MultipleEchoIceField只提供选项,而不提供ManyToManyField

我有一个多回声冰场的问题,我无法保存它。

型号:

 class Companyd(models.Model):

 months_recurrence_options = (
    ("1", "Enero"),
    ("2", "Febrero"),
    ("3", "Marzo"),
    ("4", "Abril"),
    ("5", "Mayo"),
    ("6", "Junio"),
    ("7", "Julio"),
    ("8", "Julio"),
    ("9", "Septiembre"),
    ("10", "Octubre"),
    ("11", "Noviembre"),
    ("12", "Diciembre")
)


   months_recurrence=models.CharField(max_length=100,choices=months_recurrence_options, 
   blank=True,null=True)

形式:

 class CompanyFormAdmin(forms.ModelForm):

      months_recurrence = 
      forms.MultipleChoiceField(required=False,widget=forms.CheckboxSelectMultiple, 
      choices=Company.months_recurrence_options)

    class Meta:
      model = Company
      fields = [...
                 months_recurrence
                ...
               ]

意见

    form = CompanyFormAdmin(request.POST or None, request.FILES or None, instance=obj)

    if request.method == 'POST':

        if form.is_valid():
            form.save()

当我保存表单时,我遇到了以下问题:

{'months_recurrence':[ValidationError(['Escoja una opcin vlida.'5'、'7'、'10']没有可争议的选项])]