Ignore:
Timestamp:
15 May 2012, 15:24:11 (12 years ago)
Author:
uli
Message:

Finetune media file distributions for students a bit: make sure that for lower numbers 10,000 numbers share a path.

Location:
main/waeup.kofa/trunk/src/waeup/kofa/students
Files:
2 edited

Legend:

Unmodified
Added
Removed
  • main/waeup.kofa/trunk/src/waeup/kofa/students/student.py

    r8448 r8452  
    189189    Returns the name of folder in which files for a particular student
    190190    should be stored. This is a relative path, relative to any general
    191     students folder.
    192 
    193     For instance ``K1000000`` will give ``01000/K1000000`` and
    194     ``KM123456`` will result in ``00123/KM123456``.
     191    students folder with 5 zero-padded digits (except when student_id
     192    is overlong).
     193
     194    We normally map 1,000 different student ids into one single
     195    path. For instance ``K1000000`` will give ``01000/K1000000``,
     196    ``K1234567`` will give ``0123/K1234567`` and ``K12345678`` will
     197    result in ``1234/K12345678``.
     198
     199    For lower numbers < 10**6 we return the same path for up to 10,000
     200    student_ids. So for instance ``KM123456`` will result in
     201    ``00120/KM123456`` (there will be no path starting with
     202    ``00123``).
     203
     204    Works also with overlong number: here the leading zeros will be
     205    missing but ``K123456789`` will give reliably
     206    ``12345/K123456789`` as expected.
    195207    """
    196208    # remove all non numeric characters and turn this into an int.
    197209    num = int(RE_STUDID_NON_NUM.sub('', student_id))
    198     # store max. of 1000 studs per folder
    199     folder_name = u'%05d' % (num / 1000)
     210    if num < 10**6:
     211        # store max. of 10000 studs per folder and correct num for 5 digits
     212        num = num / 10000 * 10
     213    else:
     214        # store max. of 1000 studs per folder
     215        num = num / 1000
     216    # format folder name to have 5 zero-padded digits
     217    folder_name = u'%05d' % num
    200218    folder_name = os.path.join(folder_name, student_id)
    201219    return folder_name
  • main/waeup.kofa/trunk/src/waeup/kofa/students/tests/test_student.py

    r8448 r8452  
    4949            path_from_studid('K1000000'), u'01000/K1000000')
    5050        self.assertEqual(
    51             path_from_studid('KM123456'), u'00123/KM123456')
     51            path_from_studid('K1234567'), u'01234/K1234567')
     52        self.assertEqual(
     53            path_from_studid('K12345678'), u'12345/K12345678')
     54        # The algorithm works also for overlong numbers, just to be
     55        # sure.
     56        self.assertEqual(
     57            path_from_studid('K123456789'), u'123456/K123456789')
     58        # low numbers (< 10**6) are treated special: they get max. of
     59        # 10,000 entries. That's mainly because of old students
     60        # migrated into our portal.
     61        self.assertEqual(
     62            path_from_studid('KM123456'), u'00120/KM123456')
    5263        return
    5364
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