问题描述:

I am basically trying to show all records of an index type. Now, if you use match_all() in query elasticsearch shows 10 results by default. One can show all results using scroll. I am trying to implement scroll api, but can't get it to work. It is showing only 10 results, my code:

module.exports.searchAll = function (searchData, callback) {

client.search({

index: 'test',

type: 'records',

scroll: '10s',

//search_type: 'scan', //if I use search_type then it requires size otherwise it shows 0 result

body: {

query: {

"match_all": {}

}

}

}, function (err, resp) {

client.scroll({

scrollId: resp._scroll_id,

scroll: '10s'

}, callback(resp.hits.hits));

});

}

Can anyone help, please?

网友答案:

You need to repeatedly call client.scroll until no more records are returned. There's a good example in the elasticsearch documentation. I've reproduced their example code below, slightly modified to match your question

var allRecords = [];

// first we do a search, and specify a scroll timeout
client.search({
  index: 'test',
  type: 'records',
  scroll: '10s',
  body: {
     query: {
         "match_all": {}
     }
  }
}, function getMoreUntilDone(error, response) {
  // collect all the records
  response.hits.hits.forEach(function (hit) {
    allRecords.push(hit);
  });

  if (response.hits.total !== allRecords.length) {
    // now we can call scroll over and over
    client.scroll({
      scrollId: response._scroll_id,
      scroll: '10s'
    }, getMoreUntilDone);
  } else {
    console.log('all done', allRecords);
  }
});
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