我试图在Angular2中实现(带有TS在Plunker中的测试版0)带有2个嵌套窗体的场景,每个窗体都由组件表示。Angular2测试版:嵌套基于窗体的父/子组件,并从父项验证
父组件是Word
,它表示假字典中的单词。孩子们的组成部分是WordSense
's,每个都代表父母的意思。
这两个组件都使用模型驱动的表单,并且子表单绑定其模型的值以使用ngModel
形成控件。通过这种方式,父组件可以很容易地将其单词的感觉传递给子组件,而双向绑定完成剩下的工作。
简单的自定义验证器附加到这两个表单。除此之外,我希望不仅在单词形式无效时禁用“提交”按钮,而且在任何感官无效时也禁用提交按钮。为此,我在正在编辑的模型中添加了一个isValid
属性,并在代码中观察感官形式的变化:每当发生变化时,我检查表单的valid
属性并相应地设置模型的属性。然后,我可以在视图和代码中的父级组件级别轻松添加检查,以便只有在两个表单均可用时才能发布检查。
为了支持自定义验证和其他逻辑,我将我的初始代码从基于模板的模型切换到基于模型的模板;但是,只要我启动重构代码,我会得到几个没有指令注释发现错误,我不确定它们的含义。
也许我错过了一些明显的东西,但我是一个新手。任何人都可以提出建议吗?你可以在这个plunker找到一个repro:http://plnkr.co/edit/v9Dj5j5opJmonxEeotcR。下面是它的一些基本代码:
一)父组件:
@Component({
selector: "word",
directives: [FORM_DIRECTIVES, FORM_PROVIDERS, WordSense],
templateUrl: `
<div>
<form [ngFormModel]="wordForm"
(ngSubmit)="onSubmit(wordForm.value)"
role="form">
<div class="form-group"
[class.has-error]="!lemma.valid && lemma.touched">
<label for="lemma">lemma</label>
<input type="text" id="lemma"
maxlength="100" required spellcheck="false"
class="form-control"
placeholder="lemma"
[ngFormControl]="wordForm.controls['lemma']">
<div *ngIf="lemma.hasError('required') && lemma.touched"
class="text-danger small">lemma required</div>
<div *ngIf="lemma.hasError('lemmaValidator') && lemma.touched"
class="text-danger small">invalid lemma</div>
</div>
...
<div class="form-group">
<table class="table table-bordered">
<tbody>
<tr *ngFor="#s of senses">
<td>
<word-sense [sense]="s" [ranks]="ranks" [fields]="fields"></word-sense>
</td>
</tr>
</tbody>
</table>
</div>
...
<button type="submit"
[ngClass]="{disabled: !wordForm.valid}"
class="btn btn-primary btn-sm">save</button>
</form>
</div>
`,
inputs: [
"word"
]
})
export class Word {
private _word: IWordModel;
public set word(value: IWordModel) {
this._word = value;
this.setFormValues();
}
public get word() {
return this._word;
}
// ...
// form
public wordForm: ControlGroup;
public lemma: Control;
public language: Control;
public class: Control;
public ranks: IPair<number>[];
public senses: ISenseViewModel[];
public fields: IFieldModel[];
constructor(private formBuilder:FormBuilder) {
// ...
this.senses = [
this.createSense()
];
// ...
// build the form
this.wordForm = this.formBuilder.group({
"lemma": ["", Validators.compose([Validators.required, LemmaValidator.isValidLemma])],
"language": ["eng", Validators.required],
"class": ["s.", Validators.required],
});
this.lemma = <Control> this.wordForm.controls["lemma"];
this.language = <Control> this.wordForm.controls["language"];
this.class = <Control> this.wordForm.controls["class"];
// ...
}
}
B)的子组件:
@Component({
selector: "word-sense",
directives: [FORM_DIRECTIVES],
template: `
<form class="form-inline" role="form" [ngFormModel]="senseForm">
<div class="form-group"
[class.has-error]="!definitionCtl.valid">
<input type="text"
class="form-control"
placeholder="definition"
[ngFormControl]="definitionCtl"
[(ngModel)]="sense.definition">
</div>
<div class="form-group"
[class.has-error]="!yearCtl.valid">
<input type="number"
class="form-control"
placeholder="date"
[ngFormControl]="yearCtl"
[(ngModel)]="sense.year">
</div>
...
</form>
`,
inputs: [
"sense",
"ranks",
"fields"
]
})
export class WordSense {
// model being edited
public sense: ISenseViewModel;
// lookup data
public ranks: IPair<number>[];
public fields: IFieldModel[];
public field: IFieldModel;
// form
public senseForm: ControlGroup;
public definitionCtl: Control;
public yearCtl: Control;
public rankCtl: Control;
public fieldsCtl: Control;
constructor(private formBuilder: FormBuilder) {
this.senseForm = this.formBuilder.group({
"definition": ["", Validators.required],
"year": [0, Validators.compose([Validators.required, YearValidator.isValidYear])],
"rank": [{value: 2, label: "media"}, Validators.required],
"fields": [""]
});
this.definitionCtl = <Control> this.senseForm.controls["definition"];
this.yearCtl = <Control> this.senseForm.controls["year"];
this.rankCtl = <Control> this.senseForm.controls["rank"];
this.fieldsCtl = <Control> this.senseForm.controls["fields"];
}
// ...
}
[使用组件的角2形式级别的验证](的可能的复制http://stackoverflow.com/questions/34980344/angular-2-form-level-validation-using -components) –