CODEWITHSUNDEEP
javascriptlodash
user11331566
user11331566

Reputation:

Sorting an array of objects with lodash: not working

I have an array that looks like this one (it has more objects, but the structure is the same):

[
  {
      especiality: "surgery",
      users: [
          {
              id: "182",
              country: "Colombia",
              province: "Bogota",
              telephone: "211112212",
              neighbourhood: "La Santa"
              region: "South",
          },
          {
            id: "182",
            country: "Venezuela",
            province: "Caracas",
            telephone: "322323333",
            region: "North",
        },
        {
          id: "183",
          country: "Brasil",
          telephone: "23232333",
          neighbourhood: "Santos"
          region: "South",
      },
      ]
  },

I want the addresses, if the ID is the same, to compose one single array (I need to map these elements). The outlook should look like this one:

user: [{id: 182, locations[(if they exist)               
              country: "Colombia",
              province: "Bogota",
              telephone: "211112212",
              neighbourhood: "La Santa"
              region: "South"], [country: "Venezuela",
            province: "Caracas",
            telephone: "322323333",
            region: "North"],}]

I´m currently trying this, but it´s not working at all:

getGroups = test => {
  _.chain(test)
  .groupBy("id")
  .toPairs()
  .map(item => _.zipObject(["id", "country", "province", "neighbourhood", "region"], item))
  .value();
  return test
  }

What am I doing wrong and how can I account for values that may not be available in all objects?

Upvotes: 1

Views: 106

Answers (1)

Ori Drori
Ori Drori

Reputation: 191996

After grouping the items by the id, map the groups, and create an object with the id, and the items of the group as locations. Map the locations, and use _.omit() to remove the id from them.

I'm not sure about how you want to handle the outer array. I've used _.flatMap() to get a single array of users, but there's a commented option if you need to maintain the original structure.

getGroups = test =>
  _(test)
  .groupBy("id")
  .map((locations, id) => ({
    id,
    locations: _.map(locations, l => _.omit(l, 'id'))
  }))
  .value();

const data = [{"especiality":"surgery","users":[{"id":"182","country":"Colombia","province":"Bogota","telephone":"211112212","neighbourhood":"La Santa","region":"South"},{"id":"182","country":"Venezuela","province":"Caracas","telephone":"322323333","region":"North"},{"id":"183","country":"Brasil","telephone":"23232333","neighbourhood":"Santos","region":"South"}]}];

const result = _.flatMap(data, ({ users }) => getGroups(users));

/** maintains the original structure
const result = _.map(data, ({ users, ...rest }) => ({
  ...rest,
  users: getGroups(users)
}));
**/

console.log(result);
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.js"></script>

Upvotes: 1

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