Customize LiveData to auto fill one of fields by values from another

Hello!

Could any one help.
I have liveData table with several fields that I need to use to create unic identifier and keep it in another;
Are there any way to do it automatically? Maybe any macros that I can set like default value in Id field, that will get values from specific fields and store in Id field;

I found in vue DisplayerXObjectProperty place where to update value of editing field and automatically update entered value to add macros.

But I can’t found how to get values of other fields:
Is it possible to use this.logic or this.data.data ?
can’t found examples in code how to use it.

Place where I add customization:

 methods: {
    /**
     * Process the edit form content and send it to be saved.
     */
    applyEdit() {
      const documentName = this.logic.getEntryId(this.entry);
      if (!documentName) {
        new XWiki.widgets.Notification(this.$t('livedata.displayer.xObjectProperty.missingDocumentName.errorMessage'),
          'error');
      } else {
        $(document).trigger('xwiki:actions:beforeSave');
        const fields = $(this.$refs.xObjectPropertyEdit).find(':input').serializeArray();
        const className = this.data.query.source.className;

        const data = {};
        fields.forEach(field => {
          var newName = field.name;

          if (newName.startsWith(className)) {
            // Remove the class name and the object number in order to keep only the property name.
            newName = newName.substring(className.length);
            newName = newName.replace(/^_\d+_/, '');
          }

          // Aggregates the fields with the same name in an array. If a field is found only once it is stored alone.
          if (data[newName]) {
            if (!Array.isArray(data[newName])) {
              data[newName] = [data[newName]];
            }

            data[newName].push(field.value);
            
          } else {
            data[newName] = field.value;
          }
        });

        this.logic.getEditBus().save(this.entry, this.propertyId, data);
      }
    },