Initially posted on stack overflow:
https://stackoverflow.com/questions/59395761/passing-dynamic-choices-into-a-formset-unique-for-each-form
I am working on what I thought was a simple college football confidence
pool. The concept is as follows:
- Bowl Model: Model that stores information of each bowl game being
played this season
- Team Model: Model for all the teams playing in a bowl with a foreign
key to the bowl
models.py
from django.db import models
from django.contrib.auth.models import Group, User
class Bowl(models.Model):
"""Model for Bowl Game information"""
name = models.CharField(max_length=200)
b_date = models.DateField(null=True, blank=True)
b_time = models.TimeField(null=True, blank=True)
tv = models.CharField(max_length=10)
location = models.CharField(max_length=200)
def __str__(self):
"""String for representing the bowl object"""
return self.name
class Team(models.Model):
name = models.CharField(max_length=200)
bowl = models.ForeignKey(Bowl,on_delete=models.SET_NULL,null=True)
def __str__(self):
"""String for representing the intermediate table"""
return self.name
I'm attempting to create a page has a formset which allows the user to pick
the predicted winner of each game. Therefore I constructed the following
view to call the form and formset.
views.py
def fs_test(request):
bowl_list = Bowl.objects.all()
bowl_len = len(bowl_list)
bowl_data = []
TestFormSet = formset_factory(TestForm, extra=0)
for bowl in bowl_list:
bowl_data.append({
't_bowl': bowl.name,'t_user':request.user,'t_weight':1,
't_winner':winner_data,
})
if request.method == 'POST':
pass
else:
formset = TestFormSet(initial=bowl_data)
context = {
'formset':formset, 'bowl_data':bowl_data
}
return render(request, 'catalog/test_bowl.html',context)
The following form inherits pre-populated data via passing "bowl_data" in
the "initial" parameter.
forms.py
class TestForm(forms.Form):
def __init__(self, *args, **kwargs):
super(TestForm, self).__init__(*args, **kwargs)
self.fields['t_bowl'] = forms.CharField()
self.fields['t_weight'] = forms.IntegerField()
self.fields['t_user'] = forms.CharField()
self.fields['t_winner'] = forms.ChoiceField(
widget=forms.RadioSelect,
required=True,
choices=[(o.name, o.name)
for o in Team.objects.filter(bowl__name__exact=self.t_bowl)]
)
I believe pre-populating the t_winner choices are failing because using the
self.t_bowl in the query is just a field reference not the name of the
field. I don't know how to pass in the "bowl" name to the form query. Or
maybe I pre-populate the "choices" in the view but I don't know how to pass
a dict into it and reference the correct index.
I've done some reading on the get_form_kwargs, but I'm not clear on how to
use it in this instance.
It's entirely possible I'm using the wrong data model for this task,
however I've been stumped for a couple of day on this. It took me a while
to even figure out how to pass in unique "initial" values for each form in
the formset.
Any recommendations would save what little hair I have left. Thank you!
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