newtagging/admin.py

   1 # -*- coding: utf-8 -*-
   2 from django.contrib import admin
   3 from django import forms
   4 from django.utils.safestring import mark_safe
   5 from django.utils.translation import ugettext_lazy as _
   6
   7
   8 class FilteredSelectMultiple(forms.SelectMultiple):
   9     """
  10     A SelectMultiple with a JavaScript filter interface.
  11
  12     Note that the resulting JavaScript assumes that the SelectFilter2.js
  13     library and its dependencies have been loaded in the HTML page.
  14     """
  15     def _media(self):
  16         from django.conf import settings
  17         js = ['js/SelectBox.js' , 'js/SelectFilter2.js']
  18         return forms.Media(js=['%s%s' % (settings.ADMIN_MEDIA_PREFIX, url) for url in js])
  19     media = property(_media)
  20
  21     def __init__(self, verbose_name, is_stacked, attrs=None, choices=()):
  22         self.verbose_name = verbose_name
  23         self.is_stacked = is_stacked
  24         super(FilteredSelectMultiple, self).__init__(attrs, choices)
  25
  26     def render(self, name, value, attrs=None, choices=()):
  27         from django.conf import settings
  28         output = [super(FilteredSelectMultiple, self).render(name, value, attrs, choices)]
  29         output.append(u'<script type="text/javascript">addEvent(window, "load", function(e) {')
  30         # TODO: "id_" is hard-coded here. This should instead use the correct
  31         # API to determine the ID dynamically.
  32         output.append(u'SelectFilter.init("id_%s", "%s", %s, "%s"); });</script>\n' % \
  33             (name, self.verbose_name.replace('"', '\\"'), int(self.is_stacked), settings.ADMIN_MEDIA_PREFIX))
  34         return mark_safe(u''.join(output))
  35
  36
  37 class TaggableModelForm(forms.ModelForm):
  38     tags = forms.MultipleChoiceField(label=_('tags').capitalize(), required=True, widget=FilteredSelectMultiple(_('tags'), False))
  39
  40     def __init__(self, *args, **kwargs):
  41         self.tags.choices = [(tag.id, tag.name) for tag in self.tag_model.objects.all()]
  42         if 'instance' in kwargs:
  43             if 'initial' not in kwargs:
  44                 kwargs['initial'] = {}
  45             kwargs['initial']['tags'] = [tag.id for tag in self.tag_model.objects.get_for_object(kwargs['instance'])]
  46         super(TaggableModelForm, self).__init__(*args, **kwargs)
  47
  48     def save(self, commit):
  49         obj = super(TaggableModelForm, self).save()
  50         tag_ids = self.cleaned_data['tags']
  51         tags = self.tag_model.objects.filter(pk__in=tag_ids)
  52         self.tag_model.objects.update_tags(obj, tags)
  53         return obj
  54
  55     def save_m2m(self):
  56         # TODO: Shouldn't be needed
  57         pass
  58
  59
  60 class TaggableModelAdmin(admin.ModelAdmin):
  61     form = TaggableModelForm
  62
  63     def get_form(self, request, obj=None):
  64         form = super(TaggableModelAdmin, self).get_form(request, obj)
  65         form.tag_model = self.tag_model
  66         return form
  67