Ensure that attributes set during contribute_to_class are copied.

Makefile

@@ -2,7 +2,7 @@
 .PHONY: install
 install:
 	python3 -m pip install build twine
-	python3 -m pip install -e .[dev,rest]
+	python3 -m pip install -e .[dev,test]
 
 
 .PHONY: build

django_pydantic_field/fields.py

@@ -54,7 +54,9 @@ def __init__(
 
     def __copy__(self):
         _, _, args, kwargs = self.deconstruct()
-        return type(self)(*args, **kwargs)
+        copied = type(self)(*args, **kwargs)
+        copied.set_attributes_from_name(self.name)
+        return copied
 
     def get_default(self):
         value = super().get_default()

tests/test_django_model_field.py

@@ -2,6 +2,7 @@
 import sys
 import typing as t
 from collections import abc
+from copy import copy
 from datetime import date
 
 import django
@@ -12,6 +13,7 @@
 from django_pydantic_field import fields
 
 from .conftest import InnerSchema, SampleDataclass
+from .sample_app.models import Building
 from .test_app.models import SampleForwardRefModel, SampleModel, SampleSchema
 
 
@@ -313,3 +315,11 @@ def serialize_field(field: fields.PydanticSchemaField) -> str:
 
 def reconstruct_field(field_repr: str) -> fields.PydanticSchemaField:
     return eval(field_repr, globals(), sys.modules)
+
+
+def test_copy_field():
+    copied = copy(Building.meta.field)
+
+    assert copied.name == Building.meta.field.name
+    assert copied.attname == Building.meta.field.attname
+    assert copied.concrete == Building.meta.field.concrete