Why are you creating two groups of tags ? Why not use a specific widgets
like a tree widget ?
On Monday, January 14, 2013 12:02:59 PM UTC+1, Sammael wrote:
>
> *The models*
>
> class TagGroup(models.Model):
> name = models.SlugField(max_length=50, unique=True, db_index=True)
>
> class Tag(models.Model):
> name = models.SlugField(max_length=50, unique=True, db_index=True)
> group = models.ForeignKey(TagGroup)
> def __unicode__(self):
> return self.name
>
> class Album(models.Model):
> name = models.CharField(max_length=64, blank=True)
> tags = models.ManyToManyField(Tag, blank=True)
>
> *The idea* is to have some groups of tags, for example, season (with the
> following tags: winter, summer, etc.) and place (with tags like Europe,
> America) for each album.
>
> *The problem* is I can't find a way to have a separate form for each
> group of tags in Django Admin.
>
> I've been reading docs for many hours trying to find the solution and here
> is where I come.
>
>
> *First approach*
>
> First of all I decided to create a separate form for tags:
>
> class AlbumAdminForm(forms.ModelForm):
> class Meta:
> model = Album
> tags = forms.ModelMultipleChoiceField(queryset=Tag.objects.all(),
> required=False, widget=FilteredSelectMultiple('tags', False ))
>
> class AlbumAdmin(admin.ModelAdmin):
> form = AlbumAdminForm
>
> It works good. Trying to add another form like this:
>
> class AlbumAdminForm(forms.ModelForm):
> class Meta:
> model = Album
> tags =
> forms.ModelMultipleChoiceField(queryset=Tag.objects.filter(group = 1),
> required=False, widget=FilteredSelectMultiple('tags', False ))
> tags_2 =
> forms.ModelMultipleChoiceField(queryset=Tag.objects.filter(group = 2),
> required=False, widget=FilteredSelectMultiple('tags', False ))
>
> In this case I see two forms in django admin with tags I can select, but
> can't save the contents of the second form because of it's property name
> 'tags_2' - django relies on this name. Unfortunately, I didn't find any way
> to make this form use Album.tags to save it's values.
>
> *Second approach*
>
> As far as I couldn't find the right way with AlbumAdminForm itself I
> decided to change html code it generates. First form looks like this:
>
> <select multiple="multiple" class="selectfilter" name="tags"
> id="id_tags">
> </select><script type="text/javascript">
> addEvent(window, "load", function(e) {SelectFilter.init("id_tags",
> "tags", 0, "/static/admin/"); });
> </script>
>
> I was trying to make the second one as similar as possible, but the only
> thing I could change is it's id:
>
>
> class AlbumAdminForm(forms.ModelForm):
> class Meta:
> model = Album
> tags =
> forms.ModelMultipleChoiceField(queryset=Tag.objects.filter(group = 1),
> required=False, widget=FilteredSelectMultiple('tags', False ))
> tags_2 =
> forms.ModelMultipleChoiceField(queryset=Tag.objects.filter(group = 2),
> required=False, widget=FilteredSelectMultiple('tags', False ))
> def __init__(self, *args, **kwargs):
> super(AlbumAdminForm, self).__init__(*args, **kwargs)
> self.fields['tags_2'].widget.attrs['id'] = 'id_tags'
>
> I couldn't change it's name or 'SelectFilter.init' call. Don't know if it
> would be any useful if I could. So, still no luck.
>
I think that it would be useful. maybe try widgets
attrs<https://docs.djangoproject.com/en/dev/topics/forms/modelforms/#overriding-the-default-field-types-or-widgets>
>
> *Third approach*
>
> Trying to use MultiWidget and MultiValueField:
>
> class My(object):
> def __init__(self, val1=EmptyQuerySet(), val2=EmptyQuerySet):
> self.val1=val1
> self.val2=val2
>
> class MyWidget(widgets.MultiWidget):
> def __init__(self, attrs=None):
> widget = (
> FilteredSelectMultiple('tags1', False),
> FilteredSelectMultiple('tags2', False)
> )
> super(MyWidget, self).__init__(widget, attrs=attrs)
> def decompress(self,value):
> if value:
> return value.val1 + value.val2
> return None
>
> class MyField(forms.MultiValueField):
> widget = MyWidget
> def __init__(self, required=True, widget=None, label=None,
> initial=None, help_text=None, queryset=None):
> field = (
> ModelMultipleChoiceField(queryset=queryset),
> ModelMultipleChoiceField(queryset=queryset)
> )
> super(MyField, self).__init__(fields=field, widget=widget,
> label=label, initial=initial, help_text=help_text)
>
> class AlbumAdminForm(forms.ModelForm):
> class Meta:
> model = Album
> tags = MyField(queryset=Tag.objects.all())
>
> In this case I have two forms but both are empty, I have nothing to
> choose. No luck =(
>
Are you sure you use the good parameter to pass the queryset to the
underlying Field
An hack that could probably work is the create a copy the tags field into a
tags_2 field in class model definition but it's kind of ugly ;)
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