Created
March 28, 2013 13:56
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A modification of Django's admin widget RelatedFieldWidgetWrapper, which adds the handy + to select boxes when picking a related model. This one doesn't assume the user's picking a related model instance--it simply lets the user pick a model instance or add a new one if needed. This is useful on forms (such as the example in forms.py) where you …
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""" | |
An example form using AddAnotherWidgetWrapper. | |
""" | |
from django import forms | |
from .models import Owner | |
from .widgets import AddAnotherWidgetWrapper | |
class PickOwnerForm(forms.Form): | |
owner = forms.ModelChoiceField( | |
queryset=Owner.objects.all().order_by('name'), | |
widget=AddAnotherWidgetWrapper( | |
forms.Select(), | |
Owner, | |
) | |
) |
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{% extends "admin/base_site.html" %} | |
{% comment %} | |
An example template that renders a form where an AddAnotherWidgetWrapper is present. | |
{% endcomment %} | |
{% load i18n admin_static admin_modify %} | |
{% load admin_urls %} | |
{% block extrahead %} | |
{{ block.super }} | |
<script src="{{ STATIC_URL }}admin/js/admin/RelatedObjectLookups.js"></script> | |
{% block bodyclass %}change-list{% endblock %} | |
{% block content %} | |
<div> | |
Pick an owner or add a new one: | |
</div> | |
{{ form.media }} | |
<form method="post"> | |
{% csrf_token %} | |
{{ form.as_p }} | |
<input type="submit" value="{% trans "Picked" %}" /> | |
</form> | |
{% endblock %} |
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import copy | |
from django import forms | |
from django.contrib.admin.templatetags.admin_static import static | |
from django.core.urlresolvers import reverse | |
from django.utils.safestring import mark_safe | |
from django.utils.translation import ugettext as _ | |
class AddAnotherWidgetWrapper(forms.Widget): | |
""" | |
This class is a wrapper to a given widget to add the add icon for the | |
admin interface. Modeled after | |
django.contrib.admin.widgets.RelatedFieldWidgetWrapper | |
""" | |
def __init__(self, widget, model): | |
self.is_hidden = widget.is_hidden | |
self.needs_multipart_form = widget.needs_multipart_form | |
self.attrs = widget.attrs | |
self.choices = widget.choices | |
self.widget = widget | |
self.model = model | |
def __deepcopy__(self, memo): | |
obj = copy.copy(self) | |
obj.widget = copy.deepcopy(self.widget, memo) | |
obj.attrs = self.widget.attrs | |
memo[id(self)] = obj | |
return obj | |
@property | |
def media(self): | |
return self.widget.media | |
def render(self, name, value, *args, **kwargs): | |
model = self.model | |
info = (model._meta.app_label, model._meta.object_name.lower()) | |
self.widget.choices = self.choices | |
output = [self.widget.render(name, value, *args, **kwargs)] | |
related_url = reverse('admin:%s_%s_add' % info) | |
output.append(('<a href="%s" class="add-another" id="add_id_%s" ' + | |
'onclick="return showAddAnotherPopup(this);"> ') | |
% (related_url, name)) | |
output.append('<img src="%s" width="10" height="10" alt="%s"/></a>' | |
% (static('admin/img/icon_addlink.gif'), | |
_('Add Another'))) | |
return mark_safe(''.join(output)) | |
def build_attrs(self, extra_attrs=None, **kwargs): | |
"Helper function for building an attribute dictionary." | |
self.attrs = self.widget.build_attrs(extra_attrs=None, **kwargs) | |
return self.attrs | |
def value_from_datadict(self, data, files, name): | |
return self.widget.value_from_datadict(data, files, name) | |
def _has_changed(self, initial, data): | |
return self.widget._has_changed(initial, data) | |
def id_for_label(self, id_): | |
return self.widget.id_for_label(id_) |
Hi, how to retain the data I put in parent form after submitting child form? My child form replace the parent form so the value is disappear.
Hi, I want to use ForeignKeyRawIdWidget with my custom model, due to pop-up window.
class PickForm(forms.Form):
_selected_action = forms.CharField(widget=forms.MultipleHiddenInput)
my_id = forms.ModelChoiceField(
MyModel.objects.all(),
widget=ForeignKeyRawIdWidget(
rel=ManyToOneRel('self', admin.site),
admin_site=admin.site
)
)
We are still using LTS django 1.4 and nothing but the plain input is displayed. There is no icon for selecting the choice that I want.
Have you got any suggestions?
@niorko did you manage to solve your problem ?
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Great, work in django 1.6 is well.