django form set current login user - django

Question

#login_required
def post_review(request):
if request.method == 'POST':
formset = ReviewForm(request.POST)
if formset.is_valid():
formset.save(commit=False)
#formset.author = User.objects.get(pk=int(request.user.id))
formset.pub_date = datetime.datetime.now
formset.save()
return HttpResponseRedirect(reverse(review_index))
else:
formset = ReviewForm()
return render_to_response("review/post_review.html",
{"formset": formset}, context_instance=RequestContext(request),
)
I have this view, I want to auto set the current logged-in user in my review form author field. But I dont know how. Any ideas/hint pls?
Below is my form:
class ReviewForm(ModelForm):
class Meta:
model = Review
fields = ('title','category', 'body', )
widgets = {
'body': Textarea(attrs={'cols': 60, 'rows': 20}),
}

Answer 1

I've always done this by accepting a new kwarg in my form's __init__, and saving the value until save-time.
class ReviewForm(ModelForm):
class Meta:
model = Review
fields = ('title','category', 'body', )
widgets = {
'body': Textarea(attrs={'cols': 60, 'rows': 20}),
}
def __init__(self, *args, **kwargs):
self._user = kwargs.pop('user')
super(ReviewForm, self).__init__(*args, **kwargs)
def save(self, commit=True):
inst = super(ReviewForm, self).save(commit=False)
inst.author = self._user
if commit:
inst.save()
self.save_m2m()
return inst
And then in my view:
def post_review(request):
# ... snip ...
if request.method == 'POST'
form = ReviewForm(request.POST, user=request.user)
if form.is_valid():
form.save()
return HttpResponseRedirect('/thanks/') #or whatever the url
else:
# Don't forget to add user argument
form = ReviewForm(user=request.user)
# ... snip ...
If Review.author isn't a required field, you can add a second value to the kwargs.pop call to set a default, like None. Otherwise, if the user kwarg isn't provided, it'll raise an error, effectively making it a required argument.

Answer 2

As an alternative solution, in Django 2+ using a form view - such as a CreateView or FormView, I can simply pass the self.request.user to my pre-saved form model:
class AppCreateView(CreateView):
model = models.App
fields = ['name']
success_url = '/thanks/'
def form_valid(self, form):
app_model = form.save(commit=False)
app_model.author = self.request.user
# app_model.user = User.objects.get(user=self.request.user) # Or explicit model
app_model.save()
return super().form_valid(form)
I agree the class based view is not important here. The important line is app_model.author = self.request.user.
The model is not special:
from django.db import models
from django.contrib.auth.models import User
class App(models.Model):
author = models.ForeignKey(User, on_delete=models.CASCADE)
name = models.CharField(max_length=255, help_text="Arbitrary name")
created = models.DateTimeField(auto_now_add=True, max_length=255)

Answer 3

I have a formset mixin which lets you pass extra arguments to the generated forms.
Just add the mixin as the first base class, set a dictionary named "form_kwargs" as a class attribute to describe the
arguments to pass.
from django.forms.formsets import BaseFormSet
class BaseKwargsFormSet(BaseFormSet):
"""
A formset mix-in to allow keyword arguments to be passed to constructed forms
For model_formsets, derive from this model *first* because django's formsets
can't grok the extra arguments.
To use, specify a dictionary with the kwargs & default values as an attribute
named "form_kwargs" on the formset base class.
example:
class BaseUserModelFormset (BaseKwargsFormSet, BaseModelFormSet):
form_kwargs = { 'user': None }
UserFormset = modelformset_factory (usermodel, form=userform,
formset=BaseUserModelFormset)
formset = UserFormset (request.POST or None, user=request.user)
"""
def __init__(self, *args, **kwargs):
form_kwargs = getattr(self, 'form_kwargs', {})
self.form_kwargs = dict((k, kwargs.pop(k, v)) for k, v in form_kwargs.items())
super(BaseKwargsFormSet, self).__init__(*args, **kwargs)
def _construct_form(self, index, **kwargs):
kwargs.update(**self.form_kwargs)
return super(BaseKwargsFormSet, self)._construct_form(index, **kwargs)