VueJS how to select :selected in v-for loop?

Question

Vue.js

There is a cycle in which all doctors are enumerated and the selected parameter is set, but why is there no display

<select v-model="disease_history.doctor" class="form-control col-2">
                <option v-for="user in users" :value="user.id" :selected="user.id === disease_history.doctor.id">{>user.last_name<} {>user.last_name[0]<}.
                    {>user.last_name[0]<}.
                </option>
            </select>

user.id === disease_history.doctor.idreturnstrue

Answer 1

v-model="disease_history.doctor.id"
or
:value="user"