使用 lodash 对一组对象进行排序：不起作用

Question

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?

Answer 1

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>