email_aware_04-02.py

POST courses-03/_bulk
{"index":{"_id":"A123"}}
{"comments":"if you think the course is nice and wanna comment, please send an email to -> donna.karen@uni.gov or jojo.star.crusade@uni.gov . Thx~"}
{"index":{"_id":"b1234"}}
{"comments":"Shout out to the great instructors donnie.yun@uni.gov and blah@uni.gov.uk"}
{"index":{"_id":"cy7L"}}
{"comments":"welcome donna.liselot@uni.gov to join the training team"}

/* no results */
GET courses-03/_search
{
  "query": {
    "match": {
      "comments": "donna"
    }
  }
}

/* searchable through partial email address values (e.g. donna) */
GET courses-03/_search
{
  "query": {
    "match": {
      "comments.email": "donna"
    }
  },
  "highlight": {
    "fields": {
      "comments.email": {}
    }
  }
}

/* only searchable if providing the full exact email address */
GET courses-03/_search
{
  "query": {
    "match": {
      "comments": "donna.liselot@uni.gov"
    }
  },
  "highlight": {
    "fields": {
      "comments": {}
    }
  }
}