Atlas search pagenation

MongoDB Atlas Atlas Search
, ,
1

I use node-js sdk, code below, but the returned result do not contain searchSequenceToken field,

export const getBlogList = async (
  main: string,
  category: string,
  subcategory: string,
  q: string,
  searchToken: string
): Promise<{ data: any[]; more: boolean; nextToken?: string }> => {
  try {
    const pipeline: any[] = [];

    const shouldConditions = [];

    if (main || category || subcategory) {
      shouldConditions.push({
        text: {
          query: [main, category, subcategory].filter(Boolean),
          path: 'tags',
        },
      });
    }

    if (q) {
      shouldConditions.push({
        text: {
          query: q,
          path: ['tags', 'title', 'description', 'content'],
        },
      });
    }

    if (shouldConditions.length > 0) {
      pipeline.push({
        $search: {
          index: "candy-bag-blogs",
          compound: {
            should: shouldConditions,
            minimumShouldMatch: 1,
          },
          "sort": {
            "score": {
              "$meta": "searchScore", _id: 1
            }
          },
          ...(searchToken ? { searchAfter: [searchToken] } : {}),
        },
      });
    }
    pipeline.push({ $limit: pageSize });

    pipeline.push({
      $project: {
        paginationToken: { $meta: 'searchSequenceToken' },
        tags: 1,
        title: 1,
        description: 1,
      },
    });

    const res = await mongoClient.db().collection('Blog').aggregate(pipeline).toArray();
    console.log('111===res===', res);
    const more = res.length >= pageSize;
    return {
      data: res,
      more,
      nextToken: res.length > 0 ? res[res.length - 1].searchToken : undefined,
    };
  } catch (error) {
    console.error(error);
    return { data: [], more: false, nextToken: undefined };
  }
};
2

Looks like your query correctly specifies searchSequenceToken

but later code reads a token value from wrong variable, instead of reading from “searchToken”

res[res.length - 1].searchToken

most probably you need

res[res.length - 1].paginationToken