django-rest-swagger: How can I specify the parameter type in the docstring

Define a filter-class in your viewset. django-rest does not do this yaml stuff for parameters anymore. The fields you define in your filterclass will appear as fields in your openapi / swagger documentation. This is very neat.

READ full documentation.

http://www.django-rest-framework.org/apiguide/filtering/#djangofilterbackend

from django_filters.rest_framework.filterset import FilterSet

class ProductFilter(FilterSet):

    class Meta(object):
        models = models.Product
        fields = (
            'name', 'category', 'id', )


class PurchasedProductsList(generics.ListAPIView):
    """
    Return a list of all the products that the authenticated
    user has ever purchased, with optional filtering.
    """
    model = Product
    serializer_class = ProductSerializer
    filter_class = ProductFilter

    def get_queryset(self):
        user = self.request.user
        return user.purchase_set.all()

the fields defined in the filterseet will show up in de documentation. but there will be no description.

Similar to John VanBuskirk's answer, here is what I have:

The actual manual created doc:

drf_api/business/schema.py

# encoding: utf-8
from __future__ import unicode_literals
from __future__ import absolute_import
import coreapi

schema = coreapi.Document(
    title='Business Search API',
    url='/api/v3/business/',
    content={
        'search': coreapi.Link(
            url='/',
            action='get',
            fields=[
                coreapi.Field(
                    name='what',
                    required=True,
                    location='query',
                    description='Search term'
                ),
                coreapi.Field(
                    name='where',
                    required=True,
                    location='query',
                    description='Search location'
                ),
            ],
            description='Search business listings'
        )
    }
)

Then copied the get_swagger_view function and customized it:

drf_api/swagger.py

# encoding: utf-8
from __future__ import unicode_literals
from __future__ import absolute_import
from rest_framework import exceptions
from rest_framework.permissions import AllowAny
from rest_framework.renderers import CoreJSONRenderer
from rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework_swagger import renderers
from django.utils.module_loading import import_string


def get_swagger_view(schema_location):
    """
    Returns schema view which renders Swagger/OpenAPI.
    """
    class SwaggerSchemaView(APIView):
        _ignore_model_permissions = True
        exclude_from_schema = True
        permission_classes = [AllowAny]
        renderer_classes = [
            CoreJSONRenderer,
            renderers.OpenAPIRenderer,
            renderers.SwaggerUIRenderer
        ]

        def get(self, request):
            schema = None

            try:
                schema = import_string(schema_location)
            except:
                pass

            if not schema:
                raise exceptions.ValidationError(
                    'The schema generator did not return a schema Document'
                )

            return Response(schema)


    return SwaggerSchemaView.as_view()

Then hook it up to the urls.py

from ..swagger import get_swagger_view
from . import views

schema_view = get_swagger_view(schema_location='drf_api.business.schema.schema')

urlpatterns = [
    url(r'^swagger/$', schema_view),

The only way I've had success in defining parameter types is by creating a view that defines what I want without using the generator.

class SwaggerSchemaView(APIView):
permission_classes = [IsAuthenticatedOrReadOnly,]
renderer_classes = [renderers.OpenAPIRenderer, renderers.SwaggerUIRenderer]

schema = coreapi.Document(
    title='Thingy API thing',
        'range': coreapi.Link(
            url='/range/{start}/{end}',
            action='get',
            fields=[
                coreapi.Field(
                    name='start',
                    required=True,
                    location='path',
                    description='start time as an epoch',
                    type='integer'
                ),
                coreapi.Field(
                    name='end',
                    required=True,
                    location='path',
                    description='end time as an epoch',
                    type='integer'
                )
            ],
            description='show the things between the things'
        ),
    }
)

and then using that class in urls.py

urlpatterns = [
    url(r'^$', SwaggerSchemaView.as_view()),
    ...
]

For latest django-rest-framework > 3.7 and django-rest-swagger > 2 , go through the below link to find working solution

https://github.com/marcgibbons/django-rest-swagger/issues/549#issuecomment-371860030

For Django Rest Framework >= 2.0

I am using a serializer and apply to a the view function with a decorator:

from types import MethodType
from typing import Optional, List, Callable, Any

from rest_framework.decorators import api_view as drf_api_view
from rest_framework.serializers import BaseSerializer

Function = Callable[..., Any]


def api_view(
    http_method_names: Optional[List[str]] = None,
    use_serializer: Optional[BaseSerializer] = None
) -> Function:
    if use_serializer is None:
        return drf_api_view(http_method_names)

    def api_view_deco_wrap(view: Function) -> Function:
        nonlocal http_method_names, use_serializer

        decorated_view = drf_api_view(http_method_names)(view)

        if use_serializer:
            decorated_view.cls.get_serializer = \
                MethodType(lambda s: use_serializer(), decorated_view.cls)

        return decorated_view

    return api_view_deco_wrap

Then in the function I use:

@util.api_view(["POST"], use_serializer=serializers.MySerializer)
def replace(request, pk):
    pass

And works!!!

[enter image description here][1]For me it worked with the ManualSchema. You have to define the description and fields. See:

from rest_framework import views
import coreapi
import coreschema
from rest_framework.schemas import ManualSchema

class RegisterView(views.APIView):

    schema = ManualSchema(
        description="User register endpoint.",
        fields=[
            coreapi.Field(
                'username',
                required=True,
                location='path',
                description='A unique username',
                schema=coreschema.String(),
                ),
            coreapi.Field(
                'password',
                required=True,
                location='path',
                schema=coreschema.String(),
                ),
            ]
        )

    )
    ...