<column *ngFor="let col of columns">
...
<div [dragula]="'tickets-list'" [dragulaModel]="col.tickets">
<ul>
<li *ngFor="let ticket of col.tickets">
{{ ticket }}
</li>
</ul>
</div>
</column>
我的专栏很少。每列都包含带有门票的数组。如何检测移动的票证和位置?