Python 变异错误，未知参数\“；条形码\“；关于字段\“；createProduct\"；类型\"；突变\"；-德扬戈

我在网上做教程，试图让

变异

在

图形ql

上工作，但我不断地出错，我不知道真正的错误来自哪里，也不知道如何开始调试我做错的地方

在youtube上寻找突变 和石墨烯文档

我注意到，由于石墨烯版本不同，这就是为什么我要阅读文档，而不是完全按照

youtube

我设置了一些东西，但无法让它工作，当我执行变异查询时，我得到了错误

我有一个这样的模型

class Product(models.Model):
    sku = models.CharField(max_length=13, help_text="Enter Product Stock Keeping Unit", null=True, blank=True)
    barcode = models.CharField(max_length=13, help_text="Enter Product Barcode (ISBN, UPC ...)", null=True, blank=True)

    title = models.CharField(max_length=200, help_text="Enter Product Title", null=True, blank=True)
    description = models.TextField(help_text="Enter Product Description", null=True, blank=True)

    unitCost = models.FloatField(help_text="Enter Product Unit Cost", null=True, blank=True)
    unit = models.CharField(max_length=10, help_text="Enter Product Unit ", null=True, blank=True)

    quantity = models.FloatField(help_text="Enter Product Quantity", null=True, blank=True)
    minQuantity = models.FloatField(help_text="Enter Product Min Quantity", null=True, blank=True)

    family = models.ForeignKey('Family', null=True, blank=True)
    location = models.ForeignKey('Location', null=True, blank=True)

    def __str__(self):
        return self.title

我的产品有这个

模式

class ProductType(DjangoObjectType):
    class Meta:
        model = Product
        filter_fields = {'description': ['icontains']}
        interfaces = (graphene.relay.Node,)


class CreateProduct(graphene.Mutation):
    class Argument:
        barcode = graphene.String()

    # form_errors = graphene.String()
    product = graphene.Field(lambda: ProductType)

    def mutate(self, info, barcode):
        product = Product(barcode=barcode)
        return CreateProduct(product=product)


class ProductMutation(graphene.AbstractType):
    create_product = CreateProduct.Field()

class ProductQuery(object):
    product = relay.Node.Field(ProductType)
    all_products = DjangoFilterConnectionField(ProductType)

    def resolve_all_products(self, info, **kwargs):
        return Product.objects.all()

全局模式如下所示

class Mutation(ProductMutation,
               graphene.ObjectType):
    pass


class Query(FamilyQuery,
            LocationQuery,
            ProductQuery,
            TransactionQuery,

            graphene.ObjectType):
    # This class extends all abstract apps level Queries and graphene.ObjectType
    pass


allGraphQLSchema = graphene.Schema(query=Query, mutation=Mutation)

至于尝试查询…这是我的查询

mutation ProductMutation {
  createProduct(barcode:"abc"){
    product {
      id, unit, description
    }
  }
}

返回的错误

{
  "errors": [
    {
      "message": "Unknown argument \"barcode\" on field \"createProduct\" of type \"Mutation\".",
      "locations": [
        {
          "column": 17,
          "line": 2
        }
      ]
    }
  ]
}

谁能帮我一下我该怎么做

---

提前感谢您的帮助

解决了我自己的问题

有三件事，它们是

Argument

应该是

Arguments

并且在

mutate

函数下，我应该使用常规的django创建模型，以便从

product=product（barcode=barcode）

到

product=product.objects.create（barcode=barcode）

最后但并非最不重要的

class-ProductMutation（graphene.AbstractType）：

应该是

类product（graphene.ObjectType）：

所以代码应该是

class ProductType(DjangoObjectType):
    class Meta:
        model = Product
        filter_fields = {'description': ['icontains']}
        interfaces = (graphene.relay.Node,)


class CreateProduct(graphene.Mutation):
    class Arguments:    # change here
        barcode = graphene.String()

    product = graphene.Field(lambda: ProductType)

    def mutate(self, info, barcode):
        # change here
        # somehow the graphene documentation just state the code I had in my question which doesn't work for me.  But this one does
        product = Product.objects.create(barcode=barcode)
        return CreateProduct(product=product)


class ProductMutation(graphene.ObjectType):  # change here
    create_product = CreateProduct.Field()

class ProductQuery(object):
    product = relay.Node.Field(ProductType)
    all_products = DjangoFilterConnectionField(ProductType)

    def resolve_all_products(self, info, **kwargs):
        return Product.objects.all()

---

我解决了自己的问题

有三件事，它们是

Argument

应该是

Arguments

并且在

mutate

函数下，我应该使用常规的django创建模型，以便从

product=product（barcode=barcode）

到

product=product.objects.create（barcode=barcode）

最后但并非最不重要的

class-ProductMutation（graphene.AbstractType）：

应该是

类product（graphene.ObjectType）：

所以代码应该是

class ProductType(DjangoObjectType):
    class Meta:
        model = Product
        filter_fields = {'description': ['icontains']}
        interfaces = (graphene.relay.Node,)


class CreateProduct(graphene.Mutation):
    class Arguments:    # change here
        barcode = graphene.String()

    product = graphene.Field(lambda: ProductType)

    def mutate(self, info, barcode):
        # change here
        # somehow the graphene documentation just state the code I had in my question which doesn't work for me.  But this one does
        product = Product.objects.create(barcode=barcode)
        return CreateProduct(product=product)


class ProductMutation(graphene.ObjectType):  # change here
    create_product = CreateProduct.Field()

class ProductQuery(object):
    product = relay.Node.Field(ProductType)
    all_products = DjangoFilterConnectionField(ProductType)

    def resolve_all_products(self, info, **kwargs):
        return Product.objects.all()