fix: gradio cached examples

.gitignore

@@ -0,0 +1 @@
+.env

app.py

@@ -33,13 +33,13 @@ def process_fields(fields):
 def process_records_gradio(records, fields, question, example_records=None):
     try:
         # Convert string inputs to dictionaries
-        if isinstance(records, str):
+        if isinstance(records, str) and records:
             records = json.loads(records)
-        if isinstance(example_records, str):
+        if isinstance(example_records, str) and example_records:
             example_records = json.loads(example_records)
-        if isinstance(fields, str):
+        if isinstance(fields, str) and fields:
             fields = json.loads(fields)
-        if isinstance(question, str):
+        if isinstance(question, str) and question:
             question = json.loads(question)
 
         if not fields and not question:
@@ -60,7 +60,7 @@ def process_records_gradio(records, fields, question, example_records=None):
 
         return json.dumps({"results": results}, indent=2)
     except Exception as e:
-        raise Exception(f"Error: {str(e)}")
+        raise gr.Error(f"Error: {str(e)}")
 
 
 description = """