How to get elastic search mapping properties name from react frontend

Question

I want to know how to get only the properties inside the mapping from using react frontend. this mappings is in my backend. I want to get only the properties not the value using elastic search query .backend is nodejs one . Output should be the account, class, team_members.id, team_members.name, team_members.priority .

  "mappings": {
            "properties": {
                "account": {"type": "integer"},
                  "class" : { "type" : "keyword",
                            "normalizer" : "my_normalizer"
                          },
                "team_members": {
                    "properties": {
                        "id": {"type": "integer"},
                        "name": {"type": "text"},
                        "priority": {"type": "integer"}
                    }
               }
          }
    }

Can you add more context to the question, and what have you tried till now. By name you mean the name of fields like `team_members.id`, `account` ? — Yash Joshi, May 28 '20 at 06:58
Can you add what do you mean by name, for eg you can add what will be the sample output for the above mappings. — Yash Joshi, May 28 '20 at 10:48
this is what I put as dummy . I want to get mapping details from my frontend. I want only those properties of particular index. Output should be the account, class, team_members.id, team_members.name, team_members.priority — Oshini, May 28 '20 at 16:20

score 0 · Answer 1 · answered May 28 '20 at 07:00

0

Do you mean how to get the properties value in your object above from the front end as a prop? if so you can just destructure the prop in the function header. Instead of having (props) in function header, just use ({ mappings: { meeting: {properties}}}). You can then use the properties normally on the front end as an object type. For example:

const funComponent = ({ mappings: { meeting: {properties}}}) => {
 // properties can now be used inside this function anywhere as an object.
// for example properties.account or proprties.team_members
return (
  ...
);

};

answered May 28 '20 at 07:00

Rahul Pillai

187
1
9

no actually this mapping is in my backend. I want to get only the property names not the value , using elastic search query . backend is nodejs project and frontend is reactjs so frontend can access backend using elastic query – Oshini May 28 '20 at 08:27
If you want the property names (Keys) only for the entire object, you can use something like recursion to traverse through it and acquire key names. Check: https://stackoverflow.com/questions/42674473/get-all-keys-of-a-deep-object-in-javascript – Rahul Pillai May 28 '20 at 13:48

score 0 · Answer 2 · answered May 28 '20 at 07:48

Loop the values

Object.values() - Get the object values

Object.keys() - Get the objects keys

class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      mappings: {
        meeting: {
          properties: {
            account: { type: "integer" },
            class: { type: "keyword", normalizer: "my_normalizer" },
            team_members: {
              properties: {
                id: { type: "integer" },
                name: { type: "text" },
                priority: { type: "integer" }
              }
            }
          }
        }
      }
    };
  }
  render() {
    let dataValue = [];
    Object.values(this.state.mappings).forEach((ele, i) => {
      console.log(ele.properties.account.type);
      console.log(ele.properties.class.type);
      console.log(ele.properties.class.normalizer);
      dataValue.push(<li>{ele.properties.account.type}</li>)
    });
    return <div>{dataValue}</div>;
  }
}
export default App;

score 0 · Answer 3 · answered May 29 '20 at 04:48

You need to call _mapping endpoint on the ElasticSearch Cluster with the index you want the mappings for. Ref: https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping.html#view-mapping

At Frontend, you may have to write a parser that will take this mapping and return the fields. You will need custom logic to handle this.

The mappings you specified, I think belong to ElasticSearch v7.

Note: You may have to write your own parser logic in this case as there can be other solutions and each solution will depend on requirements.

How to get elastic search mapping properties name from react frontend

3 Answers3