我在循环中有一个项目列表。该数组最多有6个项目。
<div *ngFor="let item of items; let i=index">
<item-detail [item]="item" [dragula]='"first-bag"' [dragulaModel]='myItems' id="{{item.id}}" position={{i}}></item-detail>
</div>
我想要的输出是,当用户将项目拖放到另一个位置时,将执行API调用,新订单将保存在我的数据库中。
为了做到这一点,我需要物品ID和新位置。该位置必须是1到6之间的数字(基于用户拖动项目的位置..)
到目前为止我所做的是以下方法:
private onDrop(args) {
let [e, el] = args;
console.log(el.id)
console.log(el.position)
}
但ID和位置无法正常工作..我确信有一种更简单,更简单,更正确的方法。
有什么想法吗?
答案 0 :(得分:5)
您需要在项目的父容器中移动dragula指令,如下所示:
PendingIntent
在yourComponent.ts
中<div class="container" [dragula]='"bag-one"' [dragulaModel]='items'>
<div [attr.id]="item.id" [attr.title]="i" class="card-item" *ngFor="let item of items; let i=index">
<item-detail></item-detail>
</div>
</div>
您还可以在Item-Detail组件中使用@Input输入所需的ID和位置。
let [el, target, source] = args;
console.log(el.id);
console.log(el.title);
在你的Component.ts
中<item-detail [iteminfo]="item"></item-detail>
这是我在我的项目中所做的。对于我的父组件:
Import {Component, Input} from '@angular/core';
@Component({....});
@Input() iteminfo: Item;
对于项目组件:
import { Component, Input } from '@angular/core';
import { Card } from '../model/card';
import { Item } from '../model/item';
import { dragula, DragulaService } from 'ng2-dragula/ng2-dragula';
@Component({
selector: 'card', //parent component for item component
template: `
<div class="items"[dragula]='"bag-one"' [dragulaModel]='card.items'>
<div class="card-item" *ngFor="let item of card.items; let i = index; trackBy item?.item_Id">
<item [item]="item" [index]="i"></item>
</div>
</div>
})
export class CardComponent {
constructor(private dragulaService: DragulaService)
{
dragulaService.setOptions('bag-one', {
revertOnSpill: true
});
dragulaService.drop.subscribe((value) => {
this.onDrop(value.slice(1));
});
}
}
最后注意:请参阅&#34;使用setter拦截输入属性更改&#34;在CookBook下的angular.io网站 - &gt;组件互动https://angular.io/docs/ts/latest/cookbook/
答案 1 :(得分:1)
我知道这已经有一段时间了......但是我用这样的东西非常努力地挣扎,希望其他人能从我的想法中受益:
我的HTML:
<tbody [dragula]='"bag-one"' [dragulaModel]="currentWorkingData" #bag1>
<tr *ngFor="let faq of currentWorkingData; let i = index;" class="faq" [attr.data-id]="faq.id" [attr.data-index]="i" [attr.data-title]="faq.title" [attr.data-description]="faq.description">
<td>
<span>{{ faq.title }}</span>
</td>
<td>
<button (click)="removeFaq(faq)" class="btn btn-xs btn-danger">Remove</button>
<br />
<button (click)="editFaq(faq)" class="btn btn-xs btn-info">Edit</button>
</td>
</tr>
</tbody>
&#13;
在我的组件(打字稿)中,我有以下内容:
export class CategoriesComponent {
categoryList: any = [];
url: string = '';
updatedCategory: any = [];
constructor(private apiService: ApiService, private dragulaService: DragulaService) {
let currentCategory = this.categoryList;
this.url = apiService.urls.categories;
apiService.get(apiService.urls.categories).subscribe(
data => this.loadCategories(data),
err => this.loadCategories('err'));
dragulaService.setOptions('bag-one', {
revertOnSpill: true
});
dragulaService.drag.subscribe((value: any) => {
let currentCategory = this.categoryList; //onchage event ---> pushing data through
});
dragulaService.drop.subscribe((value: any[]) => { //runs when item being dragged is dropped into new location
let currentCategory = this.categoryList; // --> pushing the data through
const [bagName, e, el] = value;
this.onDrop(value.slice(1)); // --> passing to onDrop
});
}
private onDrop(args: any) {
let [el, target, source] = args;
const rowData = Array.from(target.children);
this.updatedCategory = rowData.map((row: any, index: number) => {
return {
id: row.dataset.id,
name: row.dataset.name,
sideBar: row.dataset.sidebar,
index
}
});
return new Promise((resolve: any, reject: any) => {
this.handleSaveRequest();
});
}
loadCategories(res:any) {
if(res === 'err'){
swal('Ooops!', 'Something went wrong, prease try again.', 'error');
} else {
console.log(res); //returns the current (correct) array
for (let i = 0; i < res.categories.length; i++) {
this.categoryList.push({
id: res.categories[i].id,
value: res.categories[i].name,
sideBar: res.categories[i].sideBar,
index: res.categories[i].index
});
}
}
}
&#13;
第一次执行此操作时,您必须手动将索引编号循环到其中,以便它具有初始值(或在保存到数据库时设置它)。
然后,当你拖放一些东西时^^^ ondrop方法也会在同一个组件(typescript)中运行一个handleSave方法...... 对我来说,我循环浏览页面上的当前值。我认为这是最好的方式,因为你一次推动几件事情(虽然,我没有javascript专家):
handleSaveRequest(): Promise < any > {
const listCatArrange = this.updatedCategory;
const { name, sideBar, id, index } = this.categoryList;
let side_bar = sideBar;
const bodyCL = { name, side_bar, index };
return new Promise((resolve: any, reject: any) => {
let i = 0;
let processRequest = () => {
if(i < listCatArrange.length){
let bodyList = {
name: listCatArrange[i].name,
sideBar: listCatArrange[i].sideBar,
index: listCatArrange[i].index
};
let url = this.apiService.urls.categories;
let curId = listCatArrange[i].id;
this.apiService.patch(url + `/${curId}`, bodyList).subscribe(
data => processRequest(),
err => resolve('err'),
);
i++;
processRequest();
} else{
resolve(true);
}
};
processRequest();
});
}
&#13;
我希望这可以帮助那些人。我花了很长时间与朋友一起解决这个问题。关于如何做这样的事情的牵引文件肯定没有很多。