Fix: Add robust JSON parsing for V3 query params and fix missing Any import causing startup failure.

app/routers/api_crud_v3.py

@@ -1,5 +1,5 @@
 from fastapi import APIRouter, Depends, Header, HTTPException, Path, Query, Request, Response, status
-from typing import Dict, List, Optional, Set, Union
+from typing import Any, Dict, List, Optional, Set, Union
 import json
 import urllib.parse
 import time
@@ -22,6 +22,19 @@ from app.db_sql import redis_lookup_id_random, sql_select, sql_insert, sql_updat
 
 router = APIRouter()
 
+def safe_json_loads(json_str: Optional[str]) -> Any:
+    """
+    Safely load a JSON string, handling 'undefined' or invalid formats 
+    common in frontend URL parameters.
+    """
+    if not json_str or json_str == 'undefined':
+        return None
+    try:
+        return json.loads(json_str)
+    except (json.JSONDecodeError, TypeError) as e:
+        log.warning(f"Failed to parse JSON string: {json_str}. Error: {e}")
+        return None
+
 @router.get("/health", response_model=Resp_Body_Base)
 async def health_check(
         delay: DelayParams = Depends(get_delay_params),
@@ -132,15 +145,9 @@ async def get_obj_li(
     and_like_dict_obj = None
     or_like_dict_obj = None
     and_in_dict_li_obj = None
-    jp_obj = None
-
-    if jp:
-        try:
-            jp_obj = json.loads(urllib.parse.unquote(jp))
-        except Exception as e:
-            log.warning(e)
-            return mk_resp(data=False, status_code=400, response=response, status_message='The JSON string was not formatted correctly.')
     
+    jp_obj = safe_json_loads(urllib.parse.unquote(jp)) if jp else None
+    if jp_obj:
         if jp_obj.get('qry'):
             qry_dict_li = jp_obj['qry']
         if jp_obj.get('ft_qry'):
@@ -154,8 +161,7 @@ async def get_obj_li(
         if jp_obj.get('and_in_li'):
             and_in_dict_li_obj = jp_obj['and_in_li']
 
-    if order_by_li:
+    order_by_li = safe_json_loads(order_by_li)
-        order_by_li = json.loads(order_by_li)
 
     obj_name = obj_type_l1
     if obj_name not in obj_type_kv_li:
@@ -253,8 +259,7 @@ async def search_obj_li(
     log.setLevel(logging.WARNING)
     log.debug(locals())
 
-    if order_by_li:
+    order_by_li = safe_json_loads(order_by_li)
-        order_by_li = json.loads(order_by_li)
 
     obj_name = obj_type_l1
     if obj_name not in obj_type_kv_li:
@@ -521,15 +526,9 @@ async def get_child_obj_li(
     and_like_dict_obj = None
     or_like_dict_obj = None
     and_in_dict_li_obj = None
-    jp_obj = None
-
-    if jp:
-        try:
-            jp_obj = json.loads(urllib.parse.unquote(jp))
-        except Exception as e:
-            log.warning(e)
-            return mk_resp(data=False, status_code=400, response=response, status_message='The JSON string was not formatted correctly.')
     
+    jp_obj = safe_json_loads(urllib.parse.unquote(jp)) if jp else None
+    if jp_obj:
         if jp_obj.get('qry'):
             qry_dict_li = jp_obj['qry']
         if jp_obj.get('ft_qry'):
@@ -543,8 +542,7 @@ async def get_child_obj_li(
         if jp_obj.get('and_in_li'):
             and_in_dict_li_obj = jp_obj['and_in_li']
 
-    if order_by_li:
+    order_by_li = safe_json_loads(order_by_li)
-        order_by_li = json.loads(order_by_li)
 
     obj_name = child_obj_type
     if obj_name not in obj_type_kv_li: