Model Formset - by default the formet model is one additional field (2 fields in total)
My model form, which doesn't even define "additional" parameters in modelformset_factory, is one additional field in the template. I tried many options but it didn't work. If I print the form (model form) on the command line, it just prints one form field as needed, but on the sample model it prints 2 by default.
Here is my code.
models.py
class Direction(models.Model):
text = models.TextField(blank=True, verbose_name='Direction|text')
forms.py
class DirectionForm(forms.ModelForm):
class Meta:
model = Direction
fields = ['text',]
views.py
def myview(request):
Dirset = modelformset_factory(Direction, form=DirectionForm)
if request.method == "POST":
dir_formset = Dirset(request.POST or None)
if dir_formset.is_valid():
for direction in dir_formset:
text = direction.cleaned_data.get('text')
Direction.objects.create(text=text)
return render(request, "test/test.html", {'DirFormSet':Dirset})
template
{% block content %}
<form method="POST">{% csrf_token %}
<div id="forms">
{{DirFormSet.management_form}}
{% for form in DirFormSet %}
{{form.text}}
{% if error in form.text.errors %}
{{error|escape}
{% endif %}
{% endfor %}
</div>
<button id="add-another">add another</button>
<input type="submit" />
</form>
{% endblock %}
As a side note, if I submit data to this form, it gives the following error. Mistake
Exception Type: MultiValueDictKeyError
Exception Value:"u'form-0-id'"
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modelformset_factory
Creates one additional form by default . If you don't want any additional forms, install extra=0
.
Dirset = modelformset_factory(Direction, form=DirectionForm, extra=0)
KeyError
is that you have not included the field template in the form id
. You should have something like:
{% for form in dir_formset %}
{{ form.id }}
{{ form.text }}
...
{% endfor %}
Note that when rendering the template, not the class, DirFormSet
you should pass in an instance of the form dir_formset
. Your opinion should look something like this:
return render(request, "test/test.html", {'dir_formset': dir_formset})
then the template must be updated to use dir_formset
instead DirFormSet
.
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