如何使用GraphQL Relay连接修复循环依赖关系

我已将我与该文件的连接分开并可以在我的根查询中使用它（当在类型中定义连接时它工作正常），但是当尝试通过将其导入到类型时使用它，连接是我的回来：

错误：PageEdge.node字段类型必须是输出类型，但得到：undefined

我可以在QueryType中使用连接，但不能使用PageType . 我的架构大致是这样的 .

QueryType {
  pages: [PageType]
}

PageType {
  _id: string
  pages: [PageType]
}

这是一个项目仓库的链接，其中有graphql的东西（我只是推了一个提交，错误地看到了所有的代码）：https://github.com/DaveyEdwards/myiworlds/tree/master/src/data

我已经使QueryType和PageType字段thunk（似乎解决了大多数人的问题的解决方案），并尝试从接口中创建一个thunk：

interfaces: () => [nodeInterface]

我认为这对于任何与用户和朋友构建应用程序的人来说都是一个非常普遍的问题 .

UserType: {
  friends: [UserType]
}

My PageType:

import { nodeInterface } from '../nodeInterface';
import PageConnection from './connections/PageConnection';

const PageType = new ObjectType({
  name: 'Page',
  description: 'Everything you see can be placed inside a page.',
  fields: () => ({
    id: globalIdField('Page', page => page._id),
    _id: {
      type: new NonNull(ID),
      description: 'A unique id used to instantly locate this page inside the database',
    },
    pageEdge: {
      type: PageConnection,
      args: connectionArgs,
      resolve: async (page, { args }, { loaders }) => {
        if (page.pageEdge) {
          const pageEdge = await loaders.pageLoader.loadMany(page.pageEdge);
          const connection = connectionFromArray(pageEdge, args);
          return connection;
        }
      },
    },
  }),
  interfaces: () => [nodeInterface],
});

export default PageType;

My PageConnection:

import { connectionDefinitions } from 'graphql-relay';

import PageType from '../PageType';

const { connectionType: PageConnection } = connectionDefinitions({
  name: 'Page',
  nodeType: PageType,
});

export default PageConnection;

My nodeInterface:

import { nodeDefinitions } from 'graphql-relay';
import { getNode, getNodeType } from './type-registry';

export const { nodeInterface, nodeField } = nodeDefinitions(getNode, getNodeType);

My type-registry:

import { fromGlobalId } from 'graphql-relay';
require('babel-polyfill');

const types = {};

export const registerType = (model, type, lookupFn) => {
  types[type.name] = { model, type, lookupFn };
};

export const getNode = async (globalId) => {
  const { type: typeName, id } = fromGlobalId(globalId);
  console.log('getNode', globalId, typeName, id);

  if (types[typeName]) {
    const object1 = await types[typeName].lookupFn(id);
    const Class = types[typeName].model;
    // let result  = Object.create(types[typeName].model, object1);
    const result = new Class(object1);
    console.log('getNode result', result);
    return result;
  }
  return null;
};

export const getNodeType = (obj) => {
  const keys = Object.keys(types);
  let ret = null;
  keys.map((typeName) => {
    if (obj instanceof types[typeName].model) {
      ret = types[typeName].type;
    }
    return true;
  });
  return ret;
};

My QueryType where the imported connection works

import {
  GraphQLObjectType as ObjectType,
  GraphQLList as List,
  GraphQLString as StringType,
} from 'graphql';
import { connectionArgs, connectionFromArray, connectionDefinitions } from 'graphql-relay';
import { nodeField } from '../nodeInterface';
import PageType from './PageType';
import { getPageList } from '../queries/googleDatastore/pageQueries';
import PageConnection from './connections/PageConnection';

const QueryType = new ObjectType({
  name: 'QueryType',
  fields: () => ({
    pages: {
      type: PageConnection,
      args: connectionArgs,
      resolve: async (obj, args) => {
        const response = [];
        try {
          const pageEdge = await getPageList();
          const connection = connectionFromArray(pageEdge, args);
          return connection;
        } catch (err) {
          console.log('pages err', err);
        }
        return response;
      },
    },
    node: nodeField,
  }),
});

export default QueryType;

Resources for this issue I have been trying to get working:

这个仓库的一部分就是我为了让连接在第一时间工作而实现的https://github.com/bondz/learn-graphql-relay/blob/47211fdec44ce4bb10f487bddfc7411e5690b894/src/types/projectConnection.js

Edge.node field type must be Output Type but got: undefined

https://github.com/graphql/graphql-js/issues/612

https://github.com/graphql/graphql-js/issues/373

https://gist.github.com/fbaiodias/77406c29ddf37fe46c3c