如何使用 NodeJS MongoDB 获取完整的索引信息以便能够重新创建相同的索引

Question

Docs say, use Collection.indexInformation({full: true}) to return full information about the indexes on collection. However, this only gives partial info.

https://mongodb.github.io/node-mongodb-native/3.5/api/Collection.html#indexInformation

I need full info so that I can "copy" (recreate) the same index on a different collection.

What am I doing wrong? Thanks!

Answer 1

The response does not separate the options and keys of index, rather it merges them into one object. To be able to recreate the same index, you need to parse it.

export function parseIndexInformation(index) {
  const keys = index.key;
  const options = {};

  delete index.v;
  delete index.ns;
  delete index.key;

  for (let option in index) {
      options[option] = index[option];
  }

  return {keys, options};
}