Is there a converter between django.forms.Form and rest_framework.serializers? - django

Question

I already have plenty of forms defined in my django 1.9 project. Now I need to export them as REST (DRF 3.5.3) as well.
With just a bit of hacking, I was able to provide GET and PUT methods. But I also need to provide the OPTIONS method and I can't seem to find anything that would help me do that.
So, is there something that would convert an instanced form to DRF Serializer / ViewSet?

Answer 1

No but you can do the other way around as explained in http://www.django-rest-framework.org/topics/html-and-forms/#rendering-forms.

Answer 2

drf-braces can do this.
from django import forms
from drf_braces.serializers.form_serializer import FormSerializer
class MyForm(forms.Form):
foo = forms.CharField(max_length=32)
bar = forms.DateTimeField()
class MySerializer(FormSerializer):
class Meta(object):
form = MyForm
https://github.com/dealertrack/django-rest-framework-braces/blob/master/docs/overview.rst

Answer 3

I didn't want to mess with all of my custom logic in the forms, so I just added an as_options method:
class APIViewForm(Form):
def as_dict(self):
return {fld.auto_id: self.initial.get(fld.name, None) for fld in self}
def as_options(self):
flds = {}
for fld in self:
flds[fld.name] = f = {}
fld = fld.field
f.update(dict(
required=fld.required,
read_only=fld.disabled,
label=fld.label,
))
if isinstance(fld, (CharField, URLField)):
f['type'] = 'field'
if fld.max_length:
f['max_length'] = fld.max_length
if fld.min_length:
f['min_length'] = fld.min_length
elif isinstance(fld, IntegerField):
f['type'] = 'integer'
if fld.max_value:
f['max_value'] = fld.max_value
if fld.min_value:
f['min_value'] = fld.min_value
elif isinstance(fld, ChoiceField):
f['type'] = 'choice'
f['choices'] = [dict(value=c[0], display_name=c[1]) for c in fld.choices]
elif isinstance(fld, DateTimeField):
f['type'] = 'datetime'
return dict(
name=self.__class__.__qualname__,
description='',
renders=['application/json'],
parses=['application/json'],
actions=dict(PUT=flds)
)
It seems to do the trick