fix: ValueError: mutable default <class 'list'> for field x is not alowed: use default_factory

src/autofaker/generator.py

@@ -69,15 +69,14 @@ def __init__(self, cls, use_fake_data: bool = False):
         self.cls = cls
 
     def generate(self):
-        args = []
         fields = dataclasses.fields(self.cls)
-        for field in fields:
+        params = {}
+        for dataclass_field in fields:
             generator = TypeDataGenerator.create(
-                field.type, field.name, use_fake_data=self.use_fake_data
+                dataclass_field.type, dataclass_field.name, use_fake_data=self.use_fake_data
             )
-            args.append((field.name, field.type, generator.generate()))
-        name = self.cls.__module__ + "." + self.cls.__qualname__
-        instance = dataclasses.make_dataclass(name, args)
+            params[dataclass_field.name] = generator.generate()
+        instance = self.cls(**params)
         return instance
 
 

tests/test_create_anonymous_data_classes.py

@@ -1,6 +1,7 @@
 import dataclasses
 import unittest
 from dataclasses import dataclass
+from typing import List
 
 from autofaker import Autodata
 
@@ -9,6 +10,8 @@
 class DataClass:
     id: int
     text: str
+    list_of_str: List[str]
+    list_of_int: List[int]
 
 
 class AnonymousDataClassTestCase(unittest.TestCase):
@@ -28,6 +31,8 @@ def test_create_many_data_class_returns_dataclass(self):
         data = Autodata.create(DataClass)
         self.assertNotEqual(0, data.id)
         self.assertNotEqual("", data.text)
+        self.assertNotEqual("", data.list_of_str[0])
+        self.assertNotEqual(0, data.list_of_int[0])
 
 
 @dataclass