How do you pass request data to Forms in Django? - django

Question

here I am using model forms and trying to make my placeholder dynamic.
my approach is to take request data, pass it into widgets with f string.
what I am trying to achieve is
{'placeholder': f"commenting as {request.user.username}"}
HERE IS MY CODE.
class CommentForm(ModelForm):
class Meta:
model = Comment
fields = ("body",)
widgets = {
"body": forms.TextInput(
attrs={
"placeholder": "Enter your comment",
"class": "comment-form-text",
}
),
}
labels = {
"body": "",
}

Answer 1

This is how I usually pass the request object in a form.
Note: all you need is the CommentForm.__init__ and calling it with CommentForm(request.POST, request=request)
I just added the custom save, but commented it out, to show you can also access it there and do some cool things! :-)
forms.py
class CommentForm(ModelForm):
class Meta:
model = Comment
fields = ("body",)
widgets = {
"body": forms.TextInput(
attrs={
"class": "comment-form-text",
}
),
}
labels = {
"body": "",
}
def __init__(self, *args, **kwargs):
# # Keeping track of if it's an edit form or not ( Not Required, but handy )
# self.is_edit = True if 'instance' in kwargs else False
# Store Request Object
self.request = kwargs.pop('request') if 'request' in kwargs else None
super(CommentForm, self).__init__(*args, **kwargs)
# You can add *Any* custom attribute here to any field
self.fields['body'].widget.attrs={'placeholder': 'commenting as {0}'.format(self.request.user.username)}
# # Just showing that you can also use it in a Custom Save Method :-)
# def save(self, commit=True):
# obj = super(CommentForm, self).save(commit=False)
#
# # Note: Keeping track of **if** it's an edit so we don't re-add to the field!
# if not self.is_edit:
# # Use Request to fill a field (New)
# obj.creator = request.user
# else:
# # Use request to fill a field (edit)
# obj.last_editor = request.user
views.py
def commentformview(request):
form = CommentForm(data=request.POST or None, request=request)
if request.method == 'POST':
if form.is_valid():
form.save()
# redirect
data = {
'form': form,
}
return render(request, 'commentform.html', data)