formatDate (value) {
		let date = new Date(value);
		let y = date.getFullYear();
		let MM = date.getMonth() + 1;
		MM = MM < 10 ? ('0' + MM) : MM;
		let d = date.getDate();
		d = d < 10 ? ('0' + d) : d;
		let h = date.getHours();
		h = h < 10 ? ('0' + h) : h;
		let m = date.getMinutes();
		m = m < 10 ? ('0' + m) : m;
		let s = date.getSeconds();
		s = s < 10 ? ('0' + s) : s;
		return y + '-' + MM + '-' + d + ' ' + h + ':' + m + ':' + s;
}