Управление тегом с помощью django-select2

Applegrew делает новый релиз, в котором реализовано управление тегами с созданным тегом, если он не существует в таблице. Поэтому используйте AutoModelSelect2TagField:

from django_select2 import AutoModelSelect2TagField


class TagChoices(AutoModelSelect2TagField):
    queryset = Tag.objects
    search_fields = ['name__icontains']

    def get_model_field_values(self, value):
        return {'name': value }


class SimpleForm(forms.ModelForm):
    tags = TagChoices(required=False)

Вот небольшой пример использования.

Это то, что сработало для меня с django-select2==7.1.1

#models.py

from django.db import models


class Tag(models.Model):
    name = models.CharField(('Name'), max_length=255, unique=True)

    def __str__(self):
        return self.name


class Article(models.Model):
    title = models.CharField(max_length=255)
    tags = models.ManyToManyField('Tag', blank=True)

#forms.py

from django_select2.forms import ModelSelect2TagWidget


class ArticleTagSelect2TagWidget(ModelSelect2TagWidget):
"""
Widget class for auto populate, edit & add tags.
"""
queryset = Tag.objects.all()
search_fields = ('name__icontains',)

@property
def empty_label(self):
    return 'Type in tags'

def value_from_datadict(self, data, files, name):
    '''Create objects for given non-pimary-key values. Return list of all names as name is the to_field_name.'''
    values = set(super().value_from_datadict(data, files, name))
    # This may only work for Tag, if Tag has title field.
    # You need to implement this method yourself, to ensure proper object creation.
    names = self.queryset.filter(**{'name__in': list(values)}).values_list('name', flat=True)
    cleaned_values = list(names)
    for val in values - set(list(names)):
        cleaned_values.append(self.queryset.create(name=val).name)
    return cleaned_values

class AddArticleForm(forms.ModelForm):
    tags = forms.ModelMultipleChoiceField(queryset=Tag.objects.all(),
    widget=ArticleTagSelect2TagWidget(data_view='dashboard:auto-json'),
    required=False, to_field_name='name',)

    class Meta:
        model = Article

#views.py AutoResponseView переопределен для создания возвращаемого имени ajax вместо идентификатора.

from django_select2.views import AutoResponseView


   class TagAutoResponseView(AutoResponseView):

    def get(self, request, *args, **kwargs):
        """
        This method is overriden for changing id to name instead of pk.
        """
        self.widget = self.get_widget_or_404()
        self.term = kwargs.get('term', request.GET.get('term', ''))
        self.object_list = self.get_queryset()
        context = self.get_context_data()
        return JsonResponse({
            'results': [
                {
                    'text': self.widget.label_from_instance(obj),
                    'id': obj.name,
                }
                for obj in context['object_list']
                ],
            'more': context['page_obj'].has_next()
        })