Angular 2 Material – 在表单中使用MD的自动完成示例

有没有办法让自动填充工作在表单中？我有一个输入地址的表单.我正在使用自动完成( copied from Material Design’s docs)用于状态(这是在美国),并且除了所选状态未设置为user.state之外,它正在工作.因此,当我在控制台上注销提交时的myForm.form.value时,它看起来像这样：

user.name : "Test"
user.phone: ...
etc.

用户.state甚至没有出现.

我的(相关)代码：

<md-input-container>
  <input 
    mdInput 
    placeholder="State" 
    [mdAutocomplete]="auto"
    [formControl]="stateCtrl"
    name="user.state" 
    [(ngModel)]="user.state"
  >
</md-input-container>

<md-autocomplete 
    #auto="mdAutocomplete"
>
  <md-option 
    *ngFor="let state of filteredStates | async" [value]="state"
    (onSelectionChange)="selectState(state)"
  >
    {{ state }}
  </md-option>
</md-autocomplete>

TS：

constructor(public dialog: MdDialog,) { 
    this.stateCtrl = new FormControl();
    this.filteredStates = this.stateCtrl.valueChanges
        .startWith(null)
        .map(name => this.filterStates(name));
  }

  filterStates(val: string) {
    return val ? this.states.filter(s => new RegExp(`^${val}`,'gi').test(s))
               : this.states;
  }

即使我尝试使用(onSelectionChange)调用函数selectState(state)来设置user.state,它仍然不会出现在我console.log表单上提交时.

selectState(value){
    this.user.state = value;
  }

<form #f="ngForm">
  <md-input-container>
    <input mdInput placeholder="State" [mdAutocomplete]="tdAuto" name="state" 
       #state="ngModel" [(ngModel)]="currentState"
      (ngModelChange)="tdStates = filterStates(currentState)">
  </md-input-container>

  <md-autocomplete #tdAuto="mdAutocomplete">
    <md-option *ngFor="let state of tdStates" [value]="state">
      <span>{{ state }}</span>
    </md-option>
  </md-autocomplete>    
</form>

filterStates(val: string) {
  if (val) {
    const filterValue = val.toLowerCase();
    return this.states.filter(state => state.toLowerCase().startsWith(filterValue));
  }
  return this.states;
}