Question

我正在网上做教程，并尝试让mutation在graphql上运行，但我一直在收到错误，我不知道真正的错误来自何处以及如何开始调试做错了。

看着这个youtube突变 https://www.youtube.com/watch?v=aB6c7UUMrPo&t=1962s 和石墨烯文件http://docs.graphene-python.org/en/latest/types/mutations/

我注意到由于石墨烯版本不同，这就是为什么我阅读文档而不是完全按照youtube

我设置了一些东西，但是当它执行变异查询时我无法正常工作，我得到了错误。

我有这样的模特。

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schema

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()

全局架构看起来像这样

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)

尝试查询...这是我的查询

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

错误返回

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

有人可以帮我看看我应该尝试做些什么吗？

提前感谢您提供任何帮助

Answer 1

想出我自己的问题。

有三件事，Argument应该是Arguments，在mutate函数下，我应该使用常规的django创建模型，所以从product = Product(barcode=barcode)到{{{ 1}}最后但并非最不重要product = Product.objects.create(barcode=barcode)应为class ProductMutation(graphene.AbstractType):

所以代码应该是

class ProductMutation(graphene.ObjectType):

变异错误，未知参数\＆＃34;条形码\＆＃34; on field \＆＃34; createProduct \＆＃34;类型\＆＃34; Mutation \＆＃34; - django

1 个答案: