def find_lowest_available_suffix(index_instance, document):
index_instance_documents = DocumentRenameCount.objects.filter(index_instance=index_instance).filter(document__file_extension=document.file_extension)
files_list = []
for index_instance_document in index_instance_documents:
files_list.append(assemble_document_filename(index_instance_document.document, index_instance_document.suffix))
for suffix in xrange(MAX_SUFFIX_COUNT):
if assemble_document_filename(document, suffix) not in files_list:
return suffix
raise MaxSuffixCountReached(ugettext(u'Maximum suffix (%s) count reached.') % MAX_SUFFIX_COUNT)
def fs_create_document_link(index_instance, document, suffix=0):
if FILESERVING_ENABLE:
name_part = assemble_document_filename(document, suffix)
filename = os.extsep.join([name_part, document.file_extension])
filepath = os.path.join(FILESERVING_PATH, get_instance_path(index_instance), filename)
try:
os.symlink(document.file.path, filepath)
except OSError, exc:
if exc.errno == errno.EEXIST:
# This link should not exist, try to delete it
try:
os.unlink(filepath)
# Try again
os.symlink(document.file.path, filepath)
except Exception, exc:
raise Exception(_(u'Unable to create symbolic link, file exists and could not be deleted: %(filepath)s; %(exc)s') % {'filepath': filepath, 'exc': exc})
else:
raise Exception(_(u'Unable to create symbolic link: %(filepath)s; %(exc)s') % {'filepath': filepath, 'exc': exc})