GraphQL类型的期望值，但得到模型

Question

我想通过使用Altair和GraphQl显示Vendor 。 但是，当我尝试执行此操作时，出现错误：

 Expected value of type "ProductsManagement.Core.Ingredients.GraphQL.Types.IngredientType" for "Ingredient" but got: "ProductsManagement.Core.Ingredients.Models.IngredientType" 

听不懂，怎么了。

供应商服务

    public Vendor GetVendor(long id, long networkId)
    {
        if (networkId == default)
            throw new ExecutionError(Constants.ErrorCodes.NetworkIdNotSpecified);

        var vendor = _repository.First<Vendor>(
                                    e => e.Id == id,
                                    e => e.Include(i => i.Managers)
                                          .Include(i => i.VendorIngredientTypes)
                                          .ThenInclude(i => i.IngredientType).ThenInclude(i => i.IngredientItems));

        if (vendor == null || vendor.NetworkId != networkId)
            throw new ExecutionError(Constants.ErrorCodes.VendorNotFound);

        return vendor;
    }

供应商类型

public class VendorType : ObjectGraphType<Vendor>
{
    public VendorType()
    {
        Name = nameof(Vendor);

        Field(h => h.Id);
        Field(h => h.VendorCompanyName);
        Field(h => h.Managers, type: typeof(ListGraphType<ManagerType>), nullable: true);

        Field(h => h.VendorIngredientTypes, type: typeof(ListGraphType<VendorIngredientTypeType>), nullable: true);
    }
}

VendorIngredientType

public class VendorIngredientTypeType : ObjectGraphType<Models.VendorIngredientType>
{
    public VendorIngredientTypeType()
    {
        Name = nameof(VendorIngredientTypeType);

        Field(h => h.Id, nullable: true);
        Field(h => h.VendorId, nullable: true);
        Field(h => h.IngredientTypeId, nullable: true);

        Field(h => h.Vendor, type: typeof(VendorType), nullable: true);
        Field(h => h.IngredientType, type: typeof(IngredientType), nullable: true);
        Field(h => h.VendorIngredients, type: typeof(ListGraphType<VendorIngredientTypeType>), nullable: true);
    }
}