Fixed #7007: Added Deprecation warning for coreapi

rest_framework/__init__.py

@@ -31,3 +31,7 @@ if django.VERSION < (3, 2):
 
 class RemovedInDRF315Warning(DeprecationWarning):
     pass
+
+
+class RemovedInDRF317Warning(DeprecationWarning):
+    pass

rest_framework/filters.py

@@ -3,6 +3,7 @@ Provides generic filtering backends that can be used to filter the results
 returned by list views.
 """
 import operator
+import warnings
 from functools import reduce
 
 from django.core.exceptions import ImproperlyConfigured
@@ -12,6 +13,7 @@ from django.template import loader
 from django.utils.encoding import force_str
 from django.utils.translation import gettext_lazy as _
 
+from rest_framework import RemovedInDRF317Warning
 from rest_framework.compat import coreapi, coreschema, distinct
 from rest_framework.settings import api_settings
 
@@ -29,6 +31,8 @@ class BaseFilterBackend:
 
     def get_schema_fields(self, view):
         assert coreapi is not None, 'coreapi must be installed to use `get_schema_fields()`'
+        if coreapi is not None:
+            warnings.warn('CoreAPI compatibility is deprecated and will be removed in DRF 3.17', RemovedInDRF317Warning)
         assert coreschema is not None, 'coreschema must be installed to use `get_schema_fields()`'
         return []
 
@@ -146,6 +150,8 @@ class SearchFilter(BaseFilterBackend):
 
     def get_schema_fields(self, view):
         assert coreapi is not None, 'coreapi must be installed to use `get_schema_fields()`'
+        if coreapi is not None:
+            warnings.warn('CoreAPI compatibility is deprecated and will be removed in DRF 3.17', RemovedInDRF317Warning)
         assert coreschema is not None, 'coreschema must be installed to use `get_schema_fields()`'
         return [
             coreapi.Field(
@@ -306,6 +312,8 @@ class OrderingFilter(BaseFilterBackend):
 
     def get_schema_fields(self, view):
         assert coreapi is not None, 'coreapi must be installed to use `get_schema_fields()`'
+        if coreapi is not None:
+            warnings.warn('CoreAPI compatibility is deprecated and will be removed in DRF 3.17', RemovedInDRF317Warning)
         assert coreschema is not None, 'coreschema must be installed to use `get_schema_fields()`'
         return [
             coreapi.Field(

rest_framework/pagination.py

@@ -4,6 +4,7 @@ be used for paginated responses.
 """
 
 import contextlib
+import warnings
 from base64 import b64decode, b64encode
 from collections import namedtuple
 from urllib import parse
@@ -15,6 +16,7 @@ from django.template import loader
 from django.utils.encoding import force_str
 from django.utils.translation import gettext_lazy as _
 
+from rest_framework import RemovedInDRF317Warning
 from rest_framework.compat import coreapi, coreschema
 from rest_framework.exceptions import NotFound
 from rest_framework.response import Response
@@ -152,6 +154,8 @@ class BasePagination:
 
     def get_schema_fields(self, view):
         assert coreapi is not None, 'coreapi must be installed to use `get_schema_fields()`'
+        if coreapi is not None:
+            warnings.warn('CoreAPI compatibility is deprecated and will be removed in DRF 3.17', RemovedInDRF317Warning)
         return []
 
     def get_schema_operation_parameters(self, view):
@@ -311,6 +315,8 @@ class PageNumberPagination(BasePagination):
 
     def get_schema_fields(self, view):
         assert coreapi is not None, 'coreapi must be installed to use `get_schema_fields()`'
+        if coreapi is not None:
+            warnings.warn('CoreAPI compatibility is deprecated and will be removed in DRF 3.17', RemovedInDRF317Warning)
         assert coreschema is not None, 'coreschema must be installed to use `get_schema_fields()`'
         fields = [
             coreapi.Field(
@@ -525,6 +531,8 @@ class LimitOffsetPagination(BasePagination):
 
     def get_schema_fields(self, view):
         assert coreapi is not None, 'coreapi must be installed to use `get_schema_fields()`'
+        if coreapi is not None:
+            warnings.warn('CoreAPI compatibility is deprecated and will be removed in DRF 3.17', RemovedInDRF317Warning)
         assert coreschema is not None, 'coreschema must be installed to use `get_schema_fields()`'
         return [
             coreapi.Field(
@@ -930,6 +938,8 @@ class CursorPagination(BasePagination):
 
