如何在GraphQL-Dotnet中将父类型值作为参数传递给子类型?

时间:2019-10-08 14:48:40

标签: graphql graphql-dotnet

显示-父类型

人-子类型

一个节目可以有很多人。我想将show类型的每个'personId'作为其子类型Person的参数传递,如下所示:

{
  shows 
  {
    showId
    personId
    person(personId: <I_NEED_TO_PASS_THE_personId_ABOVE_HERE>) 
    {
      name
    }
  }
}

我可以知道如何在“人员”字段中访问“人员编号”字段(同级)的值吗?

public class ShowType : ObjectGraphType<Core.Show>
{
    public ShowType(
        IPersonRepository PersonRepository,
        IHttpContextAccessor accessor)
    {
        Field(a => a.ShowId);
        Field(a => a.PersonId); // PERSONID_VALUE

        Field<PersonType>(
          "Person",
          arguments: new QueryArguments(
            new QueryArgument<IdGraphType> { Name = "PersonId" }
          ),
          resolve: context =>
          {
              var PersonId = context.GetArgument<string>("PersonId");
              return PersonRepository.GetPerson(accessor.HttpContext, <I_NEED_PERSONID_VALUE_DIRECTLY_HERE_OR_THROUGH_ARGUMENTS>);
          }
        );
    }
}

请告知如何实现此目标。

1 个答案:

答案 0 :(得分:0)

此问题已解决。感谢SUNMO-How to access arguments in nested fields in ASP.NET Core GraphQL

public class ShowType : ObjectGraphType<Core.Show>
{
    public ShowType(
        IPersonRepository PersonRepository,
        IHttpContextAccessor accessor)
    {
        Field(a => a.ShowId);
        Field(a => a.PersonId);

        Field<PersonType>(
          "Person",
          resolve: context =>
          {
              return PersonRepository.GetPerson(accessor.HttpContext, context.Source.PersonId);
          }
        );
    }
}