node.js - 使用 join-monster 库 (GraphQL) 对根查询字段进行分页

Question

我正在努力按照文档使用 join-monster 库来实现应用程序层分页:http://join-monster.readthedocs.io/en/latest/pagination/

所有示例都是关于从特定 Node 对关系进行分页，但我想对 RootQuery 中的字段进行分页。我的 RootQuery 如下所示:

const RootQuery = new GraphQLObjectType({
  name: "Query",
    articles: {
      type: new GraphQLList(ArticleType),
      args: {},
      resolve(parentValue, args, context, resolveInfo) {
        return joinMonster(
          resolveInfo,
          {},
          sql => {
            return knex.raw(sql).then(result => {
              return result[0];
            });
          },
          { dialect: "mysql" }
        );
      }
    }
  })
});

我想对文章字段进行分页，因此我尝试将其转换为连接:

const RootQuery = new GraphQLObjectType({
  name: "Query",
  fields: () => ({
    articles: {
      type: ArticleConnection,
      args: gqlUtils.connectionArgs,
      resolve(parentValue, args, context, resolveInfo) {
        return joinMonster(
          resolveInfo,
          {},
          sql => {
            return knex.raw(sql).then(result => {
              return gqlUtils.connectionFromArray(result[0], args);
            });
          },
          { dialect: "mysql" }
        );
      }
    }
  })
});

但是当对其运行查询时，我收到错误

function must return/resolve an array of objects where each object is a row from the result set. Instead got { edges...

现在我陷入困境了。我是否以错误的方式处理它？我该怎么做呢？

谢谢。

Answer 1

这几乎是正确的，问题是我在将数据发送到 joinMonster 之前调用了“connectionFromArray”，显然必须在之后调用它:

const RootQuery = new GraphQLObjectType({
  name: "Query",
  fields: () => ({
    articles: {
      type: ArticleConnection,
      args: connectionArgs,
      resolve(parentValue, args, context, resolveInfo) {
        return joinMonster(
          resolveInfo,
          {},
          sql => {
            return knex.raw(sql).then(result => {
              return result[0];
            });
          },
          { dialect: "mysql" }
        ).then(data => connectionFromArray(data, args));
      }
    }
  })
});