CODEWITHSUNDEEP
djangodjango-admin
bartek
bartek

Reputation: 3011

How to set the default/initial value for a field in a Django AdminForm?

I have a Django admin form. And now I want to fill it's initial field with data based on my model. So I tried this:

class OrderForm(forms.ModelForm):
    class Meta:
        model = Order

    email = CharField(initial="null", widget=Textarea(attrs={'rows': 30, 'cols': 100}))

    def __init__(self, *args, **kwargs):

        self.request = kwargs.pop('request', None)

        products = kwargs['instance'].products.all()

        self.message = purchase_message % (
            "".join(["<li>" + p.name + ": " + str(p.price) + "</li>" for p in products]),
            reduce(lambda x, y:x + y.price, products, 0)
        )

        # and here I have a message in self.message variable

        super(OrderForm, self).__init__(*args, **kwargs)

At this point i don't know how to access email field to set it's initial value before widget is rendered. How can i do this?

Upvotes: 31

Views: 39176

Answers (6)

Alex_FIR_IT
Alex_FIR_IT

Reputation: 71

I don't know why but form.base_fields['my_field_name'].initial = 'abcd' doesn't really work in my case at all. I came up with the following code below after a few days.

models.py:

class Record(SaveMixin, models.Model):
    class ViewStatus(models.IntegerChoices):
        DRAFT = 0, "Черновик"
        PUBLISHED = 1, "Опубликовано"

    is_published = models.BooleanField(choices=ViewStatus.choices,
                                       verbose_name="Статус",
                                       default=ViewStatus.DRAFT
                                       )

admin.py:

def get_form(self, request, obj=None, **kwargs):
    form = super(MealRecordAdmin, self).get_form(request, obj, **kwargs)
    if obj:
        if obj.is_published:
            initial_choices = form.base_fields['is_published'].choices

            published_choice = initial_choices.pop(Record.ViewStatus.PUBLISHED)

            initial_choices.insert(0, published_choice)

    return form

Now, if user changes an already existing model instance through admin panel, the default value for "is_published" is being taken from DataBase. If I'm wrong about anything, tell me, please, about it

Upvotes: 0

valex
valex

Reputation: 5779

This code is worked for me (Django 1.11):

from django import forms

class MyAdminForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.initial['field_name'] = 'initial_value'

Upvotes: 4

Wtower
Wtower

Reputation: 19902

Since Django 1.7 there is a function get_changeform_initial_data in ModelAdmin that sets initial form values:

def get_changeform_initial_data(self, request):
    return {'name': 'custom_initial_value'}

EDIT: Apart from that, @Paul Kenjora's answer applies anyway, which might be useful if you already override get_form.

In case of inline (InlineModelAdmin) there is no get_changeform_initial_data. You can override get_formset and set formset.form.base_fields['my_field_name'].initial.

Upvotes: 51

Paul Kenjora
Paul Kenjora

Reputation: 2004

Assuming the value is based on 'request' you should use this:

class MyModelAdmin(admin.ModelAdmin):
    def get_form(self, request, obj=None, **kwargs):
        form = super(MyModelAdmin, self).get_form(request, obj, **kwargs)
        form.base_fields['my_field_name'].initial = 'abcd'
        return form

Upvotes: 79

toto_tico
toto_tico

Reputation: 19027

I needed the first solution of pastylegs since the other ones overwrite the whole Widget including, for example, the help text. However, it didn't work for me as he posted it. Instead, I had to do this:

self.fields['email'].initial = 'something'

In my case, I was trying to do a personalized auto-increment(based on current data and not a simple default) in a field of a django admin form.

Upvotes: 7

Timmy O&#39;Mahony
Timmy O&#39;Mahony

Reputation: 53971

I'm not too sure what you need to set email to, but You can set the initial values in lots of different places.

Your function def init() isn't indented correctly which i guess is a typo? Also, why are you specifically giving the email form field a TextInput? It already renders this widget by default

You can set the email's initial value in your form's initialized (def __ init __(self))

(self.fields['email'].widget).initial_value = "something"

or in the model.py

email = models.CharField(default="something")

or as you have in forms.py

email = models.CharField(initial="something")

Upvotes: 9

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