feat(mongo): preserve BSON types when cloning and saving documents

crates/dbx-core/src/db/mongo_driver.rs

@@ -1651,6 +1651,21 @@ pub async fn insert_document(
     Ok(format!("{}", result.inserted_id))
 }
 
+/// Inserts a document from canonical Extended JSON without interpreting
+/// Mongo shell-like strings such as `ISODate(...)`.
+pub async fn insert_document_extended_json(
+    client: &Client,
+    database: &str,
+    collection: &str,
+    doc_json: &str,
+) -> Result<String, String> {
+    let value: serde_json::Value = serde_json::from_str(doc_json).map_err(|e| format!("Invalid JSON: {e}"))?;
+    let doc = json_object_to_document_extended_json(&value).map_err(|e| format!("Invalid document: {e}"))?;
+    let col = client.database(database).collection::<Document>(collection);
+    let result = col.insert_one(doc).await.map_err(|e| e.to_string())?;
+    Ok(format!("{}", result.inserted_id))
+}
+
 pub async fn insert_documents(
     client: &Client,
     database: &str,
@@ -3492,6 +3507,21 @@ mod tests {
         assert!(matches!(doc.get("count"), Some(Bson::Int64(42))));
     }
 
+    #[test]
+    fn json_object_to_document_extended_json_keeps_shell_date_strings_literal() {
+        let value = serde_json::json!({
+            "date_text": "ISODate(\"2026-08-10T00:00:00.000Z\")",
+            "actual_date": { "$date": "2026-08-10T00:00:00.000Z" },
+        });
+        let doc = json_object_to_document_extended_json(&value).unwrap();
+
+        assert!(matches!(
+            doc.get("date_text"),
+            Some(Bson::String(value)) if value == "ISODate(\"2026-08-10T00:00:00.000Z\")"
+        ));
+        assert!(matches!(doc.get("actual_date"), Some(Bson::DateTime(_))));
+    }
+
     #[test]
     fn parse_gridfs_file_id_accepts_extended_json_object_id() {
         let id = parse_gridfs_file_id(r#"{"$oid":"507f1f77bcf86cd799439011"}"#).unwrap();

crates/dbx-core/src/document_ops.rs

@@ -524,6 +524,27 @@ pub async fn insert_document_core(
     }
 }
 
+pub async fn insert_document_preserving_bson_types_core(
+    state: &AppState,
+    connection_id: &str,
+    database: &str,
+    collection: &str,
+    doc_json: &str,
+    routing: Option<&str>,
+) -> Result<String, String> {
+    ensure_document_pool(state, connection_id).await?;
+    let connections = state.connections.read().await;
+    match connections.get(connection_id).ok_or("Not found")? {
+        PoolKind::MongoDb(client) => {
+            mongo_driver::insert_document_extended_json(client, database, collection, doc_json).await
+        }
+        _ => {
+            drop(connections);
+            insert_document_core(state, connection_id, database, collection, doc_json, routing).await
+        }
+    }
+}
+
 pub async fn update_document_core(
     state: &AppState,
     connection_id: &str,