     def get_schema_fields(self, view):
         assert coreapi is not None, 'coreapi must be installed to use `get_schema_fields()`'
+        if coreapi is not None:
+            warnings.warn('CoreAPI compatibility is deprecated and will be removed in DRF 3.17', RemovedInDRF317Warning)
         assert coreschema is not None, 'coreschema must be installed to use `get_schema_fields()`'
         fields = [
             coreapi.Field(

rest_framework/schemas/coreapi.py

@@ -5,7 +5,7 @@ from urllib import parse
 from django.db import models
 from django.utils.encoding import force_str
 
-from rest_framework import exceptions, serializers
+from rest_framework import RemovedInDRF317Warning, exceptions, serializers
 from rest_framework.compat import coreapi, coreschema, uritemplate
 from rest_framework.settings import api_settings
 
@@ -118,6 +118,8 @@ class SchemaGenerator(BaseSchemaGenerator):
 
     def __init__(self, title=None, url=None, description=None, patterns=None, urlconf=None, version=None):
         assert coreapi, '`coreapi` must be installed for schema support.'
+        if coreapi is not None:
+            warnings.warn('CoreAPI compatibility is deprecated and will be removed in DRF 3.17', RemovedInDRF317Warning)
         assert coreschema, '`coreschema` must be installed for schema support.'
 
         super().__init__(title, url, description, patterns, urlconf)

setup.cfg

@@ -3,6 +3,8 @@ license_files = LICENSE.md
 
 [tool:pytest]
 addopts=--tb=short --strict-markers -ra
+testspath = tests
+filterwarnings = ignore:CoreAPI compatibility is deprecated*:rest_framework.RemovedInDRF317Warning
 
 [flake8]
 ignore = E501,W503,W504

tests/schemas/test_coreapi.py

@@ -7,10 +7,18 @@ from django.test import TestCase, override_settings
 from django.urls import include, path
 
 from rest_framework import (
-    filters, generics, pagination, permissions, serializers
+    RemovedInDRF317Warning, filters, generics, pagination, permissions,
+    serializers
 )
 from rest_framework.compat import coreapi, coreschema
 from rest_framework.decorators import action, api_view, schema
+from rest_framework.filters import (
+    BaseFilterBackend, OrderingFilter, SearchFilter
+)
+from rest_framework.pagination import (
+    BasePagination, CursorPagination, LimitOffsetPagination,
+    PageNumberPagination
+)
 from rest_framework.request import Request
 from rest_framework.routers import DefaultRouter, SimpleRouter
 from rest_framework.schemas import (
@@ -1433,3 +1441,38 @@ def test_schema_handles_exception():
     response.render()
     assert response.status_code == 403
     assert b"You do not have permission to perform this action." in response.content
+
+
+class CoreapiDeprecationTestCase(TestCase):
+    def assert_deprecation_warning(self, obj):
+        with pytest.warns(RemovedInDRF317Warning) as warning_list:
+            obj.get_schema_fields({})
+            assert len(warning_list) == 1
+            assert str(warning_list[0].message) == "CoreAPI compatibility is deprecated and will be removed in DRF 3.17"
+
+    def test_filter_backend_deprecation_warning(self):
+        filter_backends = [
+            SearchFilter(),
+            BaseFilterBackend(),
+            OrderingFilter(),
+        ]
+
+        for obj in filter_backends:
+            self.assert_deprecation_warning(obj)
+
+    def test_pagination_deprecation_warning(self):
+        pagination_classes = [
+            BasePagination(),
+            PageNumberPagination(),
+            LimitOffsetPagination(),
+            CursorPagination(),
+        ]
+
+        for obj in pagination_classes:
+            self.assert_deprecation_warning(obj)
+
+    def test_schema_generator_deprecation_warning(self):
+        with pytest.warns(RemovedInDRF317Warning) as warning_list:
+            SchemaGenerator()
+            assert len(warning_list) == 1
+            assert str(warning_list[0].message) == "CoreAPI compatibility is deprecated and will be removed in DRF 3.17"