We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Add OpenAPI Specification for /schemas/ endpoint and fix the incorrect specs
## Problem
In order to ensure the accuracy of the specs generated by drf-spectacular for /schemas/ endpoint , we will generate an OpenAPI Specification specifically for this endpoint. This will allow us to verify its correctness by comparing it with the existing test cases and the DRF browsable API page.

## Proposed solution
* Implement custom preprocessing hook function  to filter out all endpoints except for the /schemas/ endpoint.The hook function selectively retains only the endpoint paths that match the /schemas/ 
* Configure the PREPROCESSING_HOOKS setting with the custom hook function, we ensure that only the /schemas/ endpoint is considered during the OpenAPI specification generation process.
* Finally, generate the spec file using the `manage.py spectacular --color --file schema.yml` command

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `config/settings/openapi.py`
Content:
```
1 def custom_preprocessing_hook(endpoints):
2     filtered = []
3     for (path, path_regex, method, callback) in endpoints:
4         # Remove all but DRF API endpoints
5         if path.startswith("/api/db/v0/databases/") or path.startswith("/api/db/v0/data_files/"):
6             filtered.append((path, path_regex, method, callback))
7     return filtered
8 
9 
10 def remove_url_prefix_hook(result, **kwargs):
11     # Remove namespace and version URL prefix from the operation Id of the generated API schema
12     for path, path_info in result['paths'].items():
13         for method, operation in path_info.items():
14             operation_id = operation.get('operationId')
15             if operation_id:
16                 if path.startswith('/api/db/v0/'):
17                     operation['operationId'] = operation_id.replace('db_v0_', '')
18                 elif path.startswith('/api/ui/v0/'):
19                     operation['operationId'] = operation_id.replace('ui_v0_', '')
20 
21     return result
22
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/config/settings/openapi.py b/config/settings/openapi.py
--- a/config/settings/openapi.py
+++ b/config/settings/openapi.py
@@ -2,7 +2,7 @@
     filtered = []
     for (path, path_regex, method, callback) in endpoints:
         # Remove all but DRF API endpoints
-        if path.startswith("/api/db/v0/databases/") or path.startswith("/api/db/v0/data_files/"):
+        if path.startswith("/api/db/v0/databases/") or path.startswith("/api/db/v0/data_files/") or path.startswith("/api/db/v0/schemas/"):
             filtered.append((path, path_regex, method, callback))
     return filtered

{"golden_diff": "diff --git a/config/settings/openapi.py b/config/settings/openapi.py\n--- a/config/settings/openapi.py\n+++ b/config/settings/openapi.py\n@@ -2,7 +2,7 @@\n     filtered = []\n     for (path, path_regex, method, callback) in endpoints:\n         # Remove all but DRF API endpoints\n-        if path.startswith(\"/api/db/v0/databases/\") or path.startswith(\"/api/db/v0/data_files/\"):\n+        if path.startswith(\"/api/db/v0/databases/\") or path.startswith(\"/api/db/v0/data_files/\") or path.startswith(\"/api/db/v0/schemas/\"):\n             filtered.append((path, path_regex, method, callback))\n     return filtered\n", "issue": "Add OpenAPI Specification for /schemas/ endpoint and fix the incorrect specs\n## Problem\r\nIn order to ensure the accuracy of the specs generated by drf-spectacular for /schemas/ endpoint , we will generate an OpenAPI Specification specifically for this endpoint. This will allow us to verify its correctness by comparing it with the existing test cases and the DRF browsable API page.\r\n\r\n## Proposed solution\r\n* Implement custom preprocessing hook function  to filter out all endpoints except for the /schemas/ endpoint.The hook function selectively retains only the endpoint paths that match the /schemas/ \r\n* Configure the PREPROCESSING_HOOKS setting with the custom hook function, we ensure that only the /schemas/ endpoint is considered during the OpenAPI specification generation process.\r\n* Finally, generate the spec file using the `manage.py spectacular --color --file schema.yml` command\n", "before_files": [{"content": "def custom_preprocessing_hook(endpoints):\n    filtered = []\n    for (path, path_regex, method, callback) in endpoints:\n        # Remove all but DRF API endpoints\n        if path.startswith(\"/api/db/v0/databases/\") or path.startswith(\"/api/db/v0/data_files/\"):\n            filtered.append((path, path_regex, method, callback))\n    return filtered\n\n\ndef remove_url_prefix_hook(result, **kwargs):\n    # Remove namespace and version URL prefix from the operation Id of the generated API schema\n    for path, path_info in result['paths'].items():\n        for method, operation in path_info.items():\n            operation_id = operation.get('operationId')\n            if operation_id:\n                if path.startswith('/api/db/v0/'):\n                    operation['operationId'] = operation_id.replace('db_v0_', '')\n                elif path.startswith('/api/ui/v0/'):\n                    operation['operationId'] = operation_id.replace('ui_v0_', '')\n\n    return result\n", "path": "config/settings/openapi.py"}], "after_files": [{"content": "def custom_preprocessing_hook(endpoints):\n    filtered = []\n    for (path, path_regex, method, callback) in endpoints:\n        # Remove all but DRF API endpoints\n        if path.startswith(\"/api/db/v0/databases/\") or path.startswith(\"/api/db/v0/data_files/\") or path.startswith(\"/api/db/v0/schemas/\"):\n            filtered.append((path, path_regex, method, callback))\n    return filtered\n\n\ndef remove_url_prefix_hook(result, **kwargs):\n    # Remove namespace and version URL prefix from the operation Id of the generated API schema\n    for path, path_info in result['paths'].items():\n        for method, operation in path_info.items():\n            operation_id = operation.get('operationId')\n            if operation_id:\n                if path.startswith('/api/db/v0/'):\n                    operation['operationId'] = operation_id.replace('db_v0_', '')\n                elif path.startswith('/api/ui/v0/'):\n                    operation['operationId'] = operation_id.replace('ui_v0_', '')\n\n    return result\n", "path": "config/settings/openapi.py"}]}