src/accounting/currency/forms.py

@@ -17,6 +17,8 @@
 """The forms for the currency management.
 
 """
+from __future__ import annotations
+
 from flask_wtf import FlaskForm
 from wtforms import StringField, ValidationError
 from wtforms.validators import DataRequired, Regexp, NoneOf
@@ -28,25 +30,22 @@ from accounting.utils.strip_text import strip_text
 from accounting.utils.user import get_current_user_pk
 
 
-class CodeUnique:
-    """The validator to check if the code is unique."""
-
-    def __call__(self, form: FlaskForm, field: StringField) -> None:
-        if field.data == "":
-            return
-        if not isinstance(form, CurrencyForm):
-            return
-        if form.obj_code is not None and form.obj_code == field.data:
-            return
-        if db.session.get(Currency, field.data) is not None:
-            raise ValidationError(lazy_gettext(
-                "Code conflicts with another currency."))
-
-
 class CurrencyForm(FlaskForm):
     """The form to create or edit a currency."""
     CODE_BLOCKLIST: list[str] = ["create", "store", "exists-code"]
     """The reserved codes that are not available."""
+
+    class CodeUnique:
+        """The validator to check if the code is unique."""
+        def __call__(self, form: CurrencyForm, field: StringField) -> None:
+            if field.data == "":
+                return
+            if form.obj_code is not None and form.obj_code == field.data:
+                return
+            if db.session.get(Currency, field.data) is not None:
+                raise ValidationError(lazy_gettext(
+                    "Code conflicts with another currency."))
+
     code = StringField(
         filters=[strip_text],
         validators=[DataRequired(lazy_gettext("Please fill in the code.")),

src/accounting/transaction/forms/journal_entry.py

@@ -17,6 +17,8 @@
 """The journal entry sub-forms for the transaction management.
 
 """
+from __future__ import annotations
+
 import re
 
 from flask_babel import LazyString

src/accounting/transaction/forms/reorder.py

@@ -17,6 +17,8 @@
 """The reorder forms for the transaction management.
 
 """
+from __future__ import annotations
+
 from datetime import date
 
 from flask import request

src/accounting/transaction/utils/account_option.py

@@ -17,6 +17,8 @@
 """The account option for the transaction management.
 
 """
+from __future__ import annotations
+
 from accounting.models import Account