id summary reporter owner description type status component version severity resolution keywords cc stage has_patch needs_docs needs_tests needs_better_patch easy ui_ux 16315 FileSystemStorage.listdir returns names with unicode normalization form that is different from names in database philomat nobody "When you want to write a function that finds files on disk that are not stored in the database anymore, and use FileSystemStorage.listdir to compare what's returned with what's in the database: You will not be able to compare strings without normalizing them first since unicode characters can be encoded using different normalization forms. This problem is best demonstrated with some example code: {{{ # Assuming that my storage root contains one folder named u'ä' >>> import os >>> from django.core.files.storage import FileSystemStorage >>> import unicodedata >>> # listdir returns u'a' followed by 'COMBINING DIAERESIS' (U+0308) >>> FileSystemStorage().listdir('')[0][0] u'a\u0308' # in the database, this character is stored using a different normalization form: >>> os.path.basename(FileSystemStorage().path(u'ä')) u'\xe4' # the values should be normalized: >>> unicodedata.normalize('NFC', FileSystemStorage().listdir('')[0][0]) u'\xe4' }}}" Bug closed File uploads/storage 1.3 Normal wontfix storage unicode normalization Accepted 0 0 0 0 0 0