如何在 ng-select 中防止值 selected 跨越多个 select
How to prevent the value selected across multiple select in ng-select
我有两个下拉菜单,它们从同一个 array.If 和 select 第一个下拉菜单中的一个选项获取数据,然后该值在第二个下拉菜单中不可用,反之亦然。
我正在使用 ng-select,但我可以看到与我的问题相关的任何内容。我找到了 他们在 angular js 中使用过滤器选项的地方,但是如何在 ng-select
中完成同样的事情
我已尝试禁用 ng-select 中的选项,如下所示,但如果用户 select 有另一个选项,我该如何启用之前禁用的值。
change(data) {
const items = this.hardwareIds.slice();
this.hardwareIds.forEach((hardwareId) => {
if (hardwareId.id === data.id) {
hardwareId.disabled = true;
}
});
this.hardwareIds = [];
this.hardwareIds = [...items];
}
下拉菜单
<ng-select
#sourceSelect
[items]="hardwareIds"
[selectOnTab]="true"
[clearable]="false"
bindValue="id"
bindLabel="hardware_id"
labelForId="source_switch_id"
placeholder="Select source switch id"
formControlName="source_switch_id"
(change)="change($event)"
>
</ng-select>
<ng-select
#destinationSelect
[items]="hardwareIds"
[selectOnTab]="true"
[clearable]="false"
bindValue="id"
bindLabel="hardware_id"
labelForId="dest_switch_id"
placeholder="Select destination switch id"
formControlName="dest_switch_id"
(change)="change($event)"
>
</ng-select>
只需创建两个变量"source"和"dest",并在创建表单后订阅form.valueChanges以过滤值。我使用 merge rxjs 运算符,您可以有两个订阅,一个用于 this.form.get('dest_switch_id').valueChanges,另一个用于 this.form.get('source_switch_id').valueChanges
hardwareIds = [
{ id: 1, hardware_id: "uno" },
{ id: 2, hardware_id: "dos" },
{ id: 3, hardware_id: "tres" },
{ id: 4, hardware_id: "cuatro" },
{ id: 5, hardware_id: "cinco" }
];
form=new FormGroup({
source_switch_id:new FormControl(),
dest_switch_id:new FormControl(),
})
//you create two variables "source" and "dest"
source = this.hardwareIds;
dest = this.hardwareIds;
ngOnInit() {
merge(
this.form.get('dest_switch_id').valueChanges,
this.form.get('source_switch_id').valueChanges
).subscribe(()=>{
this.source = this.hardwareIds.filter(x => x.id != this.form.get('dest_switch_id').value);
this.dest = this.hardwareIds.filter(x => x.id != this.form.get('source_switch_id').value);
})
}
}
在select
我有两个下拉菜单,它们从同一个 array.If 和 select 第一个下拉菜单中的一个选项获取数据,然后该值在第二个下拉菜单中不可用,反之亦然。
我正在使用 ng-select,但我可以看到与我的问题相关的任何内容。我找到了
我已尝试禁用 ng-select 中的选项,如下所示,但如果用户 select 有另一个选项,我该如何启用之前禁用的值。
change(data) {
const items = this.hardwareIds.slice();
this.hardwareIds.forEach((hardwareId) => {
if (hardwareId.id === data.id) {
hardwareId.disabled = true;
}
});
this.hardwareIds = [];
this.hardwareIds = [...items];
}
下拉菜单
<ng-select
#sourceSelect
[items]="hardwareIds"
[selectOnTab]="true"
[clearable]="false"
bindValue="id"
bindLabel="hardware_id"
labelForId="source_switch_id"
placeholder="Select source switch id"
formControlName="source_switch_id"
(change)="change($event)"
>
</ng-select>
<ng-select
#destinationSelect
[items]="hardwareIds"
[selectOnTab]="true"
[clearable]="false"
bindValue="id"
bindLabel="hardware_id"
labelForId="dest_switch_id"
placeholder="Select destination switch id"
formControlName="dest_switch_id"
(change)="change($event)"
>
</ng-select>
只需创建两个变量"source"和"dest",并在创建表单后订阅form.valueChanges以过滤值。我使用 merge rxjs 运算符,您可以有两个订阅,一个用于 this.form.get('dest_switch_id').valueChanges,另一个用于 this.form.get('source_switch_id').valueChanges
hardwareIds = [
{ id: 1, hardware_id: "uno" },
{ id: 2, hardware_id: "dos" },
{ id: 3, hardware_id: "tres" },
{ id: 4, hardware_id: "cuatro" },
{ id: 5, hardware_id: "cinco" }
];
form=new FormGroup({
source_switch_id:new FormControl(),
dest_switch_id:new FormControl(),
})
//you create two variables "source" and "dest"
source = this.hardwareIds;
dest = this.hardwareIds;
ngOnInit() {
merge(
this.form.get('dest_switch_id').valueChanges,
this.form.get('source_switch_id').valueChanges
).subscribe(()=>{
this.source = this.hardwareIds.filter(x => x.id != this.form.get('dest_switch_id').value);
this.dest = this.hardwareIds.filter(x => x.id != this.form.get('source_switch_id').value);
})
}
}
在select