

Question

Python noob here trying to learn something very simple.

I'm trying to create a basic form that takes some personal information from a user and saves it into a sqlite3 table with the username of the user as the primary key.

My models.py looks like this:

class userinfo(models.Model):
    user = models.OneToOneField(settings.AUTH_USER_MODEL, primary_key= True, 
on_delete=models.CASCADE)
    name = models.CharField(max_length = 200, blank = True)
    email = models.EmailField(max_length= 300, default = 'Null')
    phone = models.CharField(max_length= 10, default = 'Null')

def __unicode__(self):
    return self.user

forms.py:

class NewList(forms.ModelForm):

    class Meta:
        model = userinfo
        exclude = {'user'}

views.py

def newlist(request):
    if request.method == 'POST':
        form = NewList(request.POST)
        if form.is_valid():
            Event = form.save(commit = False)
            Event.save()
            return redirect('/home')

    else:
        form = NewList()

    return render(request, 'home/newlist.html', {'form': form})

html:

{% load static %}

<form action="/home/" method="post">

{% csrf_token %}
{{ form.as_p }}

<input type="submit">

</form>

urls.py too, but I don't know how that would help:

urlpatterns = [
    url(r'^newlist/$', views.newlist, name='newlist')
]

So when I go to the url, I see the form. I can then fill the form, but when I submit the form, the data doesn't go into the database.

What am I doing wrong here?

Thanks in advance!

Answer 1

I think all you need to do is just save the form if it's valid, probably also add the userinfo as an instance of the form. You are also exluding the user from the form and need to assign it manually.

def newlist(request):
    if request.user.is_authenticated():
        user = request.user

        if request.method == 'POST':
            form = NewList(request.POST, instance=user.userinfo)
            if form.is_valid():
                form.save(commit=false)  
                form.user = user          
                form.save()
                return redirect('/home')
        else:
            form = NewList(instance=user.userinfo) # add this if you want it to automatically fill the form with the old data if there is any.

    return render(request, 'home/newlist.html', {'form': form})

The rest look like it should work.Except you need to send the post URL back to newlist:

{% load static %}
<form action="/newlist/" method="POST">

{% csrf_token %}
{{ form.as_p }}
</form>

If users are assigned at the creation of the model the first time, you don't need the user save, but since this is saving a users data you want to make sure they are logged in anyway:

def newlist(request): 
    if request.user.is_authenticated(): 
        user = request.user 
        if request.method == 'POST':
            form = NewList(request.POST, instance=user.userinfo)
            if form.is_valid():          
                form.save()
                return redirect('/home')
        else:
            form = NewList(instance=user.userinfo) # add this if you want it to automatically fill the form with the old data if there is any.

    return render(request, 'home/newlist.html', {'form': form})

The instance is the model it is either going to save to, or copying data from. In the: form = NewList(request.POST, instance=user.userinfo) part, it is taking the POST data from the form, and linking that to the specific model entry of user.userinfo, however, it will only save to the database when you call form.save().

The user.userinfo is just so you can get the correct form to save to, as userinfo is a onetoone model to user. Thus making it possible to get it with user.userinfo.

The form = NewList(instance=user.userinfo) part is where it takes the currently logged in user's userinfo and copies into the form before it is rendered, so the old userinfo data will be prefilled into the form in the html. That being if it got the correct userinfo model.