I want to exclude those options from the ChoiceField in the forms that has
been already selected and are into the database. Below is the Code.
models.py
```
SEMESTER_CHOICES = (
("1", "1"),
("2", "2"),
("3", "3"),
("4", "4"),
("5", "5"),
("6", "6"),
("7", "7"),
("8", "8"),
)
class Publish(models.Model):
dates = models.CharField(max_length=255, choices = SEMESTER_CHOICES)
def __str__(self):
return self.dates
```
form.py
```
SEMESTER_CHOICES = (
("1", "1"),
("2", "2"),
("3", "3"),
("4", "4"),
("5", "5"),
("6", "6"),
("7", "7"),
("8", "8"),
)
class PublishForm(forms.ModelForm):
def __init__(self, **kwargs):
super(PublishForm, self).__init__(self, **kwargs)
selected_choices = [i.dates for i in Publish.objects.all()]
self.fields['dates'].choices = ({(k, v) for k, v in
SEMESTER_CHOICES
if k not in selected_choices})
class Meta:
model = Publish
fields = ['dates']
```
view.py
```
def add(request):
if request.method == 'POST':
form = PublishForm(request.POST)
if form.is_valid():
form.save()
return redirect('mainapp:add')
else:
form = PublishForm()
context = {
'form' : form
}
return render(request, 'mainapp/add.html', context)
```
What am I doing wrong? Ive followed these 2 links here. [link1][1] and
[link2][2]. Any suggestions please.
Also I am getting the error : **'PublishForm' object has no attribute
'get'**
Thank you
[1]:
https://stackoverflow.com/questions/27910922/django-form-exclude-options-in-select-field
[2]: https://stackoverflow.com/a/3665999/12280790
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