update

backend/fullstack/validation/__init__.py

 import functools
+import json
 
 from flask import request
 from marshmallow import Schema, ValidationError
@@ -10,17 +11,24 @@ def validate_schema(schema_class: Schema):
     def decorator(view_func):
         @functools.wraps(view_func)
         def inner(*args, **kwargs):
-            if request.method == 'GET':
-                form_data = request.args
-            else:
-                if request.json:
-                    form_data = request.json
-                else:
-                    form_data = request.form
+
             try:
+                if request.method == "GET":
+                    form_data = request.args
+                elif request.method == "POST":
+                    if request.content_type and request.content_type.startswith('application/json'):
+                        form_data = request.json
+                    elif request.content_type and request.content_type.startswith('application/x-www-form-urlencoded'):
+                        form_data = request.values
+                    elif request.content_type and request.content_type.startswith('multipart/form-data'):
+                        form_data = request.form
+                    else:
+                        form_data = json.loads(request.data)
+                        
                 data = schema_class().load(form_data)
                 request.schema_data = data
             except ValidationError as e:
+                raise
                 if config['DEBUG']:
                     return response_result(ResponseCode.PARAMETER_ERROR, e.messages if config['DEBUG'] else None)
             return view_func(*args, **kwargs)