FormControlName不适用于离子无线电 [英] FormControlName not working with ion-radio
问题描述
新功能:
New:
所以我可以使它与无线电组一起工作,或者没有正确的约束.我无法同时使用两者.
So I can get it to work withou a radio-group or withouth the right bindings. I can't get it to work with both.
这是允许的:
<div *ngFor="let column of row.controls.columns.controls; let j = index">
<ion-list radio-group [formControlName]="'col'+j">
<ion-radio></ion-radio>
</ion-list>
</div>
但是然后我没有一个广播组的列表,我更改什么都没关系,它总是会中断.如果我将列表移到它的中断点之外,请将formControlName移动到它的中断点.我真的不知道如何使它工作.
But then I don't have a list with a radio-group, it doesn't matter what I change it will always break. If I move the list outside it breaks, move the formControlName it breaks. I really don't know how to get this to work.
我认为这应该是一种方法:
I would think that this should be the way to go:
<ion-list radio-group>
<div *ngFor="let column of columns; let j = index">
<div [formControlName]="'col'+j">
<ion-radio></ion-radio>
</div>
</div>
</ion-list>
但还是同样的错误:
错误:表单控件的无值访问器,其路径为:'行-> 0-> col0'
Error: No value accessor for form control with path: 'rows -> 0 -> col0'
i =我需要的行数. j =我需要的选项/问题的数量.
i = the amount of rows I need. j = the amount of options/questions I need.
旧版本:
Old:
我正在尝试将离子无线电用作表单组中的输入字段,但它一直给我错误:
I am trying to use the ion-radio as a input field in a formgroup but it keeps giving me the error:
没有用于带有路径...的表单控制的值访问器
No value accessor for form control with path ...
所以我切换到类型为"radio"的输入,但是如果要对它们进行分组,我需要给它们起相同的名称,因为我使用的是* ngFor,所以我不能这样做,否则我的formControlName是不再正确了.
So I switched to an input with type="radio", but if I want to group those, I need to give them the same name, which I can't because I am using a *ngFor and otherwise my formControlName is not correct anymore.
有人可以帮助我使离子无线电正常工作吗?分组看起来会更好,更容易.
Can anybody help me to get the ion-radio to work? It would look better and easier to group.
<ion-col radio-group class="radioGroup" col-6>
<ion-col *ngFor="let column of columns; let j = index">
<input value="X" formControlName="col{{j + 1}}" type="radio" />
<!-- <ion-radio value="X"></ion-radio> -->
</ion-col>
</ion-col>
创作:
this.inspectionTableForm = this.formBuilder.group({
header: this.formBuilder.group({
title: [this.question.properties.header[0]],
columns: this.formBuilder.array([
this.formBuilder.control('')
]),
comments: ['']
}),
rows: this.formBuilder.array([
this.initRow()
])
});
private initRow() {
// Create the temp control
let tempControl = this.formBuilder.group({
title: '',
});
// Create an array for the columns
let arr = [];
for (let index = 0; index < this.question.properties["number-of-columns"]; index++) {
// Push a control to the array and also one for the value on a higher level
arr.push(this.columns[index])
tempControl.addControl(`col${index}`, this.formBuilder.control('')) // Col-1-2-3
};
tempControl.addControl('columns', this.formBuilder.array(arr)) //Array
// Check if we need to add the comment field
if (this.question.properties["comment-field"]) {
tempControl.addControl('comment', this.formBuilder.control(''))
}
return tempControl;
}
编辑半有效的新代码(感谢xrobert35):
Edit semi working new code (thanks xrobert35):
<ion-col radio-group [formControlName]="'col'+i">
<ion-item *ngFor="let column of row.controls.columns.controls">
<ion-radio></ion-radio>
</ion-item>
</ion-col>
这是我按第一个选项,然后按第二个,然后按第三个选项时得到的:
This is what I get when I press the first option, then second and then third:
它用一些奇怪的值更新相同的列.我认为问题是我不需要i作为索引,而是j,但是当我这样做时它会中断.像这样:
It updates the same col with some weird value. I think the problem is that I do not need i as index but j, but it breaks when I do that. Something like this:
<ion-col radio-group >
<ion-item *ngFor="let column of row.controls.columns.controls; let j = index" [formControlName]="'col'+j">
<ion-radio></ion-radio>
</ion-item>
</ion-col>
没有用于窗体控制的值访问器,其路径为:'行-> 0-> col0'
No value accessor for form control with path: 'rows -> 0 -> col0'
推荐答案
您不能将指令formControlName与ion-radio一起使用,因为您只能在与ngModel一起使用的组件上使用它.
You can't use the directive formControlName with ion-radio cause you can only use it on a component which work with ngModel.
我知道您需要一个离子无线电列表,但是只有一个值绑定到formGroup中.因此,您可以像在文档中一样使用离子列表组件?并将[(ngModel)]替换为formGroupName
I understand that you want a list of ion-radio but only one value bind into the formGroup. So you can use a ion-list component like in the documentation ? and replace the [(ngModel)] by formGroupName
<ion-list radio-group formControlName="myFormGroupName">
<ion-item>
<ion-label>Friends</ion-label>
<ion-radio value="friends" checked></ion-radio>
</ion-item>
<ion-item>
<ion-label>Family</ion-label>
<ion-radio value="family"></ion-radio>
</ion-item>
<ion-item>
<ion-label>Enemies</ion-label>
<ion-radio value="enemies" [disabled]="isDisabled"></ion-radio>
</ion-item>
</ion-list>
https://ionicframework.com/docs/api/components/radio/RadioButton/
新代码,您的html应该看起来像这样
New code Your html should look like something like this
<div [fromGroup]="inspectionTableForm">
<div *ngFor"let question of questions; let indexRow=index" class="row" formArrayName="rows">
<span> {{question.libelle}} </span>
<ion-list radio-group [formControlName]="'answer'+indexRow">
<ion-item *ngFor="let answer of question.answers">
<ion-label>{{answer.labelle}}</ion-label>
<ion-radio [value]="answer.value"></ion-radio>
</ion-item>
</ion-list>
<textarea formControlName="comment">
</div>
</div>
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