pass form instance in django formview

Question

I have a forms.py file as

class SocialMediaForm(forms.ModelForm):
    class Meta:
        model = SocialMedia
        fields = "__all__"
        exclude = ("doctor",)
        labels = {}
        widgets = {
            "whatsapp": forms.TextInput(attrs={"class": "form-control"}),
            "telegram": forms.TextInput(attrs={"class": "form-control"}),
            "facebook": forms.TextInput(attrs={"class": "form-control"}),
            "instagram": forms.TextInput(attrs={"class": "form-control"}),
            "linkedin": forms.TextInput(attrs={"class": "form-control"}),
        }

with a view.py file

class SocialMediaProfile(FormView):
    model = DoctorSocialMedia
    form_class = SocialMediaForm
    success_url = "."
    template_name = "doctor/social_media_profile.html"

the question is how could i pass a form instance to template in FormView view as SocialMediaForm(instace=someInstance) # in fun based views.

Abdul Aziz Barkat · Accepted Answer · 2021-03-07 09:30:00Z

1

To update an instance of a model one should ideally be using UpdateView:

from django.views.generic.edit import UpdateView

class SocialMediaProfile(UpdateView):
    model = DoctorSocialMedia
    form_class = SocialMediaForm
    success_url = "."
    template_name = "doctor/social_media_profile.html"

This would automatically get the instance from the keyword arguments passed from the urls if they are named as pk or slug. You can set slug_url_kwarg or pk_url_kwarg if they are passed with a different name in the url to the view.

If you really need to pass some of your own keyword arguments to the form you should override get_form_kwargs (Note: This method would automatically pass the model instance (if exists) if the view inherits from ModelFormMixin). Example:

class SocialMediaProfile(FormView):
    model = DoctorSocialMedia
    form_class = SocialMediaForm
    success_url = "."
    template_name = "doctor/social_media_profile.html"

    def get_form_kwargs(self):
        kwargs = super().get_form_kwargs()
        kwargs.update({'some_extra_kwarg': 'my_data'})
        return kwargs

edited Mar 7, 2021 at 9:30

answered Mar 7, 2021 at 9:24

Abdul Aziz Barkat

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5 Comments

Ali Aref Over a year ago

thanks for replay sir, there i faced two issues first if the related form doesn't exists it should return an empty form(i don't know) and second that what if user changed the pk in **url ** so he/she should not be able to change other models instance.. (don't know possible with which view)

Abdul Aziz Barkat Over a year ago

@AliAref I don't understand what does "related form doesn't exists" mean? Also by "user changed the pk" do you mean the user manually editing the url?

Ali Aref Over a year ago

i mean if there was no instances so it should be empty to create one. and yes changing pk manually from url. (sorry for bad explanations)

Abdul Aziz Barkat Over a year ago

@AliAref please show your model DoctorSocialMedia in the question, by any chance is the field doctor a one to one field with the user.

Ali Aref Over a year ago

i used updateview and passed my parameters to form now working :) Thaaanks so much sir

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