django - Django：持续时间

Question

目前，我使用django 1.4.8，我的模型中有以下两个字段：

class Event(models.Model):
...
    start = models.DateTimeField(_(u"départ"))
    end = models.DateTimeField(_('fin'))

我试图添加一个字段来指示时间的持续时间

     start = models.DateTimeField(_(u"départ"))
     time_delay = models.TimeField(_(u"Time_delay"), auto_now_add=True, blank=True, default=datetime.datetime.utcnow)

但我在管理员中收到错误

'EventAdmin.fieldsets[0][1]['fields']' refers to field 'time_delay' that is missing from the form

我的管理员：

class EventAdmin(admin.ModelAdmin):

list_display = ('title', 'start', 'contact_time', 'user', 'fin', 'frequency', 'one_file_',)

fieldsets = (
    (None, {
        'fields': ('title','start', 'contact_time', 'is_cancelled', 'calendar', 'user', 'description', ('frequency', 'fin' ), 'activated', 'one_file',)
    }),
)

……

这是什么问题

Answer 1

您设置auto_now_add = True了 time_delay 字段，因此 django 不会将此字段添加到表单中

class EventAdmin(admin.ModelAdmin):

    list_display = ('title', 'start', 'contact_time', 'user', 'fin', 'frequency', 'one_file_',)

    fieldsets = (
    (None, {
        'fields': ('title','start', 'contact_time', 'is_cancelled', 'calendar', 'user', 'description', ('frequency', 'fin' ), 'activated', 'one_file',)
    }),
)
    readonly_fields = ("time_delay",)