empty search is now allowed

search/src/lib.rs

@@ -25,7 +25,7 @@ pub struct SearcherService {
     pub pool: PgPool,
 }
 
-// Normalize diacritics in queries (no changes here)
+// normalize_slovak_text function remains unchanged...
 fn normalize_slovak_text(text: &str) -> String {
     // ... function content is unchanged ...
     text.chars()
@@ -73,9 +73,48 @@ impl Searcher for SearcherService {
         let table_name = req.table_name;
         let query_str = req.query;
 
+        // --- MODIFIED LOGIC ---
+        // If the query is empty, fetch the 5 most recent records.
         if query_str.trim().is_empty() {
-            return Err(Status::invalid_argument("Query cannot be empty"));
+            info!(
+                "Empty query for table '{}'. Fetching default results.",
+                table_name
+            );
+            let qualified_table = format!("gen.\"{}\"", table_name);
+            let sql = format!(
+                "SELECT id, to_jsonb(t) AS data FROM {} t ORDER BY id DESC LIMIT 5",
+                qualified_table
+            );
+
+            let rows = sqlx::query(&sql)
+                .fetch_all(&self.pool)
+                .await
+                .map_err(|e| {
+                    Status::internal(format!(
+                        "DB query for default results failed: {}",
+                        e
+                    ))
+                })?;
+
+            let hits: Vec<Hit> = rows
+                .into_iter()
+                .map(|row| {
+                    let id: i64 = row.try_get("id").unwrap_or_default();
+                    let json_data: serde_json::Value =
+                        row.try_get("data").unwrap_or_default();
+                    Hit {
+                        id,
+                        // Score is 0.0 as this is not a relevance-ranked search
+                        score: 0.0,
+                        content_json: json_data.to_string(),
+                    }
+                })
+                .collect();
+
+            info!("--- SERVER: Successfully processed empty query. Returning {} default hits. ---", hits.len());
+            return Ok(Response::new(SearchResponse { hits }));
         }
+        // --- END OF MODIFIED LOGIC ---
 
         let index_path = Path::new("./tantivy_indexes").join(&table_name);
         if !index_path.exists() {
@@ -98,15 +137,6 @@ impl Searcher for SearcherService {
         let searcher = reader.searcher();
         let schema = index.schema();
 
-        let prefix_edge_field = schema.get_field("prefix_edge").map_err(|_| {
-            Status::internal("Schema is missing the 'prefix_edge' field.")
-        })?;
-        let prefix_full_field = schema.get_field("prefix_full").map_err(|_| {
-            Status::internal("Schema is missing the 'prefix_full' field.")
-        })?;
-        let text_ngram_field = schema.get_field("text_ngram").map_err(|_| {
-            Status::internal("Schema is missing the 'text_ngram' field.")
-        })?;
         let pg_id_field = schema.get_field("pg_id").map_err(|_| {
             Status::internal("Schema is missing the 'pg_id' field.")
         })?;