[Vuejs]-Problems sending only the value of a select using typescript

You need to add emit-value and map-options, see: https://quasar.dev/vue-components/select#affecting-model as described here.

Quasar framework q-select sets an object in the v-model than the id

<q-select
outlined
class="q-mb-lg"
:options="rolesOptions"
emit-value
map-options
:label="$t('Users.form.role')"
v-model="fieldStates.category"
/>