feat(schemas): add field validators for ArticleResponse

schemas/articles/articles.py

@@ -1,4 +1,4 @@
-from pydantic import BaseModel, Field, validator
+from pydantic import BaseModel, Field, validator, field_validator
 from typing import List, Optional
 from datetime import date, datetime
 
@@ -725,6 +725,22 @@ class ArticleResponse(BaseModel):
         None, description="Exclure de certains traitements (champ personnalisé)"
     )
     
+    @field_validator('unite_vente', 'unite_poids', 'gamme_1', 'gamme_2', 'conditionnement', mode='before')
+    @classmethod
+    def convert_int_to_str(cls, v):
+        if v is None:
+            return None
+        if v == 0:
+            return ""
+        return str(v)
+    
+    @field_validator('suivi_stock', mode='before')
+    @classmethod
+    def convert_int_to_bool(cls, v):
+        if v is None:
+            return None
+        return bool(v)
+
     class Config:
         json_schema_extra = {
             "example": {