Django BooleanField always checked even when value is false

Question

I have a BooleanField in a standard Django Form defined as:

my_boolean_field = BooleanField(initial=True)

when I render my form with initial data, and my_boolean_field is set to an initial value of False, when the form renders it is still checked despite the fact that the value is false as the html shows:

<p><label for="id_2">my_boolean_field</label>: <input checked="checked" type="checkbox" name="2" value="False" id="id_2" /> </p>

Has anyone else experienced this, or knows how to fix it so that when the initial data/input value is false then the checkbox is not checked?

UPDATE: Even if I remove the initial=True argument from the BooleanField the same thing happens.

Francis Yaconiello · Accepted Answer · 2012-09-11 14:08:43Z

Firstly, you can't have required=False on a BooleanField, use NullBooleanField instead:

let me know what the HTML output of the new widget is once you've done this?

EDIT

I assumed that this is a ModelForm. Is this a regular django.forms.Form?

EDIT 2

My test form:

from django import forms class MyForm(forms.Form) : """The test form""" my_boolean_field = forms.BooleanField(initial=True)

My template:

<div> {{ form.my_boolean_field.label_tag }} {{ form.my_boolean_field }} {{ form.my_boolean_field.errors }} </div>

This is what I get for output when I view page source. EDITED

<div> <label for="id_my_boolean_field">My boolean field</label> <input type="checkbox" name="my_boolean_field" id="id_my_boolean_field" /> </div>

My View NEW

form = MyForm(initial={'my_boolean_field':False})

What you are showing and what I'm seeing aren't matching up. paste your full form, view and template please?

EDIT 3

I only see output like this:

<div> <label for="id_my_boolean_field">My boolean field</label> <input checked="checked" type="checkbox" name="my_boolean_field" value="False" id="id_my_boolean_field" /> </div>

when I put False in quotes:

form = FormLogin(initial={'my_boolean_field':"False"})

this is a standard Form, and actually my field is required so I have edited my question, to removed required=False, but I am still getting the same behaviour
are you creating your form with initial data, eg. form = MyForm(initial={'my_boolean_field':False})
AHHHHH that is the problem, i was actually generating the initial data dynamically and the boolean values were getting cast to strings!! Thanks a lot that was a really good spot!!

Josiah42 · Accepted Answer · 2014-02-27 19:51:14Z

I'm posting this answer because I had the same problem and Francis's answer didn't help me.

I eventually found the solution was to re-run manage.py syncdb. My fields had previously been IntegerField and I had converted them to BooleanField. BooleanField read the presence of value="0" in the database as being initialized and checked. This is regardless of what your model says. You want to see:

<input checked="checked" id="id_cost_track_destruction" name="cost_track_destruction" type="checkbox">

when you inspect an element. Since this bug shows up in the Django Admin panel, it has nothing to do with your forms.py.

This is purely a model and database issue. Try regenerating your database if you've changed your models.py field types.

wizurd · Accepted Answer · 2022-08-21 07:34:20Z

For those who are using ModelForms, this is what worked for me:

password_required = forms.CheckboxInput(attrs={'checked' : ''})

This correctly generates the checkbox with it unchecked.

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