mixin.js

import Mixin from '@ember/object/mixin';
export default Mixin.create({
  isShowingDeleteConfirmation: false,
  actions: {
    requestDelete() {
      this.toggleProperty('isShowingDeleteConfirmation');
    },
    cancelDelete() {
      this.toggleProperty('isShowingDeleteConfirmation');
    },
    delete(item) {
      this.toggleProperty('isShowingDeleteConfirmation');
      item.destroyRecord().then( () => {
        let p = this.get('parentRoute');
        this.transitionToRoute(p);
      });      
    }
  }  
});