rollbackAttributes for attr('array') field

Ember Data
1

i have an attribute that is an array of objects , myArray: attr('array') , rollbackAttributes() is not applying on this attribute , is there any ready way to do it or should i implement something to handle it ? thank you.

@action
  deleteItem(index) {
    this.container.myArray.removeAt(index);
  }

... if not saved => this.container.rollbackAttributes();

ember-data : 3.24

2

i have solved it by manually saving a copy of it, in my case this is working, does this solution present any inconvenient for more general cases ?

// my-model.js
init() {
    this._super(...arguments);
    if(this.get('myArray').length > 0){
      this.set('_myArray', this.get('myArray').slice());
    }
  },
  rollbackMyArray() {
    const _myArray = this.get('_myArray');
    this.set('myArray', [..._myArray]);
  },
  rollbackAttributes() {
    this._super(...arguments);
    this.rollbackMyArray();
  },
3

This is the last version working for my case, i hope it will help someone.

init() {
    this._super(...arguments);
    this.cacheMyArray();
},
cacheMyArray(){
  this.set('_myArray ', []);
  let myArray  = this.get('myArray');
  if(myArray) this.set('_myArray', [...myArray]);

},
rollbackMyArray() {
  let _myArray  = this.get('_myArray ');
  if(_myArray) this.set('myArray', [..._myArray ]);
},
rollbackAttributes() {
  this._super(...arguments);
  this.rollbackMyArray();
},
save() {
  this.cacheMyArray();
  return this._super(...arguments)
    .then((result) => {
      return result;
    })
    .catch((error) => {
      throw error;
    });
},