架构必须包含唯一的命名类型，但包含多个名为 "Page" 的类型

Question

我创建了一个 GraphQL 页面函数。但是，当我尝试重用它时，出现错误

Schema must contain unique named types but contains multiple types named "Page"

我知道我可以将 Page 更改为两个相同的函数并将它们命名为 JobsPage 和 PrintsPage。

但是，有没有简单的方法来重用它？谢谢

function Page(itemType) {
  return new GraphQLObjectType({
    name: 'Page',
    fields: () => ({
      totalCount: { type: GraphQLInt },
      edges: { type: new GraphQLList(Edge(itemType)) },
      pageInfo: { type: PageInfo }
    })
  });
}


const PrinterType = new GraphQLObjectType({
  name: 'Printer',
  fields: () => ({
    id: { type: GraphQLString },

    jobs: {
      type: Page(JobType),     // here I use Page first time
      args: {
        first: {
          type: GraphQLInt
        },
        after: {
          type: GraphQLString
        }
      },
      resolve(parentValue, args) {
        const { id } = parentValue;
        const { first, after } = args;

        return getPageJobs({ id, first, after });
      }
    },

    prints: {
      type: Page(PrintType),   // here I use Page again
      args: {
        first: {
          type: GraphQLInt
        },
        after: {
          type: GraphQLString
        }
      },
      resolve(parentValue, args) {
        const { id } = parentValue;
        const { first, after } = args;

        return getPagePrints({ id, first, after });
      }
    },
  })
});

Answer 1

我错过了它只是一个纯函数，我可以传递第二个值...

这是一种解决方案。

function Page(itemType, name) {
  return new GraphQLObjectType({
    name: `${name}Page`,
    fields: () => ({
      totalCount: { type: GraphQLInt },
      edges: { type: new GraphQLList(Edge(itemType, name)) },
      pageInfo: { type: PageInfo }
    })
  });
}


const PrinterType = new GraphQLObjectType({
  name: 'Printer',
  fields: () => ({
    id: { type: GraphQLString },

    jobs: {
      type: Page(JobType, 'Jobs'),     // here I use Page first time
      args: {
        first: {
          type: GraphQLInt
        },
        after: {
          type: GraphQLString
        }
      },
      resolve(parentValue, args) {
        const { id } = parentValue;
        const { first, after } = args;

        return getPageJobs({ id, first, after });
      }
    },

    prints: {
      type: Page(PrintType, 'Prints'),   // here I use Page again
      args: {
        first: {
          type: GraphQLInt
        },
        after: {
          type: GraphQLString
        }
      },
      resolve(parentValue, args) {
        const { id } = parentValue;
        const { first, after } = args;

        return getPagePrints({ id, first, after });
      }
    },
  })
});

架构必须包含唯一的命名类型，但包含多个名为 "Page" 的类型

Schema must contain unique named types but contains multiple types named "Page"

javascript

graphql

graphql-js