graphene-python无法识别“ content_type”字段

Question

我正在首次尝试使用“ graphene-python”，到目前为止，我已经能够使用它，但是我发现“ graphene-python”无法识别 ForeignKey 引用 ContentType 模型的字段。

这是我的模特

class ReservationComponent(models.Model):
    reservation = models.ForeignKey(Reservation, on_delete=models.PROTECT, related_name='components', verbose_name=_("Reservation"))
    dertour_bk = models.CharField(null=True, blank=True, max_length=15, verbose_name=_("Dertour Bk"))
    day = models.DateField(verbose_name=_('Day'))
    content_type = models.ForeignKey(ContentType, on_delete=models.PROTECT)
    object_id = models.PositiveIntegerField()
    content_object = GenericForeignKey('content_type', 'object_id')
    comment = models.TextField(null=True, blank=True, verbose_name=_("Comment"))
    is_invoiced = models.BooleanField(default=False, verbose_name=_("Is Invoiced"))

这是我的 schemas.py ：

import graphene
from graphene_django.types import DjangoObjectType
from ReservationsManagerApp.models import Reservation, ReservationComponent
from InvoicesManagerApp.models import Invoice, InvoiceEntry, InvoiceEntryComponent
from PaymentsManagerApp.models import Payment, PaymentReservationComponent

class ReservationType(DjangoObjectType):
    class Meta:
        model = Reservation

class ReservationComponentType(DjangoObjectType):
    class Meta:
        model = ReservationComponent

class InvoiceType(DjangoObjectType):
    class Meta:
        model = Invoice

class InvoiceEntryType(DjangoObjectType):
    class Meta:
        model = InvoiceEntry

class InvoiceEntryComponentType(DjangoObjectType):
    class Meta:
        model = InvoiceEntryComponent

class PaymentType(DjangoObjectType):
    class Meta:
        model = Payment

class PaymentReservationComponentType(DjangoObjectType):
    class Meta:
        model = PaymentReservationComponent

class  Query(object):
    all_reservations = graphene.List(ReservationType)
    all_reservation_components = graphene.List(ReservationComponentType)
    all_invoices = graphene.List(InvoiceType)
    all_invoice_components = graphene.List(InvoiceEntryType)
    all_invoice_entries_components = graphene.List(InvoiceEntryComponentType)
    all_payment = graphene.List(PaymentType)
    all_payment_reservation_components = graphene.List(PaymentReservationComponentType)

    def resolve_all_reservations(self, info, **kwargs):
        return Reservation.objects.all()

    def resolve_all_reservation_components(self, info, **kwargs):
        return ReservationComponent.objects.select_related('reservation').all()

    def resolve_all_invoice_entries_components(self, info, **kwargs):
        return InvoiceEntryComponent.objects.select_related('reservation_component').all()

    def resolve_all_payment_reservation_components(self, info, **kwargs):
        return PaymentReservationComponent.objects.select_related('reservation_component').all()

并且，在此图像中，您可以看到 graphene-python 不接受模型“ ReservationComponent”的字段“ content_type”，即使该模型中存在该字段也是如此。

我不知道我是否缺少任何设置或其他东西。

Answer 1

这是因为您没有django的DjangoObjectType模型的ContentType。

您可以通过创建它，

from graphene_django import DjangoObjectType
from django.contrib.contenttypes.models import ContentType

class ContentObjectType(DjangoObjectType):

    class Meta:
        model = ContentType

根据documentation，您必须为子类DjangoObjectType的每个模型创建一个类型。