Set property of an object in an array VueJS?

Question

So i am making a small list in which i have a list of car companies and an option for users to select their favorite one. I have an array of objects which returns the name and a certain property named starred. I have a method setStarred which sets the starred of selected to true. But what i am trying to achieve is to have the option to only select one at a time, so if i select BMW, the starred for other two should be toggled to false. Right now i can toggle all of them at the same time.

Please check this working codepen.

Check out the working example below:-

new Vue({
  el: '#app',
  data() {
    return {
      cars: [{
          name: 'Toyota',
          starred: false
        },
        {
          name: 'BMW',
          starred: false
        },
        {
          name: 'Ford',
          starred: false
        }
      ]
    }
  },
  methods: {
    setStarred(item) {
      item.starred = !item.starred
    }
  }
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vuetify.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/vuetify.min.css" rel="stylesheet" />
<link rel="stylesheet"  href='https://fonts.googleapis.com/css?family=Roboto:300,400,500,700|Material+Icons'>

<div id="app">
  <v-app id="inspire">
    <v-container>
      <v-layout justify-center column>
        <v-flex xs6 v-for="(car,index) in cars" :key="index">
          <h2>{{car.name}}
            <v-icon :color="car.starred ? 'primary': '' " @click="setStarred(car)">star_border
            </v-icon>
          </h2>
        </v-flex>
      </v-layout>
    </v-container>
  </v-app>
</div>

Any help will be appreciated. Thank you.

s4k1b · Accepted Answer · 2020-06-14 05:46:34Z

You have to loop throw other array items and set their starred property to false. Or, you can store a data variable to indicate the index of the object which is currently stared.

new Vue({
  el: '#app',
  data() {
    return {
      cars: [{
          name: 'Toyota',
          starred: false
        },
        {
          name: 'BMW',
          starred: false
        },
        {
          name: 'Ford',
          starred: false
        }
      ],
      lastStarredIndex: null
    }
  },
  methods: {
    setStarred(index) {
      if (this.lastStarredIndex === index) {
        // toggle same item
        this.cars[index].starred = !this.cars[index].starred;
        if (this.cars[index].starred) this.lastStarredIndex = index;
        else this.lastStarredIndex = null;
      } else {
      
          // disable last stared item
          if (this.lastStarredIndex !== null) this.cars[this.lastStarredIndex].starred = false;

          // set the new one
          this.cars[index].starred = true;
          
          this.lastStarredIndex = index;
       }
    }
  }
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vuetify.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/vuetify.min.css" rel="stylesheet" />
<link rel="stylesheet"  href='https://fonts.googleapis.com/css?family=Roboto:300,400,500,700|Material+Icons'>

<div id="app">
  <v-app id="inspire">
    <v-container>
      <v-layout justify-center column>
        <v-flex xs6 v-for="(car,index) in cars" :key="index">
          <h2>{{car.name}}
            <v-icon :color="car.starred ? 'primary': '' " @click="setStarred(index)">star_border
            </v-icon>
          </h2>
        </v-flex>
      </v-layout>
    </v-container>
  </v-app>
</div>

James Jomuad · Accepted Answer · 2020-06-14 06:21:31Z

1

new Vue({
  el: '#app',
  data() {
    return {
      cars: [{
          name: 'Toyota',
          starred: false
        },
        {
          name: 'BMW',
          starred: false
        },
        {
          name: 'Ford',
          starred: false
        }
      ]
    }
  },
  methods: {
    setStarred(item) {
      // Set all to false
      _.each(this.cars, function(value, key) {
          value.starred = false;
      });
      item.starred = true
    }
  }
})

answered Jun 14, 2020 at 6:21

James Jomuad

603 bronze badges

Comments

MUHAMMAD ILYAS · Accepted Answer · 2021-01-10 12:04:19Z

Solution

new Vue({
  el: "#app",
  data() {
    return {
      cars: [
        {
          name: "Toyota",
          starred: false,
        },
        {
          name: "BMW",
          starred: false,
        },
        {
          name: "Ford",
          starred: false,
        },
      ],
    };
  },
  methods: {
    setStarred(item) {
      this.cars.forEach((car) => (car.starred = car.name === item.name));
    },
  },
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vuetify.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/vuetify.min.css" rel="stylesheet" />
<link rel="stylesheet"  href='https://fonts.googleapis.com/css?family=Roboto:300,400,500,700|Material+Icons'>

<div id="app">
  <v-app id="inspire">
    <v-container>
      <v-layout justify-center column>
        <v-flex xs6 v-for="(car,index) in cars" :key="index">
          <h2>{{car.name}}
            <v-icon :color="car.starred ? 'primary': '' " @click="setStarred(car)">star_border
            </v-icon>
          </h2>
        </v-flex>
      </v-layout>
    </v-container>
  </v-app>
</div>

mohammad · Accepted Answer · 2020-06-14 13:25:33Z

0

<v-icon :color="car.starred ? 'primary': '' " @click="setStarred(index)">star_border
            </v-icon>

methods: {
        setStarred(index) {
          this.cars.map(i => {
            i.starred = false
          })
          this.cars[index].starred = true
        }
      }

answered Jun 14, 2020 at 13:25

mohammad

5414 silver badges17 bronze badges

1 Comment

Somethingwhatever Over a year ago

Thank you brother!! this is perfect.

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