Added the transaction management.

src/accounting/utils/pagination.py

@@ -115,7 +115,7 @@ class EmptyPagination(AbstractPagination[T]):
 
 class NonEmptyPagination(AbstractPagination[T]):
     """The pagination with real data."""
-    PAGE_SIZE_OPTIONS: list[int] = [10, 100, 200]
+    PAGE_SIZE_OPTION_VALUES: list[int] = [10, 100, 200]
     """The page size options."""
 
     def __init__(self, items: list[T], is_reversed: bool = False):
@@ -278,7 +278,7 @@ class NonEmptyPagination(AbstractPagination[T]):
             return []
         return [Link(str(x), self.__uri_size(x),
                      is_current=x == self.page_size)
-                for x in self.PAGE_SIZE_OPTIONS]
+                for x in self.PAGE_SIZE_OPTION_VALUES]
 
     def __uri_size(self, page_size: int) -> str:
         """Returns the URI of a page size.

src/accounting/utils/strip_text.py

@@ -19,6 +19,7 @@
 This module should not import any other module from the application.
 
 """
+import re
 
 
 def strip_text(s: str | None) -> str | None:
@@ -31,3 +32,15 @@ def strip_text(s: str | None) -> str | None:
         return None
     s = s.strip()
     return s if s != "" else None
+
+
+def strip_multiline_text(s: str | None) -> str | None:
+    """The filter to strip a piece of multi-line text.
+
+    :param s: The text input string.
+    :return: The filtered string.
+    """
+    if s is None:
+        return None
+    s = re.sub(r"^\s*\n", "", s.rstrip())
+    return s if s != "" else None