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我有一个自定义表单表单注册，在 modelChoiceField 上引用“类别”模型。当我尝试提交它时，它无法获取对模型的引用并引发以下错误：

“categorie_id”列中 /marketplace/signsupplier/ 空值的 IntegrityError 违反非空约束 详细信息：失败行包含 (55, , , , , , null)。

好像它丢失了所有发布的数据，但我可以在调试中看到 categorie_id 在 POST 数据中很好地传递。

这是我的 model.py ：

class Supplier(models.Model):
        phone_regex     = RegexValidator(regex=r'^(87|89)\d{6}$', message="Entrez un numéro de portable Polynésien valide")
        user            = models.OneToOneField(User, on_delete=models.CASCADE, primary_key=True)
        enseigne        = models.CharField(max_length=128, blank=False, null=False)
        vini            = models.CharField(verbose_name="Vini",validators=[phone_regex], max_length=8, blank=False, null=False)
        numero_tahiti   = models.CharField(max_length=9, blank=False, null=False)
        immat_rcs       = models.CharField(max_length=9, blank=False, null=False)
        categorie       = models.ForeignKey(Categorie, on_delete=models.DO_NOTHING)
        labels          = models.CharField(max_length=128)

我的forms.py：

class SignupSupplierForm(UserCreationForm):
        email           = forms.EmailField(required=True)
        first_name      = forms.CharField(required=True,label="Prenom")
        last_name       = forms.CharField(required=True,label="Nom")
        vini            = forms.CharField(required=True, max_length=8,validators=[phone_regex])
        enseigne        = forms.CharField(required=True, max_length=128, label="Enseigne")
        numero_tahiti   = forms.CharField(required=True, max_length=9, label="Numéro Tahiti")
        immat_rcs       = forms.CharField(required=True, max_length=9, label="Immatriculation RCS")
        categorie       = forms.ModelChoiceField(required=False,queryset=Categorie.objects.all())
        labels          = forms.CharField(required=False,max_length=128, label="Labels (option)")

        class Meta(UserCreationForm.Meta):
                model = User
                fields = ('email','first_name','last_name')

        @transaction.atomic
        def save(self):
                user = super().save(commit=False)
                user.is_supplier = True
                user.save()
                supplier = Supplier.objects.create(user=user)
                supplier.vini = self.cleaned_data.get('vini')
                supplier.enseigne = self.cleaned_data.get('enseigne')
                supplier.numero_tahiti = self.cleaned_data.get('numero_tahiti')
                supplier.immat_rcs = self.cleaned_data.get('immat_rcs')
                supplier.categorie = self.cleaned_data['categorie'].id
                supplier.labels = self.cleaned_data.get('labels')
                supplier.save()
                return user

和views.py

class SignupSupplierView(CreateView):
        model           = User
        form_class      = SignupSupplierForm
        success_url     = reverse_lazy('home')
        template_name   = 'signup.html'

        def get_context_data(self, **kwargs):
                return super().get_context_data(**kwargs)

        def form_valid(self, form):
                user = form.save()
                login(self.request, user)
                return HttpResponseRedirect(self.success_url)

我知道这是“类别”字段的问题，但不知道如何使 ot 工作。

如所问，这是调试面板中 POST 数据的内容：

Variable             Value
csrfmiddlewaretoken  'TGTAW...qn17h'
email                'testfour@test.com'
first_name           'pre four'
last_name            'nom four'
password1            'test456'
password2            'test456'
vini                 '87740921'
enseigne             'ens four'
numero_tahiti        '123456789'
immat_rcs            '123456789'
categorie            '2'
labels      'test'

我还使用日志记录功能来获取有关错误的更多信息，我得到了这个。也许它可以帮助：

(0.001) DECLARE "_django_curs_139721501058880_sync_1" NO SCROLL CURSOR WITH HOLD FOR SELECT "ELIEN_CORE_categorie"."id", "ELIEN_CORE_categorie"."categorie", "ELIEN_CORE_categorie"."timestamp", "ELIEN_CORE_categorie"."updated" FROM "ELIEN_CORE_categorie"; args=()
Exception while resolving variable 'object_list' in template 'signup.html'.

