django change formfield data - django

Question

I am working with django-taggit (https://github.com/alex/django-taggit). To let a user add tags i use a formfield that I convert into the tags and add them.
However, when i try to load the template for editing. i get the taggit objects in my bar.
Now i want to convert those in a normal readable string again.
However, i can't seem to edit that field of the instance before passing it to my form.
The Form:
class NewCampaignForm(forms.ModelForm):
""" Create a new campaign and add the searchtags """
queryset = Game.objects.all().order_by("name")
game = forms.ModelChoiceField(queryset=queryset, required=True)
tags = forms.CharField(required=False)
focus = forms.ChoiceField(required=False, choices=Campaign.CHOICES)
class Meta:
model = Campaign
fields = ["game", "tags", "focus"]
exclude = ["owner"]
my model:
class Campaign(models.Model):
""" campaign information """
ROLEPLAY = "Roleplay"
COMBAT = "Combat"
BOTH = "Both"
CHOICES = (
(ROLEPLAY, "Roleplay"),
(COMBAT, "Combat"),
(BOTH, "Both"),
)
owner = models.ForeignKey(User)
game = models.ForeignKey(Game)
focus = models.CharField(max_length=15, choices=CHOICES)
tags = TaggableManager()
view:
def campaign_view(request, campaign_id):
campaign = get_object_or_404(Campaign, pk=campaign_id)
campaign.tags = "Some string"
new_campaign_form = NewCampaignForm(instance=campaign)
But when i try this i still get the taggit objects([]) in my inputfield instead of the "Some string"
How should i solve this

Answer 1

I am not sure how i overlooked this. But this works:
new_campaign_form = NewCampaignForm(instance=campaign, initial={"tags": "Some String"})
Excuse me, should have looked more and try better