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})