[英]Patch dynamic data to repeat type in angular-formly
我的目標是將外部json數據修補到包含FieldArrayType的表單。
說我有以下正式字段配置:
fields: FormlyFieldConfig[] = [
{
key: 'cars',
type: 'repeat',
fieldArray: {
fieldGroupClassName: 'row',
templateOptions: {
btnText: 'Add',
},
fieldGroup: [
{
className: 'col-sm-4',
type: 'input',
key: 'type',
templateOptions: {
label: 'Type:'
},
},
{
type: 'input',
key: 'name',
className: 'col-sm-3',
templateOptions: {
label: 'Name:'
},
},
],
},
},
];
然后,我想將一些數據打補丁到這種重復類型:
patchData() {
let data = {
"cars":[
{"type":"Type1","name":"Name1"},
{"type":"Type2","name":"Name2"}]
};
// Failure: Only the first car value is patched, the second car is not patched
// (unless) 'Add' is clicked first, which is not intended.
this.form.patchValue(data);
}
問題在於,在表單的初始加載中,重復部分中僅存在一項。 因此,如果我將數據修補到包含兩個或兩個以上字段數組項的表單,則僅將第一項應用並存儲在模型中。
有沒有一種方法可以在修補數據之前以編程方式向FieldArray添加項目,以便模型接收數據?
注意:數據的長度可以變化。
請以以下stackblitz為例: https ://stackblitz.com/edit/angular-vfykhx
constructor( private fb: FormBuilder ) patchData() { this.form=this.fb.group({ cars:this.fb.array([]) }); let data = { "cars":[ {"type":"Type1","name":"Name1"}, {"type":"Type2","name":"Name2"}] }; const fa = <FormArray>this.form.controls['cars']; data.cars.forEach((each)=>{ let tFormGroup:FormGroup=this.fb.group({ type:[each.type], name:[each.name] }); tFormGroup.patchValue(each); fa.push(tFormGroup); }) }
<form [formGroup]="form"> <div formArrayName="cars"> <div *ngFor="let car of form['controls'].cars;let i=index;" [formGroupName]="i"> <input ype="text" formControlName="type"> <input ype="text" formControlName="name"> </div> </div> </form>
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