[Bug]: The string in integer format cannot be validated by the "type integer" rule.

[NieXiaoyi]

Actual Behavior

the spec:

components:
 schemas:
 User:
 type: object
 properties:
 id:
 type: string
 format: uuid
 username:
 type: string
 age:
 type: integer
 required:
 - id
 - username
 - age

the body of response:

{
 "id": "123e4567-e89b-12d3-a456-426614174000",
 "username": "Test User",
 "age": "30"
}

the verification result:
pass

Expected Behavior

Get an exception InvalidData, <ValidationError: "'30' is not of type 'integer'">, just like "openapi-core 0.18.2"

Steps to Reproduce

the spec:

openapi: 3.0.3
info:
 title: User Information API
 version: 1.0.0
servers:
 - url: http://localhost:8000/api
 description: Development Server
paths:
 /users/{userId}:
 get:
 summary: Get User Information
 description: Get user details by user ID
 parameters:
 - name: userId
 required: true
 in: path
 description: User ID
 schema:
 type: string
 format: uuid
 responses:
 '200':
 description: Successfully retrieved user information
 content:
 application/json:
 schema:
 $ref: '#/components/schemas/User'
 '404':
 description: User not found
 content:
 application/json:
 schema:
 $ref: '#/components/schemas/Error'
components:
 schemas:
 User:
 type: object
 properties:
 id:
 type: string
 format: uuid
 username:
 type: string
 age:
 type: integer
 required:
 - id
 - username
 - age
 Error:
 type: object
 properties:
 code:
 type: string
 description: Error code
 message:
 type: string
 description: Error message
 required:
 - code
 - message

usecase:

import pytest

from openapi_core import Spec
from openapi_core.validation.request import V30RequestValidator
from openapi_core.validation.response import V30ResponseValidator
from openapi_core.exceptions import OpenAPIError
from openapi_core.contrib.requests import RequestsOpenAPIRequest, RequestsOpenAPIResponse
from requests import Request, Response


base_api_url = 'http://localhost:8000/api'
openapi_spec = Spec.from_file_path('openapi/user_copy.yml')
request_validator = V30RequestValidator(openapi_spec)
response_validator = V30ResponseValidator(openapi_spec)


class TestGetUser:
 def test_invalid_type_of_age(self):
 """Test validation fails with invalid type of age"""
 url = f'{base_api_url}/users/123e4567-e89b-12d3-a456-426614174000'
 request = Request('GET', url)
 openapi_request = RequestsOpenAPIRequest(request)

 response = Response()
 response.status_code = 200
 # the type of age is string, not integer
 response._content = b'{"id": "123e4567-e89b-12d3-a456-426614174000", "username": "Test User", "age": "30"}'
 response.headers = {'Content-Type': 'application/json'}
 openapi_response = RequestsOpenAPIResponse(response)
 # Validate response against OpenAPI spec
 with pytest.raises(OpenAPIError):
 response_validator.validate(openapi_request, openapi_response)

OpenAPI Core Version

0.19.5

OpenAPI Core Integration

requests

Affected Area(s)

No response

References

No response

Anything else we need to know?

No response

Would you like to implement a fix?

None