Checkbox not visible

[PaoloC68]

I am using checkboxes in a model which is using the django-multiselectfield field.
It is almost all fine except that the actual input checkbox is hidden by the css and cannot be set.
What can I do to render the input instead of having it hidden?

Thanks

[PaoloC68]

The issue is that with django 1.9 the input tag is wrapped into the label as can be seen here
So I had to override that renderer.

Example:

class CustomChoiceInput(ChoiceInput):
    def render(self, name=None, value=None, attrs=None, choices=()):
        if self.id_for_label:
            label_for = format_html(' for="{}"', self.id_for_label)
        else:
            label_for = ''
        attrs = dict(self.attrs, **attrs) if attrs else self.attrs
        return format_html('{}<label{}> {}</label>', self.tag(attrs), label_for, self.choice_label)


class CustomCheckboxChoiceInput(CustomChoiceInput):
    input_type = 'checkbox'

    def __init__(self, *args, **kwargs):
        super(CustomCheckboxChoiceInput, self).__init__(*args, **kwargs)
        self.value = set(force_text(v) for v in self.value)

    def is_checked(self):
        return self.choice_value in self.value


class CustomCheckboxFieldRenderer(ChoiceFieldRenderer):
    choice_input_class = CustomCheckboxChoiceInput


class TriggerAdminForm(forms.ModelForm):
    class Meta:
        model = Trigger
        exclude = []
        widgets = {
            'thresholds': CheckboxSelectMultiple(renderer=CustomCheckboxFieldRenderer),
            'conditions': CheckboxSelectMultiple(renderer=CustomCheckboxFieldRenderer),
            'actions': CheckboxSelectMultiple(renderer=CustomCheckboxFieldRenderer),
        }

[SalahAdDin]

@PaoloC68 Did you see view this bug in latest versions?

[em1le]

@SalahAdDin I can affirm that the bug is still on version 1.10

[SalahAdDin]

Really? Have you any idea?

@f1nality Man?

[tehdoorsareopen]

Here is the solution for Django 2.0 -> rewriting checkbox_option template

admin.py

from django.forms import CheckboxSelectMultiple

# Overriding standart CheckboxSelectMultiple for jet admin
class JetCheckboxSelectMultiple(CheckboxSelectMultiple):
    option_template_name = 'admin/forms/widgets/checkbox_option.html'

@admin.register(Example)
class ExampleAdmin(admin.ModelAdmin):
    formfield_overrides = {
        models.ManyToManyField: {'widget': JetCheckboxSelectMultiple},
    }

admin/forms/widgets/checkbox_option.html

{% if wrap_label %}{% include "django/forms/widgets/input.html" %}<label class="vCheckboxLabel" {% if widget.attrs.id %} for="{{ widget.attrs.id }}"{% endif %}>{% endif %}{% if wrap_label %} {{ widget.label }}</label>{% endif %}

[Sudiptoganguly]

As per your above solutions i have copy paste code but i am facing issues
i.e
models.ManyToManyField: {'widget':JetCheckboxSelectMultiple},
AttributeError: module 'competition.models' has no attribute 'ManyToManyField'

Please i need a solution urgent

[linxlunx]

When I realized that my django admin with Jet was not rendering the checboxes, I found this issue still open here.

After trying some steps with no luck, I found that this css property below cause the checkboxes not rendered.

/jet/static/jet/css/_forms.scss

input[type=checkbox] {
  ...
  display: none;
  ...
}

So I create custom css file to override the property.

admin.py

class MyAdmin(admin.ModelAdmin):
    class Media:
        css = {
            'all': ('css/checkbox-override.css',),
        }

static/css/checkbox-override.css

input[type=checkbox] {
  display: inline;
}

With this custom css, the checkboxes will be rendered in the add and change view. But you will see double checkboxes in the list view. So I remove the label from the list view with this css.

static/css/checkbox-override.css

label[for*="checkbox"]
{
    display:none;
}

The double checkboxes will be removed from the list view. But sure, with this trick, it will only be rendered as a plain checkbox.

[chrisdevilliers]

Expanding on @tehdoorsareopen 's comment. The following works for Django 3.2.6, django-3-jet 1.0.8 and django-multiselectfield 0.1.12:

<project>/settings.py (see: docs)

INSTALLED_APPS = [
    ...
    "django.forms"
]

TEMPLATES = [
    {
        "APP_DIRS": True,
        ...
    }
]

FORM_RENDERER = "django.forms.renderers.TemplatesSetting"

<app>/admin.py

from django.forms import CheckboxSelectMultiple
from multiselectfield import MultiSelectField

class JetCheckboxSelectMultiple(CheckboxSelectMultiple):
    option_template_name = "django/forms/widgets/checkbox_option.html"

@admin.register(Example)
class ExampleAdmin(admin.ModelAdmin):
    formfield_overrides = {
        MultiSelectField: {"widget": JetCheckboxSelectMultiple}
    }

<app>/templates/django/forms/widgets/checkbox_option.html

{% include "django/forms/widgets/input.html" %}
{% if widget.wrap_label %}<label class="vCheckboxLabel"{% if widget.attrs.id %} for="{{ widget.attrs.id }}"{% endif %}> {{ widget.label }}</label>{% endif %}