Question

I’ve created a simple model

class Person(models.Model):
    name = models.CharField(max_length=25)
    surname = models.CharField(max_length=25)
    birth_date = models.DateField()
    ...

and a simple ModelForm

class PersonForm(ModelForm):
class Meta:
    model = Person

how can I put a Person object that I already have (e.g. Person.objects.get(pk=1)) to become an initial value for the form? I need to edit this object

Answer 1

From the docs:

# Creating a form to add an article.
>>> form = ArticleForm()

# Creating a form to change an existing article.
>>> article = Article.objects.get(pk=1)
>>> form = ArticleForm(instance=article)

so in your case, in your views.py:

person = Person.objects.get(pk=1)
form = PersonForm(instance=person)

https://docs.djangoproject.com/en/dev/topics/forms/modelforms/#modelform