How to get & display specific values from array of objects in MySQL DB?

Question

I have an array of users that contains objects for each user with full name, id, role, etc. Said users have a paramater: user_machines that it's array filled with objects in itself, and i want to get & display specific values from each object of this array. More specifically, it goes like this: I display all users, and if the user has user_machines array with objects in it, i want to display for example the machine_name of said object.

At this time, my query looks like this:

class UserController extends Controller
{
    public function index()
    {
        $users = User::with('userMachines')->get();
        return response()->json(
            [
                'status' => 'success',
                'users' => $users->toArray()
            ],
            200
        );
    }

It get's all the information i need, but i dont know how to sort it. Here's my getUsers mixin:

export const getUsers = {
  methods: {
    getUsers() {
      axios
        .get("users")
        .then(res => {
          this.users = res.data.users;
        })
        .catch(err => {
          console.log(err);
        });
    }
  }
};

And here's my initialization method:

 methods: {
    initialize() {
      this.users = [
        {
          id: "",
          full_name: "",
          username: "",
          role: "",
          division: "",
          center: "",
          machines: "",
          user_machines: []
        }
      ];
    },

Here's the Data Table:

            <v-data-table
              :headers="headers"
              :items="users"
              :key="users.id"
              :search="search || radio"
              hide-actions
              class="elevation-1"
            >
              <template v-slot:items="props">
                <td class="text-xs-left">
                  <v-avatar :size="30" color="grey lighten-4">
                    <img :src="avatar">
                  </v-avatar>
                </td>
                <td class="text-xs-left">{{ props.item.full_name }}</td>
                <td class="text-xs-left">{{ props.item.role }}</td>
                <td class="text-xs-left">{{ props.item.division }}</td>
                <td class="text-xs-left">{{ props.item.center }}</td>
                <td class="text-xs-left">{{ props.item.user_machines }}</td>
                <td class="justify-right layout ml-3">
                  <v-spacer></v-spacer>
                  <v-btn color="#009af9" flat @click="editItem(props.item)">ВИЖ</v-btn>
                </td>
              </template>
              <template v-slot:footer>
                <td :colspan="headers.length">
                  <v-btn color="#009af9" class="getMoreButton" large dark>GET MORE</v-btn>
                </td>
              </template>
              <template v-slot:no-data>
                <v-alert
                  :value="true"
                  color="error"
                  icon="warning"
                >Sorry, nothing to display here :(</v-alert>
                <v-btn color="#009af9" @click="initialize">Reset</v-btn>
              </template>
            </v-data-table>

Here's how it looks in a get request in Telescope:

users: [
{
id: 1,
full_name: "SomeDude",
username: "SomeDude",
role: "admin",
division: "asdf",
center: "asdf",
created_at: "2019-05-25 10:24:17",
updated_at: "2019-05-25 10:24:17",
user_machines: [
{
id: 1,
machine_number: 2143,
machine_name: "FirstMachine",
machine_division: "FirstMachine"",
machine_center: "FirstMachine"",
machine_speed: "FirstMachine"",
created_at: "2019-05-25 10:24:17",
updated_at: "2019-05-25 10:24:17",
pivot: {
user_id: 1,
machine_id: 1
}
},
{
id: 2,
machine_number: 2241,
machine_name: "SecondMachine",
machine_division: "SecondMachine",
machine_center: "SecondMachine",
machine_speed: "SecondMachine",
created_at: "2019-05-25 10:24:17",
updated_at: "2019-05-25 10:24:17",
pivot: {
user_id: 1,
machine_id: 2
}
},
{
id: 3,
machine_number: 2341,
machine_name: "ThirdMachine",
machine_division: "ThirdMachine",
machine_center: "ThirdMachine",
machine_speed: "ThirdMachine",
created_at: "2019-05-25 10:24:17",
updated_at: "2019-05-25 10:24:17",
pivot: {
user_id: 1,
machine_id: 3
}
}

I would really appreciate some help and some directions on what to read on the subject from more expirienced developers. I'm using Laravel, Vue, MySQL. Thanks in advance!

Answer 1

If you only want to display the machine_name then you'll either need to loop through them using v-for:

replace

<td class="text-xs-left">{{ props.item.user_machines[0].machine_name }}</td>

with

<td class="text-xs-left">
    <ul>
        <li v-for="user_machine in props.item.user_machines" v-text="user_machine.machine_name"></li>
    </ul>
</td>

Obviously you can use different markup instead of the unordered list (</ul>) if you want to.

---

Or if you're only wanting to display the first one then you could do something like:

<td class="text-xs-left">{{ props.item.user_machines[0].machine_name }}</td>