如何在Django省下许多油田？

我有这样的模型：

class GuestStatus(models.Model):
    guest_status = models.CharField(max_length=200)
    arrangement = models.IntegerField(unique=True, help_text="Start from 1. Guest status will be arranged alphabetically.")


class Guest(models.Model):
    user = models.ForeignKey(User)
    full_name = models.CharField(max_length=250)
    status = models.ManyToManyField(GuestStatus, blank=True, null=True)
    invitation_date = models.DateTimeField(blank=True, null=True)

class GuestForm(ModelForm):
    status = forms.ModelMultipleChoiceField(queryset=GuestStatus.objects.all().order_by('arrangement'), widget=forms.CheckboxSelectMultiple, required=False)
    class Meta:
        model = Guest
        exclude = ['user', 'invitation_date']

    form = GuestForm(request.POST)
    if form.is_valid():
        status = form.cleaned_data['status']
        guest.status = status
        if status:
            invitation_date = datetime.now() 
        else:
            invitation_date = None
        new_guest = form.save(commit=False)

        new_guest.user = request.user
        new_guest.save()
        new_guest.status = status
        form.save_m2m()

        return HttpResponseRedirect('/list_guests/')

form = GuestForm(request.POST)
if form.is_valid():
    if status:
        invitation_date = datetime.now() 
    else:
        invitation_date = None

    new_guest = form.save(commit=False)
    new_guest.user = request.user
    new_guest.save()

    status = form.cleaned_data['status']
    for stat in status:
        new_guest.status_set.create(guest_status = stat['guest_status'], arrangement = stat['arrangement'])

    return HttpResponseRedirect('/list_guests/')

我希望

ManyToManyField

显示为复选框。这就是为什么我要这样做：

class GuestStatus(models.Model):
    guest_status = models.CharField(max_length=200)
    arrangement = models.IntegerField(unique=True, help_text="Start from 1. Guest status will be arranged alphabetically.")


class Guest(models.Model):
    user = models.ForeignKey(User)
    full_name = models.CharField(max_length=250)
    status = models.ManyToManyField(GuestStatus, blank=True, null=True)
    invitation_date = models.DateTimeField(blank=True, null=True)

class GuestForm(ModelForm):
    status = forms.ModelMultipleChoiceField(queryset=GuestStatus.objects.all().order_by('arrangement'), widget=forms.CheckboxSelectMultiple, required=False)
    class Meta:
        model = Guest
        exclude = ['user', 'invitation_date']

    form = GuestForm(request.POST)
    if form.is_valid():
        status = form.cleaned_data['status']
        guest.status = status
        if status:
            invitation_date = datetime.now() 
        else:
            invitation_date = None
        new_guest = form.save(commit=False)

        new_guest.user = request.user
        new_guest.save()
        new_guest.status = status
        form.save_m2m()

        return HttpResponseRedirect('/list_guests/')

form = GuestForm(request.POST)
if form.is_valid():
    if status:
        invitation_date = datetime.now() 
    else:
        invitation_date = None

    new_guest = form.save(commit=False)
    new_guest.user = request.user
    new_guest.save()

    status = form.cleaned_data['status']
    for stat in status:
        new_guest.status_set.create(guest_status = stat['guest_status'], arrangement = stat['arrangement'])

    return HttpResponseRedirect('/list_guests/')

我正试图这样保存表单：

class GuestStatus(models.Model):
    guest_status = models.CharField(max_length=200)
    arrangement = models.IntegerField(unique=True, help_text="Start from 1. Guest status will be arranged alphabetically.")


class Guest(models.Model):
    user = models.ForeignKey(User)
    full_name = models.CharField(max_length=250)
    status = models.ManyToManyField(GuestStatus, blank=True, null=True)
    invitation_date = models.DateTimeField(blank=True, null=True)

class GuestForm(ModelForm):
    status = forms.ModelMultipleChoiceField(queryset=GuestStatus.objects.all().order_by('arrangement'), widget=forms.CheckboxSelectMultiple, required=False)
    class Meta:
        model = Guest
        exclude = ['user', 'invitation_date']

    form = GuestForm(request.POST)
    if form.is_valid():
        status = form.cleaned_data['status']
        guest.status = status
        if status:
            invitation_date = datetime.now() 
        else:
            invitation_date = None
        new_guest = form.save(commit=False)

        new_guest.user = request.user
        new_guest.save()
        new_guest.status = status
        form.save_m2m()

        return HttpResponseRedirect('/list_guests/')

form = GuestForm(request.POST)
if form.is_valid():
    if status:
        invitation_date = datetime.now() 
    else:
        invitation_date = None

    new_guest = form.save(commit=False)
    new_guest.user = request.user
    new_guest.save()

    status = form.cleaned_data['status']
    for stat in status:
        new_guest.status_set.create(guest_status = stat['guest_status'], arrangement = stat['arrangement'])

    return HttpResponseRedirect('/list_guests/')

---

表单正在保存所有数据，但不保存

状态

值。怎么了？另外，成功保存后，如何访问模板中的状态值？谢谢

我会这样做：

class GuestStatus(models.Model):
    guest_status = models.CharField(max_length=200)
    arrangement = models.IntegerField(unique=True, help_text="Start from 1. Guest status will be arranged alphabetically.")


class Guest(models.Model):
    user = models.ForeignKey(User)
    full_name = models.CharField(max_length=250)
    status = models.ManyToManyField(GuestStatus, blank=True, null=True)
    invitation_date = models.DateTimeField(blank=True, null=True)

class GuestForm(ModelForm):
    status = forms.ModelMultipleChoiceField(queryset=GuestStatus.objects.all().order_by('arrangement'), widget=forms.CheckboxSelectMultiple, required=False)
    class Meta:
        model = Guest
        exclude = ['user', 'invitation_date']

    form = GuestForm(request.POST)
    if form.is_valid():
        status = form.cleaned_data['status']
        guest.status = status
        if status:
            invitation_date = datetime.now() 
        else:
            invitation_date = None
        new_guest = form.save(commit=False)

        new_guest.user = request.user
        new_guest.save()
        new_guest.status = status
        form.save_m2m()

        return HttpResponseRedirect('/list_guests/')

form = GuestForm(request.POST)
if form.is_valid():
    if status:
        invitation_date = datetime.now() 
    else:
        invitation_date = None

    new_guest = form.save(commit=False)
    new_guest.user = request.user
    new_guest.save()

    status = form.cleaned_data['status']
    for stat in status:
        new_guest.status_set.create(guest_status = stat['guest_status'], arrangement = stat['arrangement'])

    return HttpResponseRedirect('/list_guests/')

获取

new\u guest

实例后，创建

GuestStatus

实例并将其绑定到

new\u guest

如果

GuestStatus

是您的字典，您可以：

    for stat in status:
        gs = GuestStatus.objects.get(pk = stat['guest_status'])
        new_guest.status_set.add(gs)

---

希望你能理解我和我的英语：）

因为你保存了

new\u guest.status=status

之后，如果我写

new\u guest.status=status

之后

new\u guest.user=request.user

之后再做

new\u guest.save（）

我得到这个错误：

“需要为字段设置一个值”guest“在使用此多对多关系之前

如果表单具有

状态

字段，则无需将其显式设置为

新建\u guest.status=status

，而只需执行

表单。保存\u m2m（）

。已执行。仍不工作：（

“Guest”对象在保存时没有属性“status\u set”

错误！您使用的是什么django版本？