然后，再进一步：

Traceback (most recent call last):
  File "/home/max/elien_dev/elien/lib/python3.8/site-packages/django/template/base.py", line 848, in _resolve_lookup
    raise VariableDoesNotExist("Failed lookup for key "
django.template.base.VariableDoesNotExist: Failed lookup for key [mapbox_key] in [{'True': True, 'False': False, 'None': None}, {'csrf_token': <SimpleLazyObject: '96lE9Cepu2rqn5MbTGqtqmLdsz0LY1dGodSUIsOlqhU1bMj78EZzmLryqI8o7bkU'>, 'request': <WSGIRequest: GET '/marketplace/signsupplier/'>, 'user': <SimpleLazyObject: <django.contrib.auth.models.AnonymousUser object at 0x7f1cee9b9850>>, 'perms': <django.contrib.auth.context_processors.PermWrapper object at 0x7f1cee92d580>, 'messages': <django.contrib.messages.storage.fallback.FallbackStorage object at 0x7f1ceea002e0>, 'DEFAULT_MESSAGE_LEVELS': {'DEBUG': 10, 'INFO': 20, 'SUCCESS': 25, 'WARNING': 30, 'ERROR': 40}}, {}, {'form': <SignupSupplierForm bound=False, valid=False, fields=(email;first_name;last_name;password1;password2;vini;enseigne;numero_tahiti;immat_rcs;categorie;labels)>, 'view': <ELIEN_MARKETPLACE.views.SignupSupplierView object at 0x7f1ceea00370>}, {}]
(0.001) SELECT "ELIEN_CORE_categorie"."id", "ELIEN_CORE_categorie"."categorie", "ELIEN_CORE_categorie"."timestamp", "ELIEN_CORE_categorie"."updated" FROM "ELIEN_CORE_categorie" WHERE "ELIEN_CORE_categorie"."id" = 3 LIMIT 21; args=(3,)
(0.001) SELECT (1) AS "a" FROM "ELIEN_CORE_user" WHERE "ELIEN_CORE_user"."email" = 'testfour@test.com' LIMIT 1; args=('testfour@test.com',)
(0.001) INSERT INTO "ELIEN_CORE_user" ("password", "last_login", "is_superuser", "first_name", "last_name", "is_staff", "is_active", "date_joined", "email", "email_confirmed", "is_client", "is_supplier") VALUES ('p...w=', NULL, false, 'pre four', 'nom four', false, true, '2020-12-08T07:04:56.897584+00:00'::timestamptz, 'testfour@test.com', false, false, true) RETURNING "ELIEN_CORE_user"."id"; args=('p...=', None, False, 'pre four', 'nom four', False, True, datetime.datetime(2020, 12, 8, 7, 4, 56, 897584, tzinfo=<UTC>), 'testfour@test.com', False, False, True)
(0.001) INSERT INTO "ELIEN_MARKETPLACE_supplier" ("user_id", "enseigne", "vini", "numero_tahiti", "immat_rcs", "categorie_id", "labels") VALUES (63, '', '', '', '', NULL, ''); args=(63, '', '', '', '', None, '')
(0.000) SELECT "ELIEN_MARKETPLACE_supplier"."user_id", "ELIEN_MARKETPLACE_supplier"."enseigne", "ELIEN_MARKETPLACE_supplier"."vini", "ELIEN_MARKETPLACE_supplier"."numero_tahiti", "ELIEN_MARKETPLACE_supplier"."immat_rcs", "ELIEN_MARKETPLACE_supplier"."categorie_id", "ELIEN_MARKETPLACE_supplier"."labels" FROM "ELIEN_MARKETPLACE_supplier" LIMIT 21; args=()
(0.000) SELECT "ELIEN_MARKETPLACE_supplier"."user_id", "ELIEN_MARKETPLACE_supplier"."enseigne", "ELIEN_MARKETPLACE_supplier"."vini", "ELIEN_MARKETPLACE_supplier"."numero_tahiti", "ELIEN_MARKETPLACE_supplier"."immat_rcs", "ELIEN_MARKETPLACE_supplier"."categorie_id", "ELIEN_MARKETPLACE_supplier"."labels" FROM "ELIEN_MARKETPLACE_supplier" LIMIT 21; args=()
Internal Server Error: /marketplace/signsupplier/
Traceback (most recent call last):
  File "/home/max/elien_dev/elien/lib/python3.8/site-packages/django/db/backends/utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
psycopg2.errors.NotNullViolation: null value in column "categorie_id" violates not-null constraint
DETAIL:  Failing row contains (63, , , , , , null).

谢谢你的帮助 ！

4

1 回答 1

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问题来了，

supplier.categorie = self.cleaned_data['categorie'].id

self.cleaned_data['categorie'] 本身包含categorie实例的id，所以不需要做

supplier.categorie = self.cleaned_data['categorie'].id

只是

 supplier.categorie = self.cleaned_data['categorie']
于 2020-12-07T09:23:39.247 回答