unable to save changes to objects with form.save()

Question

I am writing a control view function edit_article to update fields of title and content of model table Article:

To update the title and content, I employed article=form.save

def edit_article(request, pk):
    article = Article.objects.get(pk=pk)

    if request.method == "POST":
        form = ArticleForm(data=request.POST)
        print(request.POST)
        if form.is_valid():
           article = form.save()

It reports error when issue submitting

django.db.utils.IntegrityError: (1048, "Column 'owner_id' cannot be null")

I did not change owner_id, just keep it as its previous state.

The problem is solved by explicitly re-assign attribute:

    if form.is_valid():
        # article = form.save()
        article.title = form.cleaned_data['title']
        article.content = form.cleaned_data['content']
        article.save()

The model Article

class Article(models.Model):
    STATUS = (
        (1,  'normal'),
        (0, 'deleted'),
    )
    owner = models.ForeignKey(User, on_delete=models.CASCADE)
    block = models.ForeignKey(Block, on_delete=models.CASCADE)
    title = models.CharField(max_length=100)
    content = models.TextField() # set the widget
    status = models.IntegerField(choices=STATUS)
    date_created = models.DateTimeField(auto_now_add=True)
    date_updated = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ("id",)

    def __str__(self):
        return self.title

Why form.save() failed as a shortcut?

if that, should manually add article.owner=article.owner_id form.save() @Mate — Wizard
– Wizard, Commented Jul 10, 2018 at 3:14

Rohan · Accepted Answer · 2018-07-10 03:42:49Z

2

If you want to update existing record, you should pass instance object of that model to the form.

So your code would change to

if request.method == "POST":
    form = ArticleForm(instance=article, data=request.POST)
...

answered Jul 10, 2018 at 3:42

Rohan

53.5k12 gold badges95 silver badges89 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

unable to save changes to objects with form.save()

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related