Fix: include application config language settings for dateparser auto-detection (#10722)

src/paperless/settings.py

@@ -17,8 +17,6 @@ from dateparser.languages.loader import LocaleDataLoader
 from django.utils.translation import gettext_lazy as _
 from dotenv import load_dotenv
 
-from paperless.utils import ocr_to_dateparser_languages
-
 logger = logging.getLogger("paperless.settings")
 
 # Tap paperless.conf if it's available
@@ -1184,61 +1182,6 @@ DATE_ORDER = os.getenv("PAPERLESS_DATE_ORDER", "DMY")
 FILENAME_DATE_ORDER = os.getenv("PAPERLESS_FILENAME_DATE_ORDER")
 
 
-def _ocr_to_dateparser_languages(ocr_languages: str) -> list[str]:
-    """
-    Convert Tesseract OCR_LANGUAGE codes (ISO 639-2, e.g. "eng+fra", with optional scripts like "aze_Cyrl")
-    into a list of locales compatible with the `dateparser` library.
-
-    - If a script is provided (e.g., "aze_Cyrl"), attempts to use the full locale (e.g., "az-Cyrl").
-    Falls back to the base language (e.g., "az") if needed.
-    - If a language cannot be mapped or validated, it is skipped with a warning.
-    - Returns a list of valid locales, or an empty list if none could be converted.
-    """
-    ocr_to_dateparser = ocr_to_dateparser_languages()
-    loader = LocaleDataLoader()
-    result = []
-    try:
-        for ocr_language in ocr_languages.split("+"):
-            # Split into language and optional script
-            ocr_lang_part, *script = ocr_language.split("_")
-            ocr_script_part = script[0] if script else None
-
-            language_part = ocr_to_dateparser.get(ocr_lang_part)
-            if language_part is None:
-                logger.debug(
-                    f'Unable to map OCR language "{ocr_lang_part}" to dateparser locale. ',
-                )
-                continue
-
-            # Ensure base language is supported by dateparser
-            loader.get_locale_map(locales=[language_part])
-
-            # Try to add the script part if it's supported by dateparser
-            if ocr_script_part:
-                dateparser_language = f"{language_part}-{ocr_script_part.title()}"
-                try:
-                    loader.get_locale_map(locales=[dateparser_language])
-                except Exception:
-                    logger.info(
-                        f"Language variant '{dateparser_language}' not supported by dateparser; falling back to base language '{language_part}'. You can manually set PAPERLESS_DATE_PARSER_LANGUAGES if needed.",
-                    )
-                    dateparser_language = language_part
-            else:
-                dateparser_language = language_part
-            if dateparser_language not in result:
-                result.append(dateparser_language)
-    except Exception as e:
-        logger.warning(
-            f"Error auto-configuring dateparser languages. Set PAPERLESS_DATE_PARSER_LANGUAGES parameter to avoid this. Detail: {e}",
-        )
-        return []
-    if not result:
-        logger.info(
-            "Unable to automatically determine dateparser languages from OCR_LANGUAGE, falling back to multi-language support.",
-        )
-    return result
-
-
 def _parse_dateparser_languages(languages: str | None):
     language_list = languages.split("+") if languages else []
     # There is an unfixed issue in zh-Hant and zh-Hans locales in the dateparser lib.
@@ -1253,12 +1196,14 @@ def _parse_dateparser_languages(languages: str | None):
     return list(LocaleDataLoader().get_locale_map(locales=language_list))
 
 
-if os.getenv("PAPERLESS_DATE_PARSER_LANGUAGES"):
-    DATE_PARSER_LANGUAGES = _parse_dateparser_languages(
+# If not set, we will infer it at runtime
+DATE_PARSER_LANGUAGES = (
+    _parse_dateparser_languages(
         os.getenv("PAPERLESS_DATE_PARSER_LANGUAGES"),
     )
-else:
-    DATE_PARSER_LANGUAGES = _ocr_to_dateparser_languages(OCR_LANGUAGE)
+    if os.getenv("PAPERLESS_DATE_PARSER_LANGUAGES")
+    else None
+)
 
 
 # Maximum number of dates taken from document start to end to show as suggestions for