Merge pull request #144 from mauro-andre/143-dbmodel-initializes-empt…

…y-lists-as-none-causing-validationerror 🐛 DbModel initialize empty lists
mauro-andre · Jul 29, 2024 · 2aa052c · 2aa052c
2 parents 5363040 + 432a810
commit 2aa052c
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Showing 2 changed files with 8 additions and 3 deletions.
diff --git a/pyodmongo/models/db_model.py b/pyodmongo/models/db_model.py
@@ -80,9 +80,7 @@ def __init__(self, **attrs):
                     try:
                         default_value = self.__class__.model_fields[key].default
                         attrs[key] = (
-                            None
-                            if default_value == PydanticUndefined
-                            else default_value
+                            [] if default_value == PydanticUndefined else default_value
                         )
                     except KeyError:
                         ...

diff --git a/tests/test_class.py b/tests/test_class.py
@@ -200,3 +200,10 @@ class SecondClass(FirstClass):
     assert type(obj_1.attr_1) is str
     assert obj_2.attr_1 == 1
     assert type(obj_2.attr_1) is int
+
+
+def test_empty_list_field():
+    class A(DbModel):
+        x: list[int]
+
+    A(x=[])