Update app.py

app.py

@@ -242,7 +242,6 @@ async def get_kepler_summary():
     }
     return summary
 
-
 # ============================================================================
 # ENDPOINTS PARA DATASET K2
 # ============================================================================
@@ -366,6 +365,12 @@ async def get_tess_exoplanets(
     available_columns = [col for col in columns_to_include if col in df_page.columns]
     df_result = df_page[available_columns]
     
+    # Convertir campos que deben ser strings
+    string_fields = ['ctoi_alias', 'rastr', 'decstr']
+    for field in string_fields:
+        if field in df_result.columns:
+            df_result[field] = df_result[field].apply(lambda x: str(x) if pd.notna(x) else None)
+    
     return DatasetListResponse(
         total=total,
         count=len(df_result),
@@ -391,6 +396,12 @@ async def get_tess_by_id(toi_id: float):
     # Convertir a diccionario
     data = toi_obj.iloc[0].where(pd.notna(toi_obj.iloc[0]), None).to_dict()
     
+    # Convertir campos que deben ser strings
+    string_fields = ['ctoi_alias', 'rastr', 'decstr']
+    for field in string_fields:
+        if field in data and data[field] is not None:
+            data[field] = str(data[field])
+    
     return ExoplanetTOI(**data)