Multiple Select Vue.js And Computed Property

I'm using Vue.js 2.0 and the Element UI library. I want to use a multiple select to attribute some roles to my users. The list of all roles available is received and assigned to av

Solution 1:

I agree mostly with @wostex answer, but he doesn't give you the userRoles property back. Essentially you should swap computedRoles and userRoles. userRoles becomes a computed property and computedRoles is a data property. In my update, I changed the name of computedRoles to selectedRoles.

varMain = {
    data() {
      return {
        availableRoles: [{
          id: 1,
          name: 'Admin'
        }, {
          id: 2,
          name: 'Power User'
        }, {
          id: 3,
          name: 'User'
        }],
        selectedRoles:[1,2]
      }
    },
    computed : {
      userRoles(){
         returnthis.availableRoles.reduce((selected, role) => {
             if (this.selectedRoles.includes(role.id))
                    selected.push(role);
             return selected;
         }, [])
      }
    }
  }
varCtor = Vue.extend(Main)
newCtor().$mount('#app')

And here is the fiddle.

Solution 2:

Check the solution: jsfiddle

The caveat here is that computed properties are getters mainly. You can define setter for computed property, but my approach is more vue-like in my opinion.

In short, instead of v-model on computed set v-model for data property.

Full code:

<script src="//unpkg.com/vue/dist/vue.js"></script>
<scriptsrc="//unpkg.com/element-ui/lib/index.js"></script><divid="app"><template><el-selectv-model="ids"multipleplaceholder="Select" @change="logit()"><el-optionv-for="item in availableRoles":label="item.name":value="item.id"></el-option></el-select></template></div>varMain = {
    data() {
      return {
        availableRoles: [{
          id: 1,
          name: 'Admin'
        }, {
          id: 2,
          name: 'Power User'
        }, {
          id: 3,
          name: 'User'
        }],
        userRoles: [{'id':1, 'name':'Admin'}, {'id':3, 'name':'User'}],
        ids: []
      }
    },
    mounted() {
        this.ids = this.userRoles.map(role => role.id);
    },
    methods: {
        logit: function() {
        console.log(this.ids);
      }
    }
  }
varCtor = Vue.extend(Main)
newCtor().$mount('#app')