Mongodb – Vuejs- How to show name values in a <v-select> but send the ID in the axios POST request

EDIT: I fixed it by adding the return-object prop to v-select

When I add a student to a database from a vuetify form, I want to be able to assign them a course. But the course has to be in a list of available courses (also in the db). I managed to do that and show all the available courses in a dropdown menu.

However, when I add the new student to the database, it sends the name of the course but not the ID of the course, so the database doesn’t recognize it. I would like to link the name of the course from the v-select dropdown menu to its object ID and send the ID in the POST request.

My form component:

       <v-select
       :items="courses"
       v-model="Courses"
   
    item-value="name"
    item-text="name"
    label="Available courses"
    prepend-icon="folder"
   
  >
    <template v-slot:item="{ item, attrs, on }">
      <v-list-item
        v-bind="attrs"
        v-on="on"
        
      >
        <v-list-item-title
          :id="attrs['aria-labelledby']"
          v-text="item.name"
          
        ></v-list-item-title>
      </v-list-item>
    </template>
  </v-select>

Where I store all the available courses:

     computed: {
         courses() {
      return this.$store.state.courses;
    },

The axios POST method:

methods: {
       async addItem(){
        const response = await axios.post("http://localhost:4000/api/student", {
        name: this.name,
        Courses: this.courses,
      });
      this.items.push(response.data);
      this.name = "";
      this.courses ="";
      },
    },

My mongoDB model:

const Student =  mongoose.model(
    "Student",
    new mongoose.Schema({
    name: String ,
    Courses:  
        {
        type: mongoose.Schema.Types.ObjectId,
        ref:"id"
        },
})
);

module.exports = Student; 

The Course model:

const Course =  mongoose.model(
    "Course",
    new mongoose.Schema({
    name: String ,
    available: {type:Boolean , default :true} ,
})
);

module.exports = Course;