Question

此表单旨在从视图中的用户处获得答案，并且在提交表单时，用户答案应与correct_answer变量匹配以传递和更正。但即使用户输入正确答案，表格也会显示错误。我做错了什么？

Default.py

def practice_game():

    import random
    db_length = db(db.verb.id > 0).count()
    verb = db().select(db.verb.ALL,orderby='<random>',limitby= (0,1))[0]
    random_int = random.randint(1,6)
    global correct_answer
    tense = 'present'
    if random_int == 1:
        correct_answer = str(verb.verb_present_je)
    elif random_int == 2:
        correct_answer = str(verb.verb_present_tu)
    elif random_int == 3:
        correct_answer = str(verb.verb_present_il)
    elif random_int == 4:
        correct_answer = str(verb.verb_present_nous)
    elif random_int == 5:
        correct_answer = str(verb.verb_present_vous)
    else:
        correct_answer = str(verb.verb_present_ils)

    form=FORM('Your answer:',
              INPUT(_name='user_answer', requires=IS_EQUAL_TO(correct_answer)),
              INPUT(_type='submit'))
    if form.accepts(request,session):
        response.flash = 'form accepted'
    elif form.errors:
        response.flash = 'form has errors'
    else:
        response.flash = 'please fill the form'
    return dict(form=form, counter=session.counter, correct_answer=correct_answer, verb=verb, tense=tense, pronoun=pronoun, current_user=auth.user.first_name)

Answer 1

表单是自提交的，因此操作被调用两次 - 一次加载空白表单时，再次提交表单时。在每次通话时，您都会生成一个新的随机正确答案。最初显示在页面上的正确答案（您最终输入表单并提交）不一定与提交表单时生成（和验证）的正确答案相同（它们应该匹配六分之一的时间）偶然）。

要避免此问题，您可以在会话中存储初始正确答案，并将其用于验证：

form=FORM('Your answer:',
          INPUT(_name='user_answer',
                requires=IS_EQUAL_TO(session.correct_answer)),
          INPUT(_type='submit'))
if form.accepts(request,session):
    response.flash = 'form accepted'
elif form.errors:
    response.flash = 'form has errors'
else:
    response.flash = 'please fill the form'
session.correct_answer = correct_answer

为什么表单显示错误？

1 个答案: