From 5e95a0e2ae2d24cd2b7cf0ae7a84edbb85524a38 Mon Sep 17 00:00:00 2001
From: Viicos <65306057+Viicos@users.noreply.github.com>
Date: Thu, 2 Oct 2025 21:22:26 +0200
Subject: [PATCH] Only create class instance after validation in
 `ModelValidator.validate_construct()`

---
 src/validators/model.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/validators/model.rs b/src/validators/model.rs
index 3385f68b6..5f7a5970d 100644
--- a/src/validators/model.rs
+++ b/src/validators/model.rs
@@ -300,11 +300,12 @@ impl ModelValidator {
             }
         }
 
-        let instance = create_class(self.class.bind(py))?;
+        let instance;
 
         if self.root_model {
             let state = &mut state.rebind_extra(|extra| extra.field_name = Some(PyString::new(py, ROOT_FIELD)));
             let output = self.validator.validate(py, input, state)?;
+            instance = create_class(self.class.bind(py))?;
 
             let fields_set = if input.as_python().is_some_and(|py_input| py_input.is(&self.undefined)) {
                 PySet::empty(py)?
@@ -315,6 +316,7 @@ impl ModelValidator {
             force_setattr(py, &instance, intern!(py, ROOT_FIELD), output)?;
         } else {
             let output = self.validator.validate(py, input, state)?;
+            instance = create_class(self.class.bind(py))?;
 
             let (model_dict, model_extra, val_fields_set): (Bound<PyAny>, Bound<PyAny>, Bound<PyAny>) =
                 output.extract(py)?;