我想知道如何正确创建突变来创建这个 django 模型:
class Company(models.Model):
class Meta:
db_table = 'companies'
app_label = 'core'
default_permissions = ()
name = models.CharField(unique=True, max_length=50, null=False)
email = models.EmailField(unique=True, null=False)
phone_number = models.CharField(max_length=13, null=True)
address = models.TextField(max_length=100, null=False)
crn = models.CharField(max_length=20, null=False)
tax = models.CharField(max_length=20, null=False)
parent = models.ForeignKey('self', null=True, on_delete=models.CASCADE)
currency = models.ForeignKey(Currency, null=False, on_delete=models.CASCADE)
country = models.ForeignKey(Country, null=False, on_delete=models.CASCADE)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
如您所见,有三个外键。对于型号Currency, Country and 家长(本人). 公司 DjangoObjectType看起来很简单,如下所示:
class CompanyType(DjangoObjectType):
class Meta:
model = Company
最后是我的突变类创建公司 have Currency, Country and 自己(家长)定义为graphene.Field()
:
class CompanyInput(graphene.InputObjectType):
name = graphene.String(required=True)
email = graphene.String(required=True)
address = graphene.String(required=True)
crn = graphene.String(required=True)
tax = graphene.String(required=True)
currency = graphene.Field(CurrencyType)
country = graphene.Field(CountryType)
parent = graphene.Field(CompanyType)
phone_number = graphene.String()
class CreateCompany(graphene.Mutation):
company = graphene.Field(CompanyType)
class Arguments:
company_data = CompanyInput(required=True)
@staticmethod
def mutate(root, info, company_data):
company = Company.objects.create(**company_data)
return CreateCompany(company=company)
当我想启动 django 服务器时,会引发断言错误。
AssertionError: CompanyInput.currency field type must be Input Type but got: CurrencyType.
很长一段时间以来,我一直在寻找一些关于一对多外键的好教程,所以如果有人知道如何清晰地实现这个解决方案,我将非常高兴。
PS:请您也向我展示 GraphQL 查询的示例,以便我知道如何调用该突变?非常感谢。