How to auto-populate form fields using vue and laravel - laravel

Question

I'm developing a web application where I want to populate some field if I type computer_number I want to populate staff_old_name field that will select from staffs table.
This is what I've tried:
Template
<div>
<table class="table table-bordered table-hover">
<thead>
<tr>
<th>Computer Number</th>
<th>Old Name</th>
<th>New Name</th>
<th>Remarks</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<tr v-for="(staff, index) in staffs">
<td>
<span v-if="staff.editmode"><input class="form-control" v-model="staff.computer_number"/></span>
<span v-else>{{staff.computer_number}}</span>
</td>
<td>
<span v-if="staff.editmode"><input class="form-control" v-model="staff.old_name"/></span>
<span v-else>{{staff.old_name}}</span>
</td>
<td>
<span v-if="staff.editmode"><input class="form-control" v-model="staff.new_name"/></span>
<span v-else>{{staff.new_name}}</span>
</td>
<td>
<span v-if="staff.editmode"><input class="form-control" v-model="staff.remarks"/></span>
<span v-else>{{staff.remarks}}</span>
</td>
<td>
<span v-if="!staff.editmode"><button class="btn btn-info" type="button" #click="edit(staff)">Edit</button></span>
<span v-else><button class="btn btn-success" type="button" #click="save(staff)">Save</button></span>
<span><button type="button" class="btn btn-danger" #click="remove(index)"><i class="fa fa-trash"></i></button></span>
</td>
</tr>
</tbody>
</table>
<div class="box-footer">
<button class="btn btn-info" type="button" #click="cloneLast">Add Row</button>
</div>
</div>
Script
export default {
data() {
return {
staffs: [],
data_results: []
}
},
computed:{
autoComplete(){
this.data_results = [];
if(this.computer_number.length > 2){
axios.get('/api/staffs/autocomplete',{params: {computer_number: this.computer_number}}).then(response => {
console.log(response);
this.data_results = response.data;
});
}
}
},
methods: {
edit :function(obj){
this.$set(obj, 'editmode', true);
},
save : function(obj){
this.$set(obj, 'editmode', false);
},
remove: function(obj){
this.staffs.splice(obj,1);
},
cloneLast:function(obj){
//var lastObj = this.staffs[this.staffs.length-1];
//lastObj = JSON.parse(JSON.stringify(lastObj));
obj.editmode = true;
this.staffs.push(obj);
},
},
created() {
axios.get('/staff-names')
.then(response => this.staffs = response.data);
},
}
when I type the computer number I want the staff_old_name field populated base on staff name which is stored in staffs table.