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我试图强制验证基于一个字段的变化到FormGroup内的另一个字段内的FormArray的多个实例的这个组。我在其中一个字段上使用mydatepicker。例如,如果更改日期,那么我希望该组中的“更改原因”字段仅用于验证,以确保未选择第一个选项(值为0)。我有两个问题:angular2 formarray有条件验证
- 当我更改日期时,更改原因字段不会立即检查有效性。它只发生在我将字段的值更改为1然后更改为0.它的默认值设置为0,并且它应该在更改日期时立即选取此字段。
- 当它最终意识到窗体无效时,它会为所有更新按钮执行此操作,而不仅仅是FormGroup中Date窗口已更改的窗体。
TS文件代码:
subscribeDateChange(formGroup){
(<any>this.rfcActionTasksForm).controls.tasks.controls[0].controls['DueDate'];
const tasks = formGroup;
const changes$ = tasks.controls['DueDate'].valueChanges;
changes$.subscribe(dd => {
var arrayControl = this.rfcActionTasksForm.get('tasks') as FormArray;
var item = arrayControl.at(1);
console.log(item);
if(tasks.value['ReasonForChangeId'] == '0'){
tasks.controls['ReasonForChangeId'].setValidators(Validators.pattern(/([1-9])/));
}
});
}
ngOnInit() {
this.rfcActionTasksForm = this._fb.group({
tasks: this._fb.array([this.buildTask()])
});
}
buildTask(): FormGroup {
return this._fb.group({
Id: '',
Action: ['', Validators.required],
Step: '',
AssignedToId: ['', Validators.required],
AssignedToColour: '',
DueDate: ['', Validators.required],
ReasonForChangeId: '',
OriginalDueDate: '',
Completed: '',
OverDue: ''
},{
validator: (formGroup: FormGroup) => {
//return this.validateDays(formGroup);
//console.log(formGroup.controls['DueDate']);
//this.subscribeDateChange(formGroup.controls['DueDate'], formGroup.controls['ReasonForChangeId']);
return this.subscribeDateChange(formGroup);
}
});
}
HTML:
<form class="multi-col implementation" *ngIf="rfc.Plan [formGroup]="rfcActionTasksForm">
<div class="task-item" formArrayName="tasks" *ngFor="let task of tasks.controls; let i = index">
<div [formGroupName]="i">
<div class="row header-row">
<div class="col-md-12">
<h5 class="no-margin">Step {{i + 1}}</h5>
<input
[style.display]="'none'"
formControlName="Step">
<input
[style.display]="'none'"
formControlName="AssignedToColour">
<input
[style.display]="'none'"
formControlName="Id">
</div>
</div>
<div class="input-row row">
<div class="col-md-11">
<label for="{{'task' + i}}">Action:</label>
<div
[ngClass]="{'has-error': (tasks.get(i + '.Action').touched || tasks.get(i + '.Action').dirty) && !tasks.get(i + '.Action').valid }">
<textarea
rows="6"
id="{{'task' + i}}"
formControlName="Action"></textarea>
<span class="help-block" *ngIf="(tasks.get(i + '.Action').touched || tasks.get(i + '.Action').dirty) && tasks.get(i + '.Action').errors">
<span *ngIf="tasks.get(i + '.Action').errors.required">
Please enter a title.
