VueJS multiple selection

Question

I tried to multiple select with select2 i used laravel and my data on userRoles is returned data on User model with relation roles, and allRoles is just all in Role model code on view

<select class="form-control" name="roles[]" id="roles"  multiple>
            <option v-for="role in allRoles"
                    :value="role.id"
                    >
                @{{ role.name }}
            </option>
 </select>

how to set selected options using userRoles array?

JJPandari · Accepted Answer · 2016-11-27 04:43:17Z

1

Add a computed hashMap (object) to search for selected roles:

computed: {
    selectedRoleMap() {
        var map = {};
        this.userRoles.forEach(role => {
            map[role] = 1;
        });
        return map;
    }
}

Then add :selected="selectedRoleMap.hasOwnProperty(role.id)" to options.

Working fiddle here: https://jsfiddle.net/df7j8xhz/

Alternatively, you can add a hasRole method to loop through userRoles to see if an id is in userRoles, but build a hashMap and search in it has a better performance than looping the array allRoles.length times.

edited Nov 27, 2016 at 4:43

answered Nov 26, 2016 at 4:15

JJPandari

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3 Comments

JJPandari Over a year ago

@Rai Why do you need that array? Your problem is making some of the optionss selected right?

JJPandari Over a year ago

Let us continue this discussion in chat.

JJPandari Over a year ago

@Rai Let us continue this discussion in chat.

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