Django select2, show subcategories when parent category name searched

Question

I used django-select2 to show parent categories and sub categories. When I search the name of parent category using 'Select2MultipleWidget' (Pacific Time Zone, for example), it does not show its sub categories. Is it possible to show belonging sub categories when parent categories are searched?

I was reading select2 documentation but I couldn't find relevant options.

#models.py
class Category(models.Model):
name = models.CharField(max_length=200)

class SubCategory(models.Model):
    category = models.ForeignKey(Category, on_delete=models.CASCADE)
    name = models.CharField(max_length=180)

class Post(models.Model):
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="user")
    title = models.CharField(max_length=200)
    category = models.ManyToManyField(SubCategory)
    desc = models.TextField()

#forms.py
class PostForm(forms.ModelForm):
def categories_as_choices():
    categories = []
    for category in Category.objects.all():
        new_category = []
        sub_categories = []
        for sub_category in category.subcategory_set.all():
            sub_categories.append([sub_category.id, sub_category.name])

        new_category = [category.name, sub_categories]
        categories.append(new_category)

    return categories

category = forms.ChoiceField(
    choices=categories_as_choices(),
    widget = Select2MultipleWidget(
        attrs={'class': 'form-control col-4'}
        ),
)

    class Meta:
    model = Post
    fields = ['title', 'desc', 'category']

I tried to use select2's example of timezone and state name (Pacific Time Zone as a parent category with California as a sub category). When I type 'Pacific Time Zone', it won't show 'California', sub category.

I decided to go with Chosen.js which provides such appearance. — user3422616, Oct 14 '19 at 09:57
also found an answer, https://stackoverflow.com/questions/21992727/display-result-matching-optgroup-using-select2 — user3422616, Oct 14 '19 at 14:26

score 0 · Answer 1 · answered Oct 13 '19 at 08:07

0

i think you must set this def :def__str__(self): ... return self.any_thing_you_want_to_show in you modelsclass

answered Oct 13 '19 at 08:07

danial hadi

54
5

I actually added 'return self.name' but belonging subcategories don't show when I type parent category name. – user3422616 Oct 13 '19 at 08:12
are you use it in 'class Category(models.Model): name = models.CharField(max_length=200)' – danial hadi Oct 13 '19 at 08:23

score 0 · Answer 2 · answered Apr 10 '20 at 08:55

0

class Category( models.Model ):
Title    = models.CharField( max_length=255, blank=True, null=Falsex) 
Catparents = models.ForeignKey('self',limit_choices_to = {'Catparents__isnull': True}, on_delete=models.CASCADE,related_name="parents", default=1, blank=True, null=True)

answered Apr 10 '20 at 08:55

x-king

1

2

Please don't post only code as an answer, but also provide an explanation what your code does and how it solves the problem of the question. Answers with an explanation are usually of higher quality, and are more likely to attract upvotes. – Mark Rotteveel Apr 10 '20 at 18:13

Django select2, show subcategories when parent category name searched

2 Answers2