DJNAGO Many to Many field MultiSelect Into DropdownList

[Maryam Yousaf]

Hi,  

I have one manytomany field in one of my model which is currently coming as Multiselect but I need a dropdown where user can select multiple values as I have huge data to show.

I am trying this in forms.py but it is not showing dropdown field.

Kindly help me out.

Model.py:

class Chain(models.Model):
chain_id = models.AutoField(primary_key=True)
chain_name = models.CharField(max_length=255, unique=True)
chain_type = models.ForeignKey(ChainType, on_delete=models.CASCADE)
history = HistoricalRecords()

def __str__(self):
return self.chain_name

class Meta:
ordering = ('chain_name',)

class Brg(models.Model):
brg_campaign_id = models.AutoField(primary_key=True)
campaign_tracking = models.ForeignKey(CampaignTracking, on_delete=models.CASCADE)
brg_name = models.ForeignKey(Chain, on_delete=models.CASCADE, related_name="primary_brg",
help_text='Add Brgs/chain names for these above campaign has run')
brg_benchmark = models.ManyToManyField(Chain, related_name="competitor_brg", null=True,
blank=True, help_text='Add max.5 other benchmarks brgs to check overall impact')
history = HistoricalRecords()

def __str__(self):
return "Brg names list"

class Meta:
verbose_name = 'Brg Campaign Tracking'

forms.py:

class ChainForm(forms.ModelForm):
class Meta:
model: Chain
# fields = ('campaign_tracking', 'brg_name', 'brg_benchmark',)
widgets = {
'chain_name': Select(),
}

Regards,

maryam

[Sebastian Jung]

Hello,

then change in widgets Select() to SelectMultiple().

https://docs.djangoproject.com/en/3.2/ref/forms/widgets/#selectmultiple

Regards

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[Maryam Yousaf]

It is already selectmultiple . I need dropdown where I can select multiple values .

currently, it is coming like this:

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[Sebastian Jung]

When u use SelectMultiple then you get a select widget where you can select many options.... Your code are wrong in forms.py in widgets=....

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[Shaheed Haque]

On Mon, 18 Oct 2021 at 15:41, Sebastian Jung <sebasti...@gmail.com> wrote:

When u use SelectMultiple then you get a select widget where you can select many options.... Your code are wrong in forms.py in widgets=....

Am Mo., 18. Okt. 2021 um 16:22 Uhr schrieb 'Maryam Yousaf' via Django users <django...@googlegroups.com>:

It is already selectmultiple . I need dropdown where I can select multiple values .

currently, it is coming like this:

Apologies if this is stating the obvious, but to select more than one item, are you using "shift+click" or "ctrl+click" or just "click"?

You need to use the modifier key with "click", not just "click".

 

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[Maryam Yousaf]

It is not working with SelectMultiple. I can select multiple values but it is not showing any drop down.

On Mon, 18 Oct 2021 at 16:07, Sebastian Jung <sebasti...@gmail.com> wrote:

To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAKGT9mwXNTc2638qv-vScbHZW2uRq3utmu%2BbfM5Mz06WERmt2g%40mail.gmail.com.

[Sebastian Jung]

This is Admin Frontend this has nothing to do with normal Frontend. In Admin Frontend i have no experience...

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[danielp...@gmail.com]

you can use django-ajax-selects library

https://github.com/crucialfelix/django-ajax-selects/

Define a lookup channel:

yourapp/lookups.py

from ajax_select import register, LookupChannel 

from .models import Tag 

@register('tags') 

class TagsLookup(LookupChannel): 

    model = Tag 

    def get_query(self, q, request): 

          return self.model.objects.filter(name__icontains=q).order_by('name')[:50] 

  def format_item_display(self, item): 

          return u"<span class='tag'>%s</span>" % item.name

Add field to a form:

yourapp/forms.py

from ajax_select.fields import AutoCompleteSelectMultipleField 

class DocumentForm(ModelForm): 

       class Meta: 

           model = Document 

           tags = AutoCompleteSelectMultipleField('tags')