add func get_encrypted_fields

.pre-commit-config.yaml

@@ -13,7 +13,7 @@ repos:
     rev: 23.3.0
     hooks:
       - id: black
-        language_version: python3.9
+        language_version: python3.10
 
   - repo: https://github.com/pycqa/flake8
     rev: 6.0.0

django_crypto_fields/utils.py

@@ -1,5 +1,21 @@
-def has_encrypted_fields(model):
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from .fields import BaseField
+
+
+def has_encrypted_fields(model) -> bool:
     for field in model._meta.get_fields():
         if hasattr(field, "field_cryptor"):
             return True
     return False
+
+
+def get_encrypted_fields(model) -> list[BaseField]:
+    encrypted_fields = []
+    for field in model._meta.get_fields():
+        if hasattr(field, "field_cryptor"):
+            encrypted_fields.append(field)
+    return encrypted_fields