Question

我有一个包含两个字段的表单，一个字段获取所选日期，另一个字段获取所选时间，这是我的表单：

      <input id="datepicker" class="form-control shadow-sm datepicker" name="date" type="text" 
                {%if meeting.pk%}
                    value="" data-value="{{meeting.date_time.date|date:'Y-m-d'}}"{%else%}
                    value=""  data-value="2021-02-14"{%endif%}
                    required>
                <div style="color: red;" class="invalid-feedback"></div>
            </div>
            <div class="col-6 pr-0">
                <input id="input_from" class="form-control shadow-sm timepicker" type="time" {%if meeting.pk%}
                    data-value="{{meeting.date_time.time}}" {%else%} data-value="Date" {%endif%} name="time" required>
                <div style="color: red;" class="invalid-feedback"></div>
            </div>

我需要在表单的init函数中取出这两个字段并将它们转换为一个datetime对象并保存在模型中，这是init函数：< /p>

class CreatMeetingForm(forms.ModelForm):

  date = forms.DateField(required=True)
  time = forms.TimeField(required=True, widget=forms.TimeInput(format='%H:%M'))


class Meta:
    model = Meeting
    fields = ['time_zone','title','members_email','date','time','description','lat','lng','meeting_photo','yelp_business_id','is_virtual','meeting_url','location_name','location_address']

    


def __init__ (self,data=None,*args , **kwargs):

    if data is not None :
        data = data.copy()
        date_field =data.get('date')
        time_field = data.get('time')
        date_time_filed = date_field+" "+time_field
        date_time = datetime.strptime(date_time_filed,'%Y/%m/%d %H:%M:')
        data['date_time'] = date_time
    super().__init__(data,*args,**kwargs)

但我收到此错误：

ValueError at /meeting/create-meeting/
time data '2021-02-2112:30' does not match format '%Y/%m/%d %H:%M:'
Traceback Switch to copy-and-paste view
/home/admin1/envs/myvenv/lib/python3.8/site-packages/django/core/handlers/exception.py, line 47, in inner
                response = get_response(request) …
▶ Local vars
/home/admin1/envs/myvenv/lib/python3.8/site-packages/django/core/handlers/base.py, line 181, in _get_response
                response = wrapped_callback(request, *callback_args, **callback_kwargs) …
▶ Local vars
/home/admin1/envs/myvenv/lib/python3.8/site-packages/django/contrib/auth/decorators.py, line 21, in _wrapped_view
                return view_func(request, *args, **kwargs) …
▶ Local vars
/home/admin1/website/meeting/views.py, line 83, in create_meeting
                form = CreatMeetingForm(request.POST,request.FILES) …
▶ Local vars
/home/admin1/website/meeting/forms.py, line 46, in __init__
            date_time = datetime.strptime(date_time_filed,'%Y/%m/%d %H:%M:') …
▶ Local vars
/usr/lib/python3.8/_strptime.py, line 568, in _strptime_datetime
    tt, fraction, gmtoff_fraction = _strptime(data_string, format) …
▶ Local vars
/usr/lib/python3.8/_strptime.py, line 349, in _strptime
        raise ValueError("time data %r does not match format %r" % …
▶ Local vars

我打印了从 data.get() 获得的日期和时间类型，它是字符串格式，这就是我尝试将其转换为日期时间的原因有什么建议吗？

Answer 1

显然 '2021-02-2112:30' 的格式字符串是 '%Y-%m-%d%H:%M'，而不是 '%Y/%m/%d %H:%M:'

>>> spam = '2021-02-2112:30'
>>> from datetime import datetime
>>> datetime.strptime(spam, '%Y-%m-%d%H:%M')
datetime.datetime(2021, 2, 21, 12, 30)

当然，您可以决定更改字符串。

将日期时间字符串转换为日期时间对象python

1 个答案: