time.Duration在Go中解组的惯用方法是什么?我该如何使用time.ParseDuration?
此单元测试失败,但以下情况除外:
def test_vote_form_with_multiple_choices_allowed_and_submitted(self):
"""
If multiple choices are allowed and submitted, the form should be valid.
"""
vote_form = VoteForm({'choice': [1, 2]}, instance=create_question('Dummy question', -1,
[Choice(choice_text='First choice'), Choice(
choice_text='Second choice')],
allow_multiple_choices=True))
self.assertTrue(vote_form.is_valid())
self.assertQuerysetEqual(vote_form.cleaned_data['choice'], ['<Choice: First choice>', '<Choice: Second choice>'])
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ValueError:尝试将非有序查询集与多个有序值进行比较我做错了什么?
我写了一个动态表格:
class VoteForm(forms.Form):
def __init__(self, *args, **kwargs):
question = kwargs.pop('instance', None)
super().__init__(*args, **kwargs)
if question:
if question.allow_multiple_votes:
choice_field = forms.ModelMultipleChoiceField(queryset=question.choice_set)
else:
choice_field = forms.ModelChoiceField(queryset=question.choice_set)
choice_field.widget = forms.RadioSelect
choice_field.label=False
choice_field.empty_label=None
choice_field.error_messages={'required': _('No choice selected.'),
'invalid': _('Invalid choice selected.')}
self.fields['choice'] = choice_field
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没有RadioSelect窗口小部件,一切似乎都可以正常工作,但是使用它,会发生以下错误:
TypeError:use_required_attribute()缺少1个必需的位置参数:“ initial”
以下网址定义应该传递是否results/存在于网址中:
url(r'^(?P<question_id>[0-9]+)/(?P<results>(results/)?)shorten/$', views.shorten, name='shorten')
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目前它通过results/或None足够简单:
if results:
pass
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但拥有True和更优雅False.怎么可以这样做?
有没有办法防止烧瓶设置缓存标头send_file或我是否必须手动操作它们?
如何确保=运算符始终不区分大小写?与LOWER或UPPER函数进行比较是提高性能的最佳选择吗?ILIKE似乎很慢。
enc := json.NewEncoder(w)
err := enc.Encode(struct {
Method string `json:"method"`
Results []interface{} `json:"results"`
CacheTime int `json:"cache_time"`
}{Method: answerInlineQueryMethod, Results: results, CacheTime: 0})
if err != nil {
log.Printf("failed to answer to inline query: %s", err)
}
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我如何区分应该导致恐慌的JSON错误和发送响应导致的错误,哪些应该记录?
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