Updated spec_url to allow for file in root, without a path prefix, wh…

…en Configuration path set to None.

spectree/config.py

@@ -65,8 +65,8 @@ class Configuration(BaseSettings):
     license: Optional[License] = None
 
     # SpecTree configurations
-    #: OpenAPI doc route path prefix (i.e. /apidoc/)
-    path: str = "apidoc"
+    #: OpenAPI doc route path prefix (i.e. /apidoc/) or `None` for no path prefix.
+    path: Optional[str] = "apidoc"
     #: OpenAPI file route path suffix (i.e. /apidoc/openapi.json)
     filename: str = "openapi.json"
     #: OpenAPI version (doesn't affect anything)
@@ -117,6 +117,8 @@ def convert_to_lower_case(cls, values: Mapping[str, Any]) -> Dict[str, Any]:
 
     @property
     def spec_url(self) -> str:
+        if self.path is None:
+            return f"/{self.filename}"
         return f"/{self.path}/{self.filename}"
 
     def swagger_oauth2_config(self) -> Dict[str, str]:

tests/test_config.py

@@ -60,6 +60,15 @@ def test_config_case():
     assert config.title == "Demo"
 
 
+@pytest.mark.parametrize(
+    ("path", "expected_url"),
+    [("prefix", "/prefix/openapi.json"), (None, "/openapi.json")],
+)
+def test_config_path(path, expected_url):
+    config = Configuration(path=path)
+    assert config.spec_url == expected_url
+
+
 @pytest.mark.parametrize(("secure_item"), SECURITY_SCHEMAS)
 def test_update_security_scheme(secure_item: Type[SecurityScheme]):
     # update and validate each schema type