</span>
</span>
</div>
</div>
<div class="col-md-1 text-center">
<label>Status</label>
<i *ngIf="tasks.get(i + '.Completed').value" class="glyphicon glyphicon-ok-sign ok" title="Completed"></i>
<i *ngIf="!tasks.get(i + '.Completed').value && !tasks.get(i + '.OverDue').value" class="glyphicon glyphicon-minus-sign pending" title="In progress"></i>
<i *ngIf="!tasks.get(i + '.Completed').value && tasks.get(i + '.OverDue').value" class="glyphicon glyphicon-exclamation-sign text-danger" title="Overdue!"></i>
</div>
</div>
<div class="input-row row">
<div class="col-md-3 assigned-to">
<div
[ngClass]="{'has-error': (tasks.get(i + '.AssignedToId').touched || tasks.get(i + '.AssignedToId').dirty) && !tasks.get(i + '.AssignedToId').valid }">
<label for="{{'assignedTo' + i}}">Assigned to:</label>
<div class="color-block" [style.background]="tasks.get(i + '.AssignedToColour').value"></div>
<label class="fa select">
<select
*ngIf="users"
id="{{'assignedTo' + i}}"
formControlName="AssignedToId">
<option
*ngFor="let user of users | trueValueFilter: 'IsActive'"
[value]="user.Id">{{user.Name}}</option>
</select>
</label>
<span class="help-block" *ngIf="(tasks.get(i + '.AssignedToId').touched || tasks.get(i + '.AssignedToId').dirty) && tasks.get(i + '.AssignedToId').errors">
<span *ngIf="tasks.get(i + '.AssignedToId').errors.required">
Please select a user.
</span>
</span>
</div>
</div>
<div class="col-md-3">
<div
[ngClass]="{'has-error': (tasks.get(i + '.DueDate').touched || tasks.get(i + '.DueDate').dirty) && !tasks.get(i + '.DueDate').valid }">
<label for="{{'dueDate' + i}}">Due date:</label>
<my-date-picker
class="datepicker"
type="text"
id="{{'dueDate' + i}}"
formControlName="DueDate"
[options]="myDatePickerOptions"></my-date-picker>
<span class="help-block" *ngIf="(tasks.get(i + '.DueDate').touched || tasks.get(i + '.DueDate').dirty) && tasks.get(i + '.DueDate').errors">
<span *ngIf="tasks.get(i + '.DueDate').errors.required">
Please set a due date.
</span>
</span>
</div>
</div>
<div class="col-md-2">
<label for="{{'reason' + i}}">Reason for change:</label>
<label class="fa select">
<select
class="reason-select"
*ngIf="reasons"
id="{{'reason' + i}}"
formControlName="ReasonForChangeId">
<option
*ngFor="let reason of reasons"
[value]="reason.Id">{{reason.Reason}}</option>
</select>
</label>
</div>
<div class="col-md-3">
<div class="text-center">
<label for="{{'OriginalDueDate' + i}}">Original due date:</label>
<span>{{tasks.get(i + '.OriginalDueDate').value | dateToStringFilter}}</span>
<input
readonly
type="text"
id="{{'OriginalDueDate' + i}}"
[style.display]="'none'"
formControlName="OriginalDueDate">
</div>
</div>
<div class="col-md-1">
<div class="text-center">
<label for="{{'completed' + i}}">Completed:</label>
<div class="checkbox-group">
<input type="checkbox"
type="checkbox"
id="{{'completed' + i}}"
formControlName="Completed">
<label class="checkbox" for="{{'completed' + i}}"></label>
</div>
</div>
</div>
</div>
<div class="row">
<div class="col-md-12">
<div>
<button
class="glyphicon glyphicon-plus-sign btn-icon add"
title="Insert task after this one"
(click)="insertTaskField(i)"></button>
<button
class="glyphicon glyphicon-remove-sign btn-icon delete"
title="Delete this task"
(click)="removeTaskField(i, tasks.get(i + '.Id')?.value)"></button>
<button
*ngIf="!tasks.get(i + '.Id').value"
(click)="saveNewTask(rfc.Id, i);"
[disabled]="!rfcActionTasksForm.valid"
class="pull-right">Save new</button>
<button
*ngIf="tasks.get(i + '.Id')?.value"
[disabled]="!rfcActionTasksForm.valid"
(click)="updateTask(i, tasks.get(i + '.Id')?.value)"
class="pull-right">Update</button>
</div>
</div>
</div>
</div>
</div>
<div class="row last">
<div class="col-md-12">
<button
class="pull-right"
[disabled]="enableUpdateAll === false"
(click)="reOrderTasks()">Update All</button>
</div>
</div>
</form>
谢谢。这个验证功能需要在哪里准确添加? – squeakie
当你构建它时,你的组中将会替换你的箭头函数'validator:(formGroup:FormGroup)=> {...}。 – n00dl3