I am new to vue.js. I have this modal

<b-modal :id="`Rel${object.id}`" ref="editModal" title="Update data" centered hide-footer :myobject="object">
   <form class="needs-validation" @submit.prevent="handleEdit(object)">
   <div class="col-md-8">
                    <label class="mt-3">Days</label>
                    {{ weekdaySelected }}
                    <multiselect
                      required
                      v-model="weekdaySelected"
                      :options="weekdayOptions"
                      track-by="id"
                      label="weekday"
                      multiple
                      placeholder="Choose day"
                      selectLabel="Choose day"
                      selectedLabel="Chose"
                    >
                    </multiselect>
                  </div>
   </form>
</b-modal>

And this is the method who edit data:

handleEdit(row) {
  if (this.timesAreValid(row.start_time, row.end_time, row.is_night_shift)) {
    const data = { ...row };
    console.log("My data: ",data);
    console.log("My weekdays before update: ", data.weekdays);
    // data.weekdays=this.weekdaySelected.map(day=>day.id);
    this.weekdaySelected=data.weekdays;
    console.log("My weekdays: ", data.weekdays);
    console.log("Initial selected weekdays: ", this.weekdaySelected)
    // delete data.weekdays;
    this.weekdaySelected=row.weekdays;
    console.log("Selected weekdays: ", this.weekdaySelected);
    data.weekdays = row.weekdays.map(e => { return { 'id': e, 'weekday': e-1 } });
    console.log("My new weekdays: ", data.weekdays);
    session.put(`api/user/schedule/${row.id}/update/`, data).then((resp) => {
      console.log(resp.data)
      this.$toastr.Add({
        name: "UniqueToastName",
        title: `Update`,
        msg:
          "Schedule updated",
        style: { backgroundColor: "#4fd69c", width: "550px" },
        progressbar: false,
        timeout: 3501,
      });

      console.log("Row: ",row);
      setTimeout(()=>{
        this.$bvModal.hide(`Rel${row.id}`);
      }, 1000);

    }).catch(e => {
      this.$toastr.e(`Error : ${JSON.stringify(e)}  `)
    })
  } else {
    this.$toastr.e("End hour should be after start hour");
  }

},

My problem is that data are saved to weekdaySelected in row this.weekdaySelected=data.weekdays; but when I press the edit button they don’t appear in placeholder.