如何从另一个家长道具中获得道具？

Question

我想设置一个名为“ dates：”的prop的值，该值位于另一个名为“ attributes：”的prop-parent中。我找不到日期：因为它在prop属性数组中：并且因此我无法在created（）方法中设置日期的值。如何获得道具“ dates”并更改其值？

export default {
    name: "Vacations",
    data() {
        return {
            vacantDays: '5',
            isActive: false,
            vacDates: null,
            occupiedDays: [new Date("03 January 2019")],
            attr:
                [
                {
                    highlight: {
                        backgroundColor: '#ff8080',     // Red background
                        borderColor: '#ff6666',
                        borderWidth: '2px',
                        borderStyle: 'solid',
                    },
                    contentStyle: {
                        color: 'white',                 // White text
                    },
                    dates: [5],
                },
                ]
        }
    },
    created() {
        this.$acl.change(localStorage.getItem('user'));
        let name = localStorage.getItem('username');
        instance.get("/calendar/occupied",{
            params: {
                name: name
            }
        }).then(res => {
            console.log(res.data);
            let datesArray = res.data.map(dateString => new Date(dateString));
            console.log(datesArray);
            //this.attr.dates=datesArray;
            console.log(this.attr.get(dates));
        }).catch(err=> {
            console.log(err);
        });
    },
}