def p_recheck_leanred_words(user):
"""
重新检查并计算给定用户的已学习生词的信息。
参数：
待重新检查的用户的 ID。
"""
with transaction.atomic():
LearnedWord.objects.all().delete()
question_dict = {}
for question in Question.objects.filter(user_id = user.id, answered = True):
if question.related_word_id not in question_dict:
question_dict[question.related_word_id] = []
question_dict[question.related_word_id].append(question)
for key, value in question_dict.items():
learned_word = LearnedWord(word_id = key, user_id = user.id)
learned_word.save()
value.sort(key = lambda q: q.answer_date)
unfamiliarity = 1
learned_word.learned_date = current_date = value[0].answer_date.date()
total_answered_count = 0
correct_answered_count = 0
for question in value:
time_delta = question.answer_date.date() - current_date
unfamiliarity = p_calculate_unfamiliarity_with_params(time_delta, unfamiliarity, correct_answered_count)
total_answered_count += 1
if question.answer_is_correct:
correct_answered_count += 1
unfamiliarity -= 1 / UNFAMILIARITY_COEFFICIENT
else:
unfamiliarity += 1 / UNFAMILIARITY_COEFFICIENT
unfamiliarity = p_bound_value(unfamiliarity, (0, 1))
current_date = question.answer_date.date()
learned_word.last_review_date = current_date
learned_word.total_answered_count = total_answered_count
learned_word.correct_answered_count = correct_answered_count
learned_word.unfamiliarity = unfamiliarity
learned_word.save()
