allow non-expandable objects

Author: dfalbel

extensions/positron-python/python_files/posit/positron/connections.py

@@ -48,6 +48,7 @@ class ConnectionObjectInfo(TypedDict):
 class ConnectionObject(TypedDict):
     name: str
     kind: str
+    has_children: bool | None
 
 
 class ConnectionObjectFields(TypedDict):
@@ -1090,6 +1091,7 @@ def list_objects(self, path: list[ObjectSchema]):
                         {
                             "name": row["volume_name"],
                             "kind": "volume",
+                            "has_children": False,
                         }
                     )
                     for row in volumes

extensions/positron-python/python_files/posit/positron/connections_comm.py

@@ -31,6 +31,11 @@ class ObjectSchema(BaseModel):
         description="The object type (table, catalog, schema)",
     )
 
+    has_children: Optional[StrictBool] = Field(
+        default=None,
+        description="Indicates if the object has children that can be listed. This property is optional and when omitted, it is assumed that the object may have children unless its kind is 'field'.",
+    )
+
 
 class FieldSchema(BaseModel):
     """

positron/comms/connections-backend-openrpc.json

@@ -174,6 +174,10 @@
 					"kind": {
 						"type": "string",
 						"description": "The object type (table, catalog, schema)"
+					},
+					"has_children": {
+						"type": "boolean",
+						"description": "Indicates if the object has children that can be listed. This property is optional and when omitted, it is assumed that the object may have children unless its kind is 'field'."
 					}
 				}
 			},

src/vs/workbench/services/languageRuntime/common/positronConnectionsComm.ts

@@ -25,6 +25,13 @@ export interface ObjectSchema {
 	 */
 	kind: string;
 
+	/**
+	 * Indicates if the object has children that can be listed. This property
+	 * is optional and when omitted, it is assumed that the object may have
+	 * children unless its kind is 'field'.
+	 */
+	has_children?: boolean;
+
 }
 
 /**

src/vs/workbench/services/positronConnections/browser/positronConnectionsInstance.ts

@@ -78,7 +78,7 @@ export class PositronConnectionsInstance extends BaseConnectionsInstance impleme
 				let icon: string | undefined = await object.getIcon();
 				if (!icon || icon === '') {
 					icon = undefined;
-				} else if (!icon.startsWith("data:image/")) {
+				} else if (!icon.startsWith('data:image/')) {
 					// icon paths starting with data:image/ are assumed to be data URI's
 					// not file paths.
 					icon = FileAccess.uriToBrowserUri(URI.file(icon)).toString();
@@ -389,6 +389,7 @@ class PositronConnectionItem implements IPositronConnectionItem {
 		this._name = last_elt.name;
 		this._kind = last_elt.kind;
 		this._dtype = last_elt.dtype;
+		this._has_children = last_elt.has_children;
 	}
 
 	get id() {