## ElasticSearch 7 Common Calls


### GET Version Info

```
GET {{ _.url }}/
```

```json
{
  "name": "iad1esapp2vz894",
  "cluster_name": "02d8af3b06f26098d2adc80fdeeab14a",
  "cluster_uuid": "pAEzGLJ9RVG1vaBiohStGw",
  "version": {
    "number": "7.2.1",
    "build_flavor": "oss",
    "build_type": "tar",
    "build_hash": "fe6cb20",
    "build_date": "2019-07-24T17:58:29.979462Z",
    "build_snapshot": false,
    "lucene_version": "8.0.0",
    "minimum_wire_compatibility_version": "6.8.0",
    "minimum_index_compatibility_version": "6.0.0-beta1"
  },
  "tagline": "You Know, for Search"
}
```



### GET Index Settings

Settings are where analyzers and tokenizers are defined. This one includes a custom ngram tokenezer.

```
GET {{ _.url }}/{{ _.index }}/_settings
```

```
{
  "searchable_content_dev": {
    "settings": {
      "index": {
        "mapping": {
          "total_fields": {
            "limit": "10000"
          }
        },
        "number_of_shards": "1",
        "provided_name": "searchable_content_dev",
        "creation_date": "1632918278107",
        "analysis": {
          "analyzer": {
            "lb_analyzer": {
              "tokenizer": "lb_tokenizer"
            },
            "nodash": {
              "type": "custom",
              "tokenizer": "whitespace"
            }
          },
          "tokenizer": {
            "lb_tokenizer": {
              "token_chars": [
                "letter",
                "digit"
              ],
              "min_gram": "3",
              "type": "ngram",
              "max_gram": "4"
            }
          }
        },
        "number_of_replicas": "1",
        "uuid": "lUzzMvlORi6NbWqsI0NmHQ",
        "version": {
          "created": "7020199"
        }
      }
    }
  }
}
```


### GET Index Mapping

The Mapping is how fields in content are getting indexed and mapped to analyzers.

```
GET {{ _.url }}/{{ _.index }}/_mapping
```

```json
{
  "searchable_content_dev": {
    "mappings": {
      "properties": {
        "content": {
          "properties": {
            "affirmation": {
              "type": "text",
              "fields": {
                "keyword": {
                  "type": "keyword",
                  "ignore_above": 256
                }
              }
            },
            "artisanStory": {
              "type": "text",
              "fields": {
                "keyword": {
                  "type": "keyword",
                  "ignore_above": 256
                }
              }
            },
            "description": {
              "type": "text",
              "fields": {
                "keyword": {
                  "type": "keyword",
                  "ignore_above": 256
                }
              }
            },
    ...
```


### POST Analyzer Test

You can submit text through an analyzer to see how it will break it down for search.

```
POST {{ _.url }}/{{ _.index }}/_analyze
```

```json
{
  "analyzer": "lb_analyzer",
  "text": "bees"
}
```

ngram based example:

```json
{
  "tokens": [
    {
      "token": "bee",
      "start_offset": 0,
      "end_offset": 3,
      "type": "word",
      "position": 0
    },
    {
      "token": "bees",
      "start_offset": 0,
      "end_offset": 4,
      "type": "word",
      "position": 1
    },
    {
      "token": "ees",
      "start_offset": 1,
      "end_offset": 4,
      "type": "word",
      "position": 2
    }
  ]
}
```

### Get a Document by ID

```
GET {{ _.url }}/{{ _.index }}/_doc/19982
```

```json
{
  "_index": "searchable_content",
  "_type": "_doc",
  "_id": "19982",
  "_version": 1,
  "_seq_no": 4780,
  "_primary_term": 1,
  "found": true,
  "_source": {
    "type": "general",
    "siteSearchFeatured": 0,
    "siteSearchShow": 1,
    "content": {
      "fullURL": "\/campaign\/2021\/send-a-lama-to-school-story",
      "navigationAnchor": "send-a-lama-to-school",
      "sharedContentTitle": "Send A Lama To School Story",
      "sharedContentCopy": "Every lama deserves an education, and your support makes it happen.",
      "metaDescription": "Every lama deserves an education, and your support makes it happen.",
      "title": "Send A Lama To School Story",
      "description": "Every lama deserves an education, and your support makes it happen.",
      "body": "Send a Lama to School\nEvery lama deserves an education, and your support makes it happen."
    },
    "displayData": {
      "url": "\/campaign\/2021\/send-a-lama-to-school-story.html",
      "image": null,
      "title": "",
      "description": "",
      "group": "general",
      "featured": 0
    }
  }
}
```

### Get Docs where Field EXISTS

```
POST {{ _.url }}/{{ _.index }}/_search
```

```json
{
  "query": {
    "exists": {
      "field": "content.wysiwyg"
    }
  }
}
```

### Get Docs where Field DOES NOT EXIST

```
POST {{ _.url }}/{{ _.index }}/_search
```

```json
{
  "query": {
    "bool": {
      "must_not": {
        "exists": {
          "field": "content.body"
        }
      }
    }
  }
}
```

### Search with Weight Boosting

A collection of `function_scoring` can boost how relevancy is scored for specific fields.

```
POST {{ _.url }}/{{ _.index }}/_search
```

```json
{
  "from": 0,
  "size": 15,
  "query": {
    "function_score": {
      "query": {
        "bool": {
          "must": [
            {
              "match": {
                "siteSearchShow": "1"
              }
            },
            {
              "match": {
                "siteSearchFeatured": "0"
              }
            },
            {
              "multi_match": {
                "query": "{{ _.q }}",
                "fields": [
                  "content.headerTitle",
                  "content.sharedContentTitle",
                  "content.productDescription",
                  "content.description",
                  "content.sharedContentCopy",
                  "content.title"
                ]
              }
            }
          ]
        }
      },
      "boost": 5,
      "functions": [
        {
          "filter": {
            "match": {
              "content.headerTitle": "{{ _.q }}"
            }
          },
          "random_score": [],
          "weight": 6
        },
        {
          "filter": {
            "match": {
              "content.sharedContentTitle": "{{ _.q }}"
            }
          },
          "random_score": [],
          "weight": 6
        },
        {
          "filter": {
            "match": {
              "content.productDescription": "{{ _.q }}"
            }
          },
          "random_score": [],
          "weight": 6
        },
        {
          "filter": {
            "match": {
              "content.description": "{{ _.q }}"
            }
          },
          "random_score": [],
          "weight": 6
        },
        {
          "filter": {
            "match": {
              "content.sharedContentCopy": "{{ _.q }}"
            }
          },
          "random_score": [],
          "weight": 6
        },
        {
          "filter": {
            "match": {
              "type": "lamas-and-donations"
            }
          },
          "random_score": [],
          "weight": 10
        }
      ]
    }
  }
}
```