我正在尝试将html表单转换为嵌套的json。这些是我的课程:
export class Config {
id: string;
name: string;
email: string;
lchart:ComponentLinechart;
}
export class ComponentLinechart {
name_linechart : String;
xAxis_linechart : String;
yAxis_linechart : String;
}
formcomponent.ts:-
export class FormsComponent implements OnInit {
newConfig: Config = new Config();
constructor(private service : MyserviceService, private configservice:ConfigurationService) {
}
email = new FormControl('', [Validators.required, Validators.email]);
xAxisControl = new FormControl('', Validators.required);
yAxisControl = new FormControl('', Validators.required);
name_linechart = new FormControl('', Validators.required);
name = new FormControl('', Validators.required);
getConfig(): void {
this.configservice.getConfig()
.subscribe(data => this.configs = data );
}
createConfiguration(todoForm: NgForm): void {
this.configservice.createConfig(this.newConfig)
.subscribe(createconfig => {
todoForm.reset();
this.newConfig = new Config();
this.configs.unshift(createconfig)
});
}
The formcomponent.html:-
<form #todoForm="ngForm" (ngSubmit)="createConfiguration(todoForm)" novalidate>
<div class="example-container">
<mat-form-field appearance="fill">
<mat-label>Enter your name</mat-label>
<input matInput [(ngModel)]="newConfig.name" name="name" [formControl]="name" required>
</mat-form-field>
<br>
<mat-form-field appearance="fill">
<mat-label>Enter your email</mat-label>
<input matInput placeholder="[email protected]" [(ngModel)]="newConfig.email" name="email"
[formControl]="email" required>
<mat-error *ngIf="email.invalid">{{getErrorMessage()}}</mat-error>
</mat-form-field>
<br>
<mat-form-field appearance="fill">
<mat-label>Name-linechart</mat-label>
<input matInput [(ngModel)]="newConfig.name_linechart" name="name_linechart"
[formControl]="name_linechart" required>
</mat-form-field>
<br>
<mat-form-field *ngIf = "sales" >
<mat-label>xAxis-linechart</mat-label>
<mat-select [(ngModel)]="newConfig.xAxis-linechart" name="xAxis-linechart"
[formControl]="xAxisControl" required>
<mat-option *ngFor="let field of fields" [value] = "field">
{{field}}
</mat-option>
</mat-select>
<mat-error *ngIf="xAxisControl.hasError('required')">Please choose a field</mat-error>
</mat-form-field>
<br>
<mat-form-field *ngIf = "sales" >
<mat-label>yAxis-linechart</mat-label>
<mat-select [(ngModel)]="newConfig.yAxis-linechart" name="yAxis-linechart"
[formControl]="yAxisControl" required>
<mat-option *ngFor="let field of fields" [value] = "field">
{{field}}
</mat-option>
</mat-select>
<mat-error *ngIf="yAxisControl.hasError('required')">Please choose a field</mat-error>
</mat-form-field>
预期结果:
{
"name": "adam",
"email": "[email protected]",
"lchart": {
"name_linechart": "books",
"xAxis_linechart": "library",
"yAxis_linechart": "percentage"
}
}
但是这就是我得到的:
{
"name": "adam",
"email": "[email protected]",
"lchart": null
}
我试图在formcomponent.html中编写newConfig.lchart.name_linechart,但它给了我错误:
TypeError : cannot read property name_linechart of undefined.
Foufa,从不,从不,从不,从不在same标记中使用[(ngModel)]和formControlName(或formControl)。一个用于模板表单,另一个用于ReactiveForms,请参见the docs
嗯。您有一个具有属性的对象,其中一个是对象,因此,您有一个带有某些FormControls和一个FormGroup的FormGroup,(再次the docs)
myForm=new FormGroup({
name:new FormControl(),
email:new FormControl(),
lchart:new FormGroup({
name_linechart: new FormControl(),
xAxis_linechart: new FormControl(),
yAxis_linechart: new FormControl(),
})
})
和.html
<form [formGroup]="myForm">
<!--see, under the formGroup, we using formControlName for the formControl-->
<input formControlName="name">
<input formControlName="email">
<!--when we has a FomgGroup, we use formGrpupName in a div-->
<div formGroupName="lchart">
<!--and formControlName under the div -->
<input formControlName="name_linechart">
<input formControlName="xAxis_linechart">
<input formControlName="yAxis_linechart">
</div>
</form>
<!--we can add, only for check-->
<pre>
{{myForm?.value|json}}
</pre>
<< [Update一如既往,是否使用了接收对象并创建表格的函数
getForm(data:any)
{
data=data || { name:null,
email:null,
lchart:{
name_linechart:null,
xAxis_linechart:null,
yAxis_linechart:0
}
}
return new FormGroup({
name:new FormControl(data.name,Validator.required),
email:new FormControl(data.email,[Validator.required,Validators.emailValidator),
lchart:new FormGroup({
name_linechart: new FormControl(data.lchart.name_linechart),
xAxis_linechart: new FormControl(data.lchart.xAxis_linechart),
yAxis_linechart: new FormControl(data.lchart.yAxis_linechart),
})
}
并用作
myForm=this.getForm(data) //<--if we has an object "data" //or myForm=this.getForm(null) //if we want a empty form
应该是
[(ngModel)]="newConfig.lchart.name_linechart"
[(ngModel)]="newConfig.lchart.xAxis_linechart"
[(ngModel)]="newConfig.lchart.yAxis_linechart"
将构造函数更改为-
constructor(private service : MyserviceService, private configservice:ConfigurationService) { this.newConfig.lchart=new ComponentLinechart(); //add this line }