Fix lookup_value_regex handling of non string types

drf_spectacular/openapi.py

@@ -496,7 +496,7 @@ def _resolve_path_parameters(self, variables):
             resolved_parameter = resolve_django_path_parameter(
                 self.path_regex, variable, self.map_renderers('format'),
             )
-            if not resolved_parameter:
+            if not resolved_parameter and model is None:
                 resolved_parameter = resolve_regex_path_parameter(self.path_regex, variable)
 
             if resolved_parameter:
@@ -519,6 +519,10 @@ def _resolve_path_parameters(self, variables):
                         model_field_name = variable
                     model_field = follow_model_field_lookup(model, model_field_name)
                     schema = self._map_model_field(model_field, direction=None)
+                    if 'type' in schema and schema['type'] == 'string':
+                        regex_resolved_parameter = resolve_regex_path_parameter(self.path_regex, variable)
+                        if regex_resolved_parameter:
+                            schema = regex_resolved_parameter['schema']
                     if 'description' not in schema and model_field.primary_key:
                         description = get_pk_description(model, model_field)
                 except django_exceptions.FieldError:

tests/contrib/test_drf_lookup_value.py

@@ -0,0 +1,38 @@
+import pytest
+from django.db import models
+from django.urls import include, re_path
+from rest_framework import serializers, viewsets
+from rest_framework.routers import SimpleRouter
+
+from tests import assert_schema, generate_schema
+
+
+class Book(models.Model):
+    id = models.IntegerField(primary_key=True)
+    name = models.CharField(max_length=255)
+
+class BookSerializer(serializers.HyperlinkedModelSerializer):
+    class Meta:
+        model = Book
+        fields = ('name',)
+
+def _generate_simple_router_schema(viewset):
+    router = SimpleRouter()
+    router.register('books', viewset, basename='books')
+    urlpatterns = [
+        re_path('', include(router.urls)),
+    ]
+    return generate_schema(None, patterns=urlpatterns)
+
+@pytest.mark.contrib('rest_framework_lookup_value')
+def test_drf_lookup_value_regex_integer(no_warnings):
+    class BookViewSet(viewsets.ModelViewSet):
+        queryset = Book.objects.all()
+        serializer_class = BookSerializer
+        lookup_field = 'id'
+        lookup_value_regex = r'\d+'
+
+    assert_schema(
+        _generate_simple_router_schema(BookViewSet),
+        'tests/contrib/test_drf_lookup_value.yml',
+    )

tests/contrib/test_drf_lookup_value.yml

@@ -0,0 +1,194 @@
+openapi: 3.0.3
+info:
+  title: ''
+  version: 0.0.0
+paths:
+  /books/:
+    get:
+      operationId: books_list
+      tags:
+      - books
+      security:
+      - cookieAuth: []
+      - basicAuth: []
+      - {}
+      responses:
+        '200':
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/Book'
+          description: ''
+    post:
+      operationId: books_create
+      tags:
+      - books
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/Book'
+          application/x-www-form-urlencoded:
+            schema:
+              $ref: '#/components/schemas/Book'
+          multipart/form-data:
+            schema:
+              $ref: '#/components/schemas/Book'
+        required: true
+      security:
+      - cookieAuth: []
+      - basicAuth: []
+      - {}
+      responses:
+        '201':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Book'
+          description: ''
+  /books/{id}/:
+    get:
+      operationId: books_retrieve
+      parameters:
+      - in: path
+        name: id
+        schema:
+          type: integer
+          maximum: 9223372036854775807
+          minimum: -9223372036854775808
+          format: int64
+        description: A unique value identifying this book.
+        required: true
+      tags:
+      - books
+      security:
+      - cookieAuth: []
+      - basicAuth: []
+      - {}
+      responses:
+        '200':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Book'
+          description: ''
+    put:
+      operationId: books_update
+      parameters:
+      - in: path
+        name: id
+        schema:
+          type: integer
+          maximum: 9223372036854775807
+          minimum: -9223372036854775808
+          format: int64
+        description: A unique value identifying this book.
+        required: true
+      tags:
+      - books
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/Book'
+          application/x-www-form-urlencoded:
+            schema:
+              $ref: '#/components/schemas/Book'
+          multipart/form-data:
+            schema:
+              $ref: '#/components/schemas/Book'
+        required: true
+      security:
+      - cookieAuth: []
+      - basicAuth: []
+      - {}
+      responses:
+        '200':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Book'
+          description: ''
+    patch:
+      operationId: books_partial_update
+      parameters:
+      - in: path
+        name: id
+        schema:
+          type: integer
+          maximum: 9223372036854775807
+          minimum: -9223372036854775808
+          format: int64
+        description: A unique value identifying this book.
+        required: true
+      tags:
+      - books
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/PatchedBook'
+          application/x-www-form-urlencoded:
+            schema:
+              $ref: '#/components/schemas/PatchedBook'
+          multipart/form-data:
+            schema:
+              $ref: '#/components/schemas/PatchedBook'
+      security:
+      - cookieAuth: []
+      - basicAuth: []
+      - {}
+      responses:
+        '200':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Book'
+          description: ''
+    delete:
+      operationId: books_destroy
+      parameters:
+      - in: path
+        name: id
+        schema:
+          type: integer
+          maximum: 9223372036854775807
+          minimum: -9223372036854775808
+          format: int64
+        description: A unique value identifying this book.
+        required: true
+      tags:
+      - books
+      security:
+      - cookieAuth: []
+      - basicAuth: []
+      - {}
+      responses:
+        '204':
+          description: No response body
+components:
+  schemas:
+    Book:
+      type: object
+      properties:
+        name:
+          type: string
+          maxLength: 255
+      required:
+      - name
+    PatchedBook:
+      type: object
+      properties:
+        name:
+          type: string
+          maxLength: 255
+  securitySchemes:
+    basicAuth:
+      type: http
+      scheme: basic
+    cookieAuth:
+      type: apiKey
+      in: cookie
+      name: sessionid

tests/contrib/test_drf_nested_routers.py

@@ -88,8 +88,4 @@ def get_queryset(self):
     assert_schema(
         _generate_nested_routers_schema(RootViewSet, ChildViewSet),
         'tests/contrib/test_drf_nested_routers.yml',
-        reverse_transforms=[
-            lambda x: x.replace('format: uuid', 'pattern: ^[0-9]+$'),
-            lambda x: x.replace('\n        description: A UUID string identifying this root.', '')
-        ]